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Table: Trellix Provided Indicators

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The following table lists the Trellix indicators that are shipped with the module.

Name

Description

Target

ARCHIVE FILES

Adversaries may use various utilities to archive files in Linux. This is associated with MITRE

linux

ARCHIVE FILES VIA PYTHON

Adversaries may use various python libraries to archive files in Linux. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1560.002.

linux

ARCHIVE WITH SSH FILES LINUX (METHODOLOGY)

This IOC detects an adversary enumerating and gathering all ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r)

linux

AT (UTILITY)

Adversaries can use AT utility in Linux to establish persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s):

linux

AUTOSTART SERVICE ON BOOT (METHODOLOGY)

Systemd utilizes configuration files known as service units to control how services boot and under what conditions. To start a service on boot by default, a symlink of the service file must be placed in the multi-user.target.wants directory. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.002.

linux

AXETERROR (BACKDOOR)

AXETERROR is a Go compiled backdoor related to Exaramel backdoor family. This malware creates a persistence task based on the operating system configurations and has the capability to execute commands on the system and send the stored results to a remote command and control server.

linux

BASE64 ENCODING (METHODOLOGY)

Adversaries often use base64 encoding to obfuscate their payloads. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Command and Control and Technique(s): T1027, T1132.001.

linux

BASH_PROFILE AND BASHRC

Attackers can add their program to ~/.bash_profile to execute on every login shell or to ~/.bashrc to execute on every interactive non-login shell. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1546.004.

linux

BINARY PADDING USING DD (METHODOLOGY)

This IOC detects modification of a file by appending junk characters to the end of a file. This technique is used by attacker to change the hash of the file. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1027.001.

linux

CHAGE (UTILITY)

Attackers can use chage utility to view or change password policies to their advantage, for example: they can make their passwords for their backdoor accounts to never expire so that they do not lose access. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery

linux

CHANGING FILE OWNER OR GROUP LINUX

(METHODOLOGY)

This IOC detects the command line for changing file owner or group.This can lock other users out of access to the file, thus hampering removal or inspection. It may also be required in order to execute a file in certain, elevated context.This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense Evasion and Technique(s): T1548.001.

linux

CHANGING GROUP COMMAND RECURSIVELY

LINUX (METHODOLOGY)

This IOC detects the command line for changing the group ownership recursively which can be abused to elevate priviledges.This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense Evasion and Technique(s): T1548.001.

linux

CHMOD (UTILITY)

CHMOD is a utility to change the access permissions of files and directories. This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense Evasion and

Technique(s): T1548.001.

linux

CLEAR LOGS

(METHODOLOGY)

Adversaries may clear logs to hide their tracks. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.002.

linux

CLEARING SESSION COMMAND HISTORY LINUX

(METHODOLOGY)

When commands are executed via the command-line, they are stored in the session's history. This IOC detects a threat actor removing the commands saved by the terminal's session history. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Defense

Evasion, Impact and Technique(s): T1059.004, T1070.003, T1565.001.

linux

COOKIEJAR (BACKDOOR)

COOKIEJAR is a malicious apache plugin which intercepts SSL connections to the webserver. The malware which is dropped through webshell monitors for specific URI requests and executes code on the infected system. This is associated to MITRE ATT&CK (r) Tactic: Persistence and Technique: T1505.003

linux

COPYING SHELL TO NEW LOCATION (METHODOLOGY)

This IOC detects the creation of the shell from a directory masquerading as the current parent directory. Attackers can copy the shell binary to a new location and then executes against the copy of shell. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1036.005.

linux

CREDENTIAL DUMPING LINUX (METHODOLOGY)

Adversaries may attempt to dump the contents of /etc/passwd and /etc/shadow to enable offline password cracking. This is associated with MITRE ATT&CK (r) Tactic(s): Credential

Access, Execution, Discovery and Technique(s): T1003.008, T1059.004, T1087.001.

linux

CRON (UTILITY)

Adversaries can use CRON utility in Linux to establish persistence. Note that builtin commands like echo can also be used to write to crontab file and since builtin command executions are not captured in process command line, this IOC looks generically for presence of crontab files in any process command line which does not necessarily mean that a cron job is being created. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation, Defense Evasion and Technique(s): T1053.003,

T1036.003.

linux

CRONTAB (UTILITY)

Attackers may use cron utility to establish persistence on the system. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and

Technique(s): T1053.003.

linux

CURL INSECURE EXECUTION LINUX (METHODOLOGY)

curl is a tool to transfer data from or to a server, using various protocols. Although curl can be used for benign operations, source endpoints should be investigated if there is no authorized use of curl to work in insecure mode in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Command And Control and

Technique(s): T1059.004, T1564, T1105.

linux

CURL SILENT EXECUTION LINUX (METHODOLOGY)

curl is a tool to transfer data from or to a server, using various protocols. Although curl can be used for benign operations, source endpoints should be investigated if there is no authorized use of curl to work in silent mode in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Command And Control and

Technique(s): T1059.004, T1564, T1105.

linux

DD (UTILITY)

Adversaries may use dd utility to overwrite files. This is associated with MITRE ATT&CK (r)

Tactic(s): Impact, Defense Evasion and Technique(s): T1485, T1070.002.

linux

DETECTING INIT SYSTEM USING SHELL

(METHODOLOGY)

This IOC detects a common commandline used to determine which init system is on a linux server as we have differet variants for different linux OS. With this information, the attackers may create or modify systemd services to repeatedly execute malicious payloads.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege

Escalation and Technique(s): T1543.002.

linux

DISABLE SYSLOG

(METHODOLOGY)

Adversaries may disable syslog service to disable system logging. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

linux

DUMPING KERNEL SYMBOLS TO TMP FILE (METHODOLOGY)

This IOC detects the dumping of the symbol list into a temporary file in the root directory. It can then be used to extract the memory address of several functions and kernel variables and store them in memory for future use. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1547.006.

linux

ENCRYPT FILES

(METHODOLOGY)

Adversaries may use various utilities to encrypt files in Linux. This is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1486.

linux

ENUMERATION OF OS INFORMATION

(METHODOLOGY)

This IOC detets enumeration of OS information. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

linux

ENUMERATION OF SSH FILES LINUX (METHODOLOGY)

This IOC detects an adversary enumerating all ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004.

linux

ENUMERATION OF SYSTEM INFORMATION LINUX (METHODOLOGY)

Various native built-in commands can be executed to pull back a variety of information including software version, firewall settings, and network connections. This IOC detects the gathering of basic system information from a Linux machine. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016, T1033, T1049, T1057, T1059.004, T1082, T1087.001, T1087.002.

linux

ENV (UTILITY)

This IOC detects the execution of env which can be used to list environment variables. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

linux

EXFILTRATION OF SSH FILES LINUX (METHODOLOGY)

This IOC detects exfiltration of ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and

linux

FILE (UTILITY)

FILE is a utility used to determine the type of a file. This is associated with MITRE ATT&CK

linux

FILE AND FOLDER DELETION LINUX (METHODOLOGY)

Adversaries may delete files and/or folders left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary may leave traces to indicate to what was done within a network and how.

Adversaries may also destroy data and files on specific systems or in large numbers on a network to interrupt availability to systems, services, and network resources. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Defense Evasion, Impact and

Technique(s): T1059.004, T1070.004, T1485.

linux

FILE AND FOLDER DISCOVERY LINUX

(METHODOLOGY)

Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Discovery

and Technique(s): T1059.004, T1083.

linux

FILE DOWNLOADS VIA CURL LINUX (METHODOLOGY)

curl is a tool to transfer data from or to a server, using various protocols. Although curl can be used for benign operations, source endpoints should be investigated if there is no authorized use of curl for downloads in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and Technique(s): T1105, T1059.004.

linux

FILE MODE CHANGED TO EXECUTABLE LINUX

(METHODOLOGY)

Attackers can use chmod utility to add executable attribute to the file and run it successfully on the victim machine. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.004.

linux

FILESYSTEM DELETION LINUX (METHODOLOGY)

Adversaries may destroy data and files on specific systems or in large numbers on a network to interrupt availability to systems, services, and network resources. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Impact and

Technique(s): T1059.004, T1070.004, T1485.

linux

FILTERING INFORMATION ABOUT SYSTEM

(METHODOLOGY)

This IOC detects the execution of command grep which can be used to filter the information about the system along with the use of various other commands. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

GET (UTILITY)

GET utility is used to copy data from a remote environment to files in a directory in the local UNIX environment. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

linux

HIDDEN FOLDER

(METHODOLOGY)

Adversaries may create hidden folders to avoid user suspicion. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1564.001.

linux

HISTCONTROL (METHODOLOGY)

HISTCONTROL can be used to control which commands will be saved in bash history. Attackers can specify ignorespace,ignoredups or ignoreboth as value of HISTCONTROL and then use it to their advantage for example by using commands starting with spaces to avoid traces of their commands in bash history. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.003.

linux

IMPORT (UTILITY)

Adversaries may use import utility to take screenshots. This is associated with MITRE

ATT&CK (r) Tactic(s): Collection and Technique(s): T1113.

linux

INGRESS TOOL TRANSFER (METHODOLOGY)

Adversaries may transfer files and tools from a remote system into a compromised host. This IOC detects the various utilities that could be used for file transfer. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and Technique(s):

T1105, T1059.004.

linux

INTERCEPTER NG (UTILITY)

Intercepter NG is an utility which is used to perform man-in-the-middle attacks. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Discovery and Technique(s):

T1040.

linux

KEEPING CONTAINER ALIVE

(METHODOLOGY)

This IOC detects the commandline which uses tail utility in linux to keep the container alive and running which helps in executing the shell scripts indefinitely.This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1053.003, T1053.007.

linux

KEXTLOAD (UTILITY)

KEXTLOAD is a utility used to explicitly load kernel extensions. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1547.006.

linux

LDAPSEARCH (UTILITY)

LDAPSEARCH is a utility that opens a connection to an LDAP server, binds to it, and performs a search using a filter. This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1069.002.

linux

LINPEAS (UTILITY)

LinPEAS is a script that search for possible paths to escalate privileges on Linux. Attackers may enumerate all the possible ways or methods to elevate privileges This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense Evasion and Technique(s):

T1548.003.

linux

LN (UTILITY)

LN is a utility used to create a hard link or a symbolic link (symlink) to an existing file or directory. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege

Escalation and Technique(s): T1543.002.

linux

LOCAL ACCOUNT DISCOVERY

(METHODOLOGY)

Adversaries may attempt to discover local accounts during local reconnaissance. This is

associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1087.001.

linux

LOCAL GROUPS DISCOVERY

(METHODOLOGY)

Adversaries may attempt to find local groups. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1069.001.

linux

LSMOD (UTILITY)

Attackers may use lsmod utility to list the linux modules. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

linux

MODIFICATION OF HOSTS FILE LINUX (METHODOLOGY)

This IOC detects the modification of the hosts file. The host file is often used to sinkhole network communications for security products. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Discovery, Execution and Technique(s): T1018, T1562.001,

T1059.004.

linux

MSFVENOM COMMAND LINE INTERFACE (UTILITY)

Msfvenom is a command line instance of Metasploit that is used to generate and output all of the various types of shell code that are available in Metasploit. Attackers may create malicious payloads and encode these payloads using various encoder modules. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

NETWORK PROXY CHANGED USING HTTP_PROXY

(METHODOLOGY)

Attackers sometimes change the HTTP proxy to redirect all the network to their command and control server. This IOC looks for possible modification of HTTP proxy by exporting HTTP_PROXY environment variable. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control and Technique(s): T1090.001.

linux

NETWORK SNIFFING

(METHODOLOGY)

Adversaries may use various utilities like tcpdump to do network sniffing. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Discovery and Technique(s): T1040.

linux

NSLOOKUP EXECUTION

This IOC detects the use of the nslookup utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1018.

linux

OPENSSH CONFIGURATION

(UTILITY)

This IOC detects the OpenSSH daemon configuration. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence and Technique(s): T1098.004.

linux

OPENSSL USAGE

(METHODOLOGY)

This IOC detects the use of openssl utility. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1132.

linux

PAM LOG PASSWORDS (METHODOLOGY)

Adversaries may log user passwords by changing the PAM configuration files. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Credential Access and Technique(s): T1056.001.

linux

PASSWORD POLICY DISCOVERY

(METHODOLOGY)

Attackers discover password policies by reading configuration files which can help them in the next phases of the attack. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Credential Access, Defense Evasion, Persistence and Technique(s): T1201, T1556.003.

linux

PING (UTILITY)

Ping utility can be used to discover remote machines on a network. This is associated with

MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1018.

linux

POSSIBLE REMOTE ACCESS SERVICES LINUX

(METHODOLOGY)

This IOC detects execution of different remote access services within the system. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Lateral Movement and

Technique(s): T1105, T1219, T1021.005

linux

POTENTIAL BASH REVERSE SHELL LINUX

(METHODOLOGY)

This IOC detects the reverse shell written in bash commands. Kindly investigate the source of the activity to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

POTENTIAL CREDENTIAL DUMPING (METHODOLOGY)

This IOC detects some indicators associated with domain credential dumping and suspicious login attempt from an infected host. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral Movement, Execution, Persistence, Privilege Escalation, Initial Access and Technique(s): T1550.002, T1059.004, T1078.

linux

POTENTIAL LOGIN ATTEMPT THROUGH VNC

(METHODOLOGY)

Adversaries may access hosts using valid accounts through Virtual Network Computing (VNC). This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.005.

linux

POTENTIAL SSH EXFILTRATION

(METHODOLOGY)

Adversaries may use SSH for exfiltration of data. This is associated with MITRE ATT&CK (r) Tactic(s): Exfiltration and Technique(s): T1048.

linux

POTENTIAL TAMPERING OF AUDITD CONFIGURATION

(METHODOLOGY)

Adversaries may tamper with auditd configuration for evasion. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.006.

linux

POTENTIAL TAMPERING OF SYSLOG CONFIGURATION

Adversaries may tamper with syslog configuration for evasion. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.006.

linux

PROCESS CREATION FROM DELETED IMAGE

This IOC detects the forking of new process from deleted elf file. Malware will delete its executable from the its directory inside /proc to avoid detection and analysis. This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.004.

linux

PYTHON EXECUTION

Adversaries may use python commands or scripts for execution. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.006.

linux

QUIETPULSE (BACKDOOR)

QUIETPULSE utility is a shell script invoked by a malicious version of dsserver that primarily functions as a utility script responsible for copying files and executing commands that has been seen during CVE-2021-22893 exploitation. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Defense Evasion and Technique(s): T1059.004, T1554, T1036.005.

linux

REMOTE FILE COPY TOOLS (METHODOLOGY)

This IOC looks for linux tools that can be used to copy files from and to remote machines. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Lateral Movement and Technique(s): T1105, T1570.

linux

REMOTE SYSTEM DISCOVERY LINUX

(METHODOLOGY)

Attackers can leverage utilities like arp, nmap, etc. to discover the information on remote systems in a network. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016, T1018, T1049, T1059.004, T1046.

linux

REMOTE SYSTEM DISCOVERY VIA SWEEP

LINUX (METHODOLOGY)

Attackers can leverage ping utility to discover the information on remote systems in a network by running a ping sweep. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016, T1049, T1059.004, T1018.

linux

ROOT SSH LOGIN USING SSHPASS VIA PASSWORD

(METHODOLOGY)

This IOC detects the usage of sshpass utility attempting to ssh login as a root user using password.This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.004.

linux

ROOT SSH LOGIN USING SSHPASS VIA SSHKEY

(METHODOLOGY)

This IOC detects the usage sshpass utility & attempts to ssh login as a root user using sshkey.This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.004.

linux

RSYSLOG (UTILITY)

Rsyslog is a system utility providing support for message logging for both local and remote machines which attackers can run for recording sensitive details.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.002.

linux

RUNNING RC SCRIPTS DURING BOOT

(METHODOLOGY)

This IOC detects the suspicious commandline by which adversaries can establish persistence by adding a malicious binary path or shell commands to rc.local.Upon reboot, the system executes the script's contents as root, resulting in persistence.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1037.004.

linux

SECURITY SOFTWARE

DISCOVERY (METHODOLOGY)

Adversaries may try to discover the security software installed on the machine. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1518.001.

linux

SERVICE (METHODOLOGY)

Adversaries can create or modify systemd service to achieve persistence and privilege escalation. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.002.

linux

SETTING IMMUTABLE BIT TO FILE (METHODOLOGY)

This IOC sets the file with an immutable attribute by which the user cannot modify, rename, delete and link the file by anyone including the root user, thus attackers after entering the system can install the service and set this bit to prevent deletion.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.002.

linux

SETUID AND SETGID (METHODOLOGY)

Attackers may set setuid or setgid bits on malicious executables to execute with elevated privileges. This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense

linux

SHARED LIBRARY MODIFICATION

(METHODOLOGY)

This IOC detects addition of new shared libraries. Attacker can set this value pointing to malicious library file & during execution shared library will also get called. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1055.

linux

SHELL SCRIPT LINUX (METHODOLOGY)

This IOC detects various operations on a shell script such as creation, modification, download, execution, etc. Source endpoints should be investigated if there is no authorized use of shell scripts in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

SMBSTATUS (UTILITY)

Adversaries may use smbstatus utility to discover network shares. This is associated with

MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1135.

linux

SSH LOGIN ATTEMPT USING LOCAL KEY FILE

Adversaries may use valid accounts to log into remote machines using Secure Shell (SSH). This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement, Defense Evasion, Persistence, Privilege Escalation, Initial Access and Technique(s): T1021.004, T1078.001,

T1078.002, T1078.003.

linux

SUDO STDIN PASSWORD READ (METHODOLOGY)

When pwfeedback option is enabled in sudoers file, a user on the host could trigger a stack - based buffer overflow (CVE-2019-18634) in sudo which can be used for privilege escalation. This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense

linux

SUSPICIOUS ACCESS OF CREDENTIAL STORE LINUX

This IOC detects suspicious access of password and user account files on a Linux host. This technique is used by malware during setting up of a custom local account for remote persistent access. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access,

linux

SUSPICIOUS ACCESS OF SENSITIVE FILES

(METHODOLOGY)

Adversaries may search local system to find files of interest and sensitive data prior to Exfiltration. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and

linux

SUSPICIOUS ACCESS TO WINDOWS SMB SHARES

Malware could access and attain lateral movement though SMB file shares. This IOC detects suspicious SMB connections from a Linux machine. This is associated with MITRE

linux

SUSPICIOUS ATTEMPT TO MODIFY SSH CONFIGURATION

This IOC detects suspicious modification of Secure Shell configurations to allow specific connections to the infected host. This technique is used by malware during setting up of a custom local account for remote persistent access. This is associated with MITRE ATT&CK

Movement and Technique(s): T1021.004, T1078.003.

linux

SUSPICIOUS ATTEMPT TO UPLOAD CROWN PLUGIN

LINUX (EXPLOIT)

This IOC detects suspicious connection to a Atlassian Crowd server over a non-TLS channel to upload plugin file. This could be an attempt to exploit CVE-2019-11580. This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access and Technique(s): T1190.

linux

SUSPICIOUS CHILD PROCESS FROM FIREFOX (EXPLOIT)

This IOC detects suspicious creation of new process from firefox. This could be due to a potential exploitation of vulnerability in firefox or one of the installed addons for remote code execution. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Initial Access

linux

SUSPICIOUS CODE EXECUTION FROM VIM

This IOC detects suspicious code execution from vim editor. This could be due to a potential exploitation of modeline feature through specially crafted file. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1203.

linux

SUSPICIOUS COLLECTION OF SYSTEM INFORMATION

This IOC detects the various commands used for collecting process and resources information on an infected host. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery,Execution and Technique(s): T1082, T1059.004.

linux

SUSPICIOUS CRYPTOMINING ACTIVITY A

Attackers sometimes deploy cryptominers to make profit by mining crytpo currency. This IOC looks for the network protocols associated with crypto mining. Kindly investigate the source of activity to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1496.

linux

SUSPICIOUS DATA TRANSFER IN BYTES

An adversary may exfiltrate data in fixed size chunks instead of whole files or limit packet sizes below certain thresholds. This approach may be used to avoid triggering network data transfer threshold alerts. This is associated with MITRE ATT&CK (r) Tactic(s): Exfiltration and Technique(s): T1030.

linux

SUSPICIOUS EXECUTION OF CURL (METHODOLOGY)

This IOC detects the suspicious execution of curl command to download files from a remote server using a self signed certificate without any output message. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1105.

linux

SUSPICIOUS FILE DELETION (METHODOLOGY)

Malware tend to delete the file system indicators to avoid leaving traces on infection on the victim host. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral Movement and Technique(s): T1070.004

linux

SUSPICIOUS FILE READ

Use of the cat utility to view the contents of a file. This is associated with MITRE ATT&CK (r)

linux

SUSPICIOUS GREP USAGE

This IOC detects the suspicious usage of GREP command. This is associated with MITRE

linux

SUSPICIOUS HIDDEN FILE IN CONFIGURATION DIRECTORY

This IOC detects the presence of hidden file inside /etc directory. Malware use this technique to hide their presence on the infected system. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1564.001.

linux

SUSPICIOUS LATERAL MOVEMENT LINUX

This IOC detects lateral movement activity using server message block (SMB) and different utilities. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement, Defense Evasion, Persistence, Privilege and Technique(s): T1078, T1021.002, T1550.002.

linux

SUSPICIOUS LOADING OF KERNEL MODULES

This IOC detects the usage of tools like kmod and insmod to insert a module into kernel, Attackers often use this technique for persistence and installing rootkits. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and echnique(s): T1547.006.

linux

SUSPICIOUS LOGIN ATTEMPT TO DEFAULT ACCOUNTS

This IOC detects suspicious login attempt using pre-configured non-user accounts on a host. Such accounts are often used by installed services, but due to misconfiguration, allow remote access to the host. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege Escalation, Initial Access and Technique(s): T1078.001.

linux

SUSPICIOUS LOGIN ATTEMPT TO DOMAIN ACCOUNTS

This IOC detects login attempt to domain accounts. This is associated with MITRE ATT&CK

Technique(s): T1078.002.

linux

SUSPICIOUS OPENSSL USAGE LINUX

This IOC detects the use of openssl utility. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1140, T1222.002, T1070.004,

linux

SUSPICIOUS PACKAGE MANAGER INVOCATION

Attackers sometimes use yum to install packages stored locally. Kindly investigate the source of activity to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1547.006.

linux

SUSPICIOUS PROCESS

This IOC detects the suspicious listing of details of all running process details. This is

linux

SUSPICIOUS SHELL EXECUTION

This IOC looks for suspicious invocation of bash shell. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

SUSPICIOUS SHELL PROCESS (METHODOLOGY)

Adversaries may abuse shell commands and scripts for malware execution and post- infection activities. This IOC detects indicators associated with shell processes spawned by suspicious process. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

linux

SUSPICIOUS SINGLE CHARACTER FILE NAMES

This IOC detects single character file names which are usually used by attackers to obscure the purpose of a binary. Kindly investigate the file to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.005.

linux

SUSPICIOUS SUDO OPERATIONS

(METHODOLOGY)

This IOC detects various indicators associated with misuse of sudo for privilege escalation. This is associated with MITRE ATT&CK (r) Tactic(s): Privilege Escalation, Defense Evasion,

linux

SUSPICIOUS USAGE OF TRUNCATE COMMAND

(METHODOLOGY)

This IOC detects the suspicious usage of truncate command. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.002.

linux

SYSTEM INFORMATION DISCOVERY

(METHODOLOGY)

Attackers may discover various system information to guide them in the next phases of their attack. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and

linux

SYSTEM USER DISCOVERY LINUX (METHODOLOGY)

This IOC detects an adversary attempting to use built in commands to identify users logged in on a host and get details of user activity. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1033, T1059.004.

linux

SYSTEMD TIMERS (METHODOLOGY)

Systemd timers can be used by adversaries to establish persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1053.006.

linux

TAMPERING BASH HISTORY A LINUX (METHODOLOGY)

The .bash_history file contains previously executed commands via the command-line after exiting the shell. Adversaries might clear the contents of the file as a method for hiding their tracks on a system. Adversaries may insert, delete, or manipulate the data in order to manipulate external outcomes or hide activity. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Defense Evasion, Impact, Collection, Credential Access and

linux

TAMPERING BASH HISTORY LINUX (METHODOLOGY)

When commands are executed via the command-line, they are stored in the session's history. Running history command with -w writes the current history list in memory to the bash history file on disk. It does not append new entries but overwrites the complete file. Therefore running this command in conjunction with the clear command effectively clears the bash history file on disk as well. This is associated with MITRE ATT&CK (r) Tactic(s):

linux

TAMPERING BASH LOGOUT LINUX (METHODOLOGY)

When a login shell exits, bash reads and executes commands from .bash_logout file. Adversaries may insert, delete, or manipulate the data in order to manipulate external outcomes or hide activity. This technique is generally used to clear the command history of the session. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Defense Evasion, Impact and Technique(s): T1059.004, T1070.003, T1565.001.

linux

TAMPERING SUDOERS LINUX (METHODOLOGY)

Attackers often try to view the contents of /etc/sudoers file in search of bad configuration that can be abused to get privilege escalation or edit the contents of /etc/sudoers file to run programs with elevated permissions without password prompts. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s):

linux

TAMPERING WITH SSH FILES LINUX (METHODOLOGY)

Adversaries may modify SSH files directly with scripts or shell commands to add their own adversary-supplied public keys. This ensures that an adversary possessing the corresponding private key may log in as an existing user via SSH. This IOC detects the operations like access, modification, etc. on such files. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Credential Access, Execution, Persistence and Technique(s): T1005, T1059.004, T1098.004, T1552.004.

linux

TOUCH (UTILITY)

Touch is a linux utility that can be used to change the file timestamps, this is usually done by attackers as an anti-forensic technique. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.006.

linux

TRAP (UTILITY)

Adversaries may use trap command to execute malware upon receiving a particular interrupt signal. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege

linux

TRUNCATE (UTILITY)

TRUNCATE is a utility that allows to shrink or extend the size of a file to a given size. This is

linux

USERADD LINUX (UTILITY)

Useradd is a utility for adding users or for updating default new user information. Attackers can use this to create new users with high privileges. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence and Technique(s): T1059.004, 1136.001.

linux

VSFTPD COMMAND EXECUTION

(METHODOLOGY)

This IOC detects execution of VSFTPD utility. It is the Very Secure File Transfer Protocol Daemon. This is associated with MITRE ATT&CK (r) Tactic(s): Exfiltration and Technique(s) : T1048.003. .

linux

WEBSHELL ACTIVITY (METHODOLOGY)

This IOC detects suspicious commands being executed by possible web server accounts which can be indicative of webshell interaction. Kindly investigate the process that is being launched to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence and Technique(s): T1505.003.

linux

WGET INSECURE EXECUTION LINUX (METHODOLOGY)

Wget is a tool to transfer data from or to a server, using various protocols. Although wget can be used for benign operations, source endpoints should be investigated if there is no authorized use of wget to work in insecure mode in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1059.004, T1564.

linux

WGET SILENT EXECUTION LINUX (METHODOLOGY)

Wget is a tool to transfer data from or to a server, using various protocols. Although wget can be used for benign operations, source endpoints should be investigated if there is no authorized use of wget to work in silent mode in the environment. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1059.004, T1564.

linux

ADMIN USER CREATION OSX (METHODOLOGY)

This IOC detects a threat actor attempting to create an account on a compromised host using dscl, the Directory Service command line utility tool. Threat actors will create local or domain accounts as a persistence mechanism. Adversaries commonly give these accounts access to remote access tools, such as VPN, to allow remote access to a network.

Additionally, threat actors might also attempt to provide these accounts with elevated privileges to perform a variety of other commands on the compromised host. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution, Persistence and

Technique(s): T1059.004, T1087.001, T1136.001.

osx

APPLESCRIPT EXECUTION OSX (METHODOLOGY)

AppleScript is a scripting language developed by Apple as a means for automating tasks on a macOS device. Typically, these scripts serve to complete Administrative tasks, but adversaries can leverage the scripts to execute malicious code and even move laterally across a network. This IOC detects the usage of Script Editor to execute AppleScripts. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.002.

osx

ARCHIVE WITH SSH FILES OSX (METHODOLOGY)

This IOC detects an adversary enumerating and gathering all ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r)

Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004.

osx

AUTOMATIC LOGIN PASSWORD EXTRACTION

OSX (METHODOLOGY)

This IOC detects the extraction of the plaintext password of any user on the Mac device with autologin enabled. Automatic login removes the need for a user to enter in their credentials after startup. This is associated with MITRE ATT&CK (r) Tactic(s): Credential

Access, Discovery, Execution and Technique(s): T1003.008, T1059.004, T1087.001.

osx

CHECK FOR AUTOMATIC LOGIN OSX

(METHODOLOGY)

This IOC detects an adversary trying to check a compromised system for automatic login. Automatic login allows a user to bypass entering their credentials for login after booting up the machine. Instead, the device automatically boots to the desktop. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

osx

DISABLED APPLICATION FIREWALL OSX

(METHODOLOGY)

The firewall allows users to control what inbound connections are granted on the device. This IOC detects the disabling of the built-in application firewall on macOS endpoints. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence,

osx

DISABLED FIND MY MAC OSX (METHODOLOGY)

This IOC detects the modification of the plist file related to Find My Mac application, which contains the details of whether Find My Mac should be enabled on the machine or not. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation and Technique(s): T1059.004, T1547.011, T1562.001.

osx

DISABLED GATEKEEPER A OSX (METHODOLOGY)

Gatekeeper ensures that only trusted software from trusted sources executes on a Mac. Files downloaded from the Internet are placed in a quarantine area until it is confirmed by the user whether to proceed with the execution or not. This IOC detects disabling of Gatekeeper technology. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion, Execution and Technique(s): T1059.004, T1553.001, T1562.001.

osx

DISABLED GATEKEEPER OSX (METHODOLOGY)

Gatekeeper ensures that only trusted software from trusted sources executes on a Mac. Files downloaded from the Internet are placed in a quarantine area until it is confirmed by the user whether to proceed with the execution or not. This IOC detects disabling of Gatekeeper technology. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation and Technique(s): T1059.004,

T1547.011, T1553.001, T1562.001.

osx

DISABLED MALWARE REMOVAL TOOL OSX

MRT, short for Malware Removal Tool, is part of Apple's security features which removes malware from the machine. MRT works alongside XProtect to remove any malware that XProtect discovers. This IOC detects the disabling of MRT on a macOS device. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s):

osx

DISABLED SYSTEM

INTEGRITY PROTECTION OSX (METHODOLOGY)

This IOC detects an attempt to disable System Integrity Protection (SIP) on a macOS device.

SIP is one of Apple's built-in security features on macOS devices, starting with OS X El Captain. SIP's goal is to protect specific files and folders on the device from being modified by malware. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1059.004, T1562.001.

osx

DISABLED XPROTECT UPDATES OSX

XProtect is one of Apple's anti-malware protection methods and is part of the File Quarantine feature which quarantines and checks files downloaded from various sources on the Internet. This IOC detects the disabling of updates to XProtect on a macOS device. This IOC detects the modification of the plist file related to Find My Mac application, which contains the details of whether Find My Mac should be enabled on the machine or not. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation and Technique(s): T1059.004, T1547.011, T1562.001.

osx

EMAIL ADDRESS COLLECTION OSX

This IOC detects an adversary attempting to collect the email addresses stored within Apple's default email client, Mail. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004, T1114.001.

osx

ENABLE REMOTE DESKTOP OSX (METHODOLOGY)

This IOC detects when kickstart, a built-in command-line utility tool, is used to enable Apple Remote Desktop. Remote Desktop Sharing allows for Mac users to share their screen with other individuals and even let others control the device. While typically used for Administrative tasks, this can be leveraged for performing malicious activity. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and Technique(s): T1059.004, T1219.

osx

ENUMERATION OF AIRPORT PREFERENCES OSX

This IOC detects the enumeration of the wireless preferences on a compromised machine. Property list files contain configuration settings and preferences for applications and other utilities on a Mac. These files are stored in either XML or binary form, both of which can be read using the built in utility tool plutil. This is associated with MITRE ATT&CK (r) Tactic(s):

osx

ENUMERATION OF LOCAL ADMINS OSX (METHODOLOGY)

This IOC detects a threat actor trying to enumerate users of the local Admin group on a compromised machine using dscl, the built in directory service command line utility tool. Adversaries seek to identify and access user accounts and permission groups that have the highest levels of access to an environment or access to high value systems and data. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.004, T1069.001, T1087.001.

osx

ENUMERATION OF PATHS PROTECTED BY SIP OSX

(METHODOLOGY)

This IOC detects the enumeration of all directory paths protected by System Integrity Protection (SIP) on macOS devices. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.004, T1083.

osx

ENUMERATION OF SSH FILES OSX (METHODOLOGY)

This IOC detects an adversary enumerating all ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004.

osx

ENUMERATION OF SYSTEM INFORMATION OSX

(METHODOLOGY)

Various native built-in commands can be executed to pull back a variety of information including software version, firewall settings, and network connections. This IOC detects the gathering of basic system information from a macOS machine. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016, T1033, T1049, T1059.004, T1082, T1087.001, T1087.002.

osx

ENUMERATION OF WIRELESS NETWORKS OSX

(METHODOLOGY)

This IOC detects the enumeration of available wireless networks on a macOS device to extract the name, security settings, and other related information. This is associated with- MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016, T1059.004.

osx

EXFILTRATION OF SSH FILES OSX (METHODOLOGY)

This IOC detects exfiltration of ssh keys and files located on a compromised device. SSH keys consist of a public and private key that are used to authenticate with the SSH server. Adversaries can gather these keys and attempt to log in to the server to move laterally in a network. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004.

osx

GETSHELL VARIANT

(BACKDOOR)

This is a methodology IOC to search for a new variant of the OS X Getshell backdoor. Tested samples provided a reverse shell to destination port 4444.

osx

HIDDEN USER CREATION OSX (METHODOLOGY)

Adversaries can create local or domain accounts as a persistence mechanism. As a way to avoid detection, threat actors can also hide these accounts so that they do not appear at the login screen. This IOC detects a threat actor attempting to create a hidden user account on a Mac in a compromised environment. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence and Technique(s): T1059.004, T1136.001, T1564.002.

osx

hosts file modified (OSX)

Detects modification of the "hosts" file. The host file is often use to sinkhole network communications for security products. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

osx

KEYCHAIN COLLECTION OSX (METHODOLOGY)

This IOC detects the enumeration and collection of keychains on a compromised Mac. Mac devices use keychains as its built-in method for maintaining credentials for users and other services on the device. To access these keychains, a person must have the master login keychain password. If a person has not changed their keychain password, it will be the same as the credentials they use to log into the device. If an adversary obtained access to the keychain password, they could then access all of the other credentials stored in the keychain. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Credential Access, Execution and Technique(s): T1005, T1059.004, T1555.001.

osx

LOCAL USER GROUP DISCOVERY OSX

This IOC detects a threat actor attempting to discover groups on a compromised Mac host by using the dscacheutil command line utility tool. Groups provide a means for managing multiple users with the same level of privileges. Adversaries can use this information to determine which groups and accounts to target to acquire elevated privileges. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.004, T1069.001.

osx

MESSAGES COLLECTION OSX (METHODOLOGY)

This IOC detects an adversary attempting to gather additional information on a compromised Mac via Messages. Messages allow Mac users to send iMessages from their computer to any other system that uses iMessage. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1005, T1059.004.

osx

MODIFICATION OF BASH PROFILE OSX

When a user logs into the system, .bash_profile is executed after credentials are entered in successfully. If the full file path to a script is added to this file, that script will be executed as well. Adversaries can reference malicious scripts in .bash_profile as a technique for maintaining persistence on the machine. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1059.004, T1546.004.

osx

MODIFICATION OF BASHRC FILE OSX (METHODOLOGY)

When a user spawns a new interactive, non-login shell, then .bashrc file is executed. If the full file path to a script is added to this file, that script will be executed as well. Adversaries can reference malicious scripts in .bashrc as a technique for maintaining persistence on the machine. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1059.004, T1546.004.

osx

MODIFICATION OF SUDOERS FILE (METHODOLOGY)

The /etc/sudoers file contains the users that have SUDO elevated permissions. Any modifications to this file should be validated as attackers can add their current user to this file to maintain elevated privileges to a compromised system. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Privilege Escalation, Defense Evasion and Technique(s): T1059.004, T1548.003.

osx

MODIFICATION OF SUDOERS FILE A OSX (METHODOLOGY)

This IOC detects a privilege escalation technique which is achieved by making edits to the sudoers file. The /etc/sudoers file contains the users that have SUDO elevated permissions. This specific file provides information on who can run specific commands as well as who can run commands as another user or group. Adversaries can use this technique to their advantage to run commands or processes at a higher privilege. Any modifications to this file should be validated as attackers can add their current user to this file to maintain elevated privileges to a compromised system. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Privilege Escalation and Technique(s): T1059.004, T1548.003.

osx

MOKES (FAMILY)

MOKES is a cross-platform backdoor capable of functioning on all major operating systems.

It can steal data, execute arbitrary commands, and communicate using encrypted C2 channels.

osx

NETCAT BIND SHELL OSX (METHODOLOGY)

This IOC detects the abuse of netcat to create a bind shell using the listener flag on a specific port. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

osx

OFFICE APPLICATION SHELL EXECUTION

(METHODOLOGY)

This alert looks for Office applications launching shell processes. The arguments of these processes should be analyzed to determine if the activity is malicious. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.003.

osx

OSASCRIPT EXECUTION OSX (METHODOLOGY)

AppleScript is a scripting language developed by Apple as a means for automating tasks on a macOS device. Typically, these scripts serve to complete Administrative tasks, but adversaries can leverage the scripts to execute malicious code and even move laterally across a network. AppleScripts can be executed by using the osascript utility. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.002, T1059.004.

osx

PASSWORD POLICY DISCOVERY OSX

This IOC detects an adversary trying to discover the password policy on a macOS device. Adversaries can use this information to their advantage to set up their password lists to contain passwords that fulfill all of the requirements outlined in the policy. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.004, T1201.

osx

PHISHING WITH APPLESCRIPT OSX

Attackers can leverage AppleScript to create a fake password prompt on a compromised host as a method for collecting credentials. If a user falls for the technique and enters in their password, the password is returned to the shell that initially executed the script. Similar legitimate prompts appear when an executed program requires additional privileges to perform its tasks. Adversaries can easily mimic this activity by creating a simple AppleScript to collect other credentials to use at a later time. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Credential Access, Execution, Lateral Movement and Technique(s): T1056.002, T1059.002, T1059.004, T1534.

osx

PLIST DISGUISED AS SYSTEM LAUNCHAGENT

LaunchAgents on macOS are .plist files in which the services and components to be run are stored.The preference files generally follow the standard reverse domain naming system. Malware authors, in an attempt to avoid suspicion, name the plist files as com.apple. Genuine com.apple files exist in System folder but not in user folders. Investigate the files identified by this IOC to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege Escalation and Technique(s): T1036.005, T1543.001, T1547.011.

osx

POTENTIAL BASH REVERSE SHELL OSX (METHODOLOGY)

This IOC detects the reverse shell written in bash commands. Kindly investigate the source of the activity to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004.

osx

SAFARI PLIST ACCESS (METHODOLOGY)

This IOC detects safari protected folder access using plutil. This folder contains useful information on user browsing history. This is associated with MITRE ATT&CK (r) Tactic(s): Collection,Defense Evasion, Persistence, Privilege Escalation, Initial Access and Technique(s): T1114,T1078.

osx

SCRIPT APP EXECUTION OSX (METHODOLOGY)

AppleScript is a scripting language developed by Apple as a means for automating tasks on a macOS device. Typically, these scripts serve to complete Administrative tasks, but adversaries can leverage the scripts to execute malicious code and even move laterally across a network. Apple's Script Editor can be used to create an app with an embedded script. This IOC detects the execution of such Script applications, commonly known as applets. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s):

T1059.002.

osx

SECURITY TOOLS DISCOVERY (METHODOLOGY)

This IOC detects discovery of a system for known security software. Attacker may use this information to decide about further infection chain. This is associated with MITRE ATT&CK

(r) Tactic(s): Discovery and Technique(s): T1518.001,T1518.

osx

SSH KEY PERSISTENCE (METHODOLOGY)

This alert looks for the manual addition of SSH keys into the authorized_keys file. This has been used by attackers to maintain SSH access to a compromised system. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence and Technique(s): T1098.004

osx

SUSPICIOUS LAUNCHAGENT (METHODOLOGY)

LaunchAgents on macOS are .plist files in which the services and components to be run are stored.The preference files generally follow the standard reverse domain naming system. It begins with the company name, followed by an application identifier, and ends with the property list file extension. The launchagents generated by malware do not follow this naming system most of the time. Investigate the files identified by this IOC to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.001, T1547.011.

osx

SUSPICIOUS LAUNCHCTL USAGE OSX

Launchctl interacts directly with launchd to load and unload daemons and agents on macOS devices. These daemons and agents each have a property list file which contains configuration and properties about each process. Adversaries can take advantage of property list keys and values to execute malicious scripts on a compromised device. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.004,

T1569.001.

osx

SUSPICIOUS OPENSSL

This IOC detects the use of openssl utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Execution and Technique(s): T1140, T1222.002, T1070.004, T1059.004, T1132.001.

osx

SUSPICIOUS SCREENCAPTURE OSX

(METHODOLOGY)

On OSX, the native command screencapture can be used to capture images from the screen and save them to a file. These files are saved to /tmp/ directory by some malware to avoid suspicion, which are later exfiltrated. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Execution and Technique(s): T1059.004, T1113.

osx

USER ACCOUNT ENUMERATION A OSX

(METHODOLOGY)

This IOC detects the usage of dscl command to extract all local user accounts on the system. Dscl, the "Directory Service command line utility", allows a user to read, write, and manage Directory Service data on the local system directory. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1033, T1059.004, T1087.001.

osx

USER ACCOUNT ENUMERATION B OSX

(METHODOLOGY)

This IOC detects the usage of plutil command to extract specific user information on a compromised machine. Plutil, the "property list utility", allows a user to read and write property list files. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution

and Technique(s): T1033, T1059.004, T1087.001.

osx

USER ACCOUNT ENUMERATION OSX (METHODOLOGY)

This IOC detects the usage of dscacheutil command to extract all local system accounts. Dscacheutil, the "Directory Service Cache" utility, allows a user to gather statistics, initiate lookups, inspection, cache flush, among other tasks on the local system. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1033, T1059.004,

T1087.001.

osx

7-zip archive created

Detects creation of 7-zip archive, based on file signature. This is associated with MITRE

ATT&CK (r) Tactic(s): Collection and Technique(s): T1074.001, T1560.

win

7zip execution

Detects the execution of the 7-zip utility, based on file name. This is associated with MITRE

ATT&CK (r) Tactic(s): Collection and Technique(s): T1074.001, T1560.

win

Accessibility features child process (METHODOLOGY)

Detects child processes of common Windows accessibility features, which may indicate a "stickykeys"-type accessibility features replacement attack. This is associated with MITRE

ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1546.008.

win

Accessibility features file write

Detects writes to Windows accessibility files, which may indicate an attack. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and

Technique(s): T1546.008.

win

ACCOUNT ACTIVATION USING NET UTILITY

This IOC detects an attempt to activate an inactive account such as Guest or Administrator using net utility. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence and Technique(s): T1136.001.

win

ADFIND (UTILITY)

Attackers may use AdFind tool to do Active Directory reconnaissance. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1087.002, T1482, T1069.002, T1018, T1016.

win

ADIDNSDUMP (UTILITY)

ADIDNSDUMP is a tool that enables enumeration and exporting of all DNS records. This IOC detects activity coming from ADIDNSDUMP. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1018.

win

ADS Code Exec (Methodology)

Identifies code execution from alternate data streams, including using wmic to run EXEs, rundll32 to run DLLs, script hosts loading script code, regsvr32.exe loading scriptlet, mshta.exe loading HTAs. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1564.004.

win

ADS ESC8(METHODOLOGY)

AD CS is a server role that functions as Microsoft public key infrastructure (PKI) implementation but ADCS web enrollments endpoints are vulnerable to NTLM relay attacks.Using NTLM relay, an attacker can impersonate an inbound-NTLM-authenticating victim user accessing the web interfaces and can request a client authentication certificate.This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Collection

and Technique(s): T1557.001.

win

ADS Process Activity

Looks for activity by processes running from NTFS Alternate Data Streams (ADS). This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1564.004.

win

ADSLDP.DLL LOAD

(METHODOLOGY)

This looks for any process loading ADSLP.dll which can be indicative of AD reconaissance.

This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

APACHE STRUTS 2 RCE CVE- 2017-5638 (EXPLOIT)

CVE-2017-5638 can enable remote code execution on a server running a vulnerable version of Apache Struts. The vulnerability exists in the Jakarta Multipart parser due to improper handling of the Content-Type header. An attacker can use malicious OGNL in Content-Type header to trigger this vulnerability, and then execute the system command leading to RCE. This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access and Technique(s): T1190.

win

APLIB (UTILITY)

aPLib is a compression utility that can be used by attackers to compress collected data prior to exfiltration. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and

Technique(s): T1560.001.

win

Arp execution

Detects execution of the Windows arp command. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1016.

win

ATTRIB COMMAND EXECUTION

This IOC detects execution of attrib command. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1564.001.

win

Automated Collection

Identifies possible output files from CMD commands. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1119.

win

AUTORUN.INF FILE CREATION (METHODOLOGY)

This IOC looks for any process writing to autorun.inf in a root directory. This is used by various malware to infect air gapped machines. This is associated with MITRE ATT&CK (r)

Tactic(s): Command And Control and Technique(s): T1092.

win

BAT script execution

Identifies Window batch script (BAT) execution. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution and Technique(s): T1059.003.

win

BCDEDIT CHANGE SAFEBOOT OPTIONS

(METHODOLOGY)

This IOC detects the modification of safeboot value using bcdedit utility. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

win

BCDEDIT RECOVERY VALUE CHANGE (METHODOLOGY)

This IOC detects the modification of recoveryenabled value which will prevent the system from being able to boot into the Windows Recovery. This is associated with MITRE ATT&CK

(r) Tactic(s): Impact and Technique(s): T1490.

win

BCDEDIT USAGE (UTILITY)

BCDEDIT is a command-line tool that can be used by attackers for managing the Boot Configuration Data (BCD). This is associated with MITRE ATT&CK (r) Tactic(s): Impact and

Technique(s): T1490.

win

Bitsadmin Execution

Identifies execution of the Windows Bitsadmin utility. This is associated with MITRE

win

CAB File Creation

Identifies creation of Microsoft Cabinet (CAB) files by extension. This is associated with

MITRE ATT&CK (r) Tactic(s): Collection, Defense Evasion and Technique(s): T1074.001, T1140, T1560.

win

CAB File Masquerade

Identifies Microsoft Cabinet (CAB) files by content, where the extension is not .cab. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Defense Evasion and Technique(s):

T1036.005, T1074.001, T1140, T1560.

win

CARBANAK CONFIG FILE (BACKDOOR)

This alert looks for a config file created when the CARBANAK backdoor is successfully installed. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and

Technique(s): T1105.

win

CARBANAK TAKEOUT (BACKDOOR)

TAKEOUT is a PowerShell loader that contains base64 encoded and compressed data which is a PE file that is loaded into memory and executed. It has been observed loading at least two malware families related to FIN7. This alert looks for the creation of both the initial encoded PowerShell script and the second stage deobfuscated PowerShell script in

%AppData%. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Defense Evasion and Technique(s): T1059.001, T1140.

win

Certutil Decode

Identifies use of certutil to decode file content. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion and Technique(s): T1140.

win

CERTUTIL DECODE B (METHODOLOGY)

Certutil.exe is a native Windows binary that is part of the built-in Certificate Services. It has been used by attackers to natively encoded/decode base64 data. This alert also looks for certutil.exe -decode or -decodehex arguments in process and registry events used to decode encoded payloads often stored in fake certificate formats. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1140.

win

Certutil execution

Detects execution of the Windows utility certutil, which is often used by attackers to encode/decode data, and to surreptitiously download data. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s): T1105,

T1140, T1553.004.

win

Certutil File Write

Identifies file written by the Windows certutil.exe utility, which may be used to decode files or data. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s): T1105, T1140, T1553.004.

win

CHROME PASSWORD STEALING

This IOC looks for Login Data and Web Data files being created by non-chrome processes, these are files where chrome stores saved logins and saved credit card info; attackers sometimes creates copies of these files for exfiltration or offline decryption. This is

associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1555.003.

win

CLR IN SEARCHPROTOCOLHOST

This IOC looks for indicators of .NET code loaded in searchprotocolhost.exe, this could be an indication of searchprotocolhost.exe being used for injection purposes. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and

Technique(s): T1055.

win

CLR IN WERFAULT (METHODOLOGY)

This IOC looks for indicators of .NET code loaded in werfault.exe, this could be an indication of werfault,exe being used for injection purposes. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1055.

win

CMD Child Process

Identifies processes spawned by cmd.exe, indicating usage of the command line interface.

This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.003.

win

CMD Execution

Identified execution of the Windows command line interface, cmd.exe. This is associated

with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.003.

win

CMD file write

Detects files written by the Windows command-line processor, cmd.exe. This may identify copied files or output files. This is associated with MITRE ATT&CK (r) Tactic(s): Command

And Control, Execution and Technique(s): T1059.003, T1105.

win

CMD NETWORK CONNECTION

Detects network connections from the CMD process. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and Technique(s): T1059.003,

T1071.001, T1105.

win

CMD script execution

Identifies CMD script execution. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.003.

win

CMD URL REQUEST

Detects URL requests from CMD. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control, Execution and Technique(s): T1059.003, T1071.001, T1105.

win

COM CLSID registry activity (METHODOLOGY)

Detects changes to Windows Component Object Model Class ID (clsid) registry persistence keys. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence,

Privilege Escalation and Technique(s): T1112, T1546.015.

win

COM Hijacking

Identifies COM hijacking by writing to HKCU or HKU registry hives. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege Escalation and Technique(s): T1112, T1546.015.

win

COM Object Change

Identifies changes to HKLM COM objects. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege Escalation and Technique(s): T1112, T1546.015.

win

COMMANDLINE CHECKING CAPABLITY SID

(METHODOLOGY)

All Capability SIDs that the operating system is aware of are stored in the Windows Registry in the path SOFTWARE\Microsoft\SecurityManager\CapabilityClasses\AllCachedCapabilities'.Attackers may leverage the registry key to extract some useful information from the system, granting a Windows component, access to varioous resources or delete some known SID's for its advantage.This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1134.005.

win

Comspec Registry (METHODOLOGY)

Detects the Windows environment variable %comspec% in Windows registry persistence locations. This may be indicative of malicious lateral movement or persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation and Technique(s): T1059.003, T1112, T1543.003, T1547.001, T1569.002.

win

CONTROL PANEL ITEMS (METHODOLOGY)

Windows Control Panel items are utilities that allow users to view and adjust computer settings. Control Panel items are registered executable (.exe) or Control Panel (.cpl) files, the latter are actually renamed dynamic-link library (.dll) files that export a CPlApplet function. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1218.002.

win

CONTROL PANEL ITEMS A (METHODOLOGY)

Windows Control Panel items are utilities that allow users to view and adjust computer settings. Control Panel items are registered executable (.exe) or Control Panel (.cpl) files, the latter are actually renamed dynamic-link library (.dll) files that export a CPlApplet function. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1218.002.

win

Copy/Move command

Detects copy commands based on process arguments. Will not detect copy commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Command And

Control and Technique(s): T1074.001, T1105.

win

CREATING SHORTCUT VIA COMMANDLINE

(METHODOLOGY)

This IOC detects the creation of the shortcut file via Windows commandline to the target path in the 'Start Menu\Programs\Startup' directory. Attackers can use this technique to attain persistence causing the program to execute when a user logs in.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s):

T1547.001, T1547.002.

win

Credential Search

Identifies searching for credentials based on process arguments. This is associated with

MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1552.001.

win

CSC.EXE EXECUTION

(METHODOLOGY)

This IOC detects the execution of C# compiler csc.exe. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1027.004.

win

Cscript execution

Detects execution of the Windows script host. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution and Technique(s): T1059.005, T1059.007.

win

Cscript/Wscript Child

Process

Identifies processes spawned by cscript and wscript. This is associated with MITRE ATT&CK

(r) Tactic(s): Execution and Technique(s): T1059.005, T1059.007.

win

CSVDE EXECUTION (METHODOLOGY)

csvde.exe is a tool that can be used to import and export data from Active Directory Domain Services (AD DS). This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1069.002, T1087.002.

win

CURL EXECUTION

(METHODOLOGY)

This IOC detects execution of cURL utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Command And Control and Technique(s): T1071.001.

win

DATA COMPRESSION USING POWERSHELL

(METHODOLOGY)

Detects use of PowerShell cmdlet to archive from specified files and directories. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1560.

win

Data staging

Identifies file writes to locations that may be used by attackers for staging data. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1047.

win

DCOM RPC traffic

Detects Distributed Component Object Model (DCOM) Remote Procedure Call (RPC) traffic based on network port. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement and Technique(s): T1021.003, T1559.001.

win

DEFAULT NETWORK SHARES (METHODOLOGY)

Adversaries often use network shares for lateral movement. This is a low fidelity IOC to check for presence of files and execution of files from default network shares like admin$, c$, ipc$. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.002, T1570.

win

Del command

Detects Windows delete commands based on process arguments. Will not detect delete commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.004.

win

DESKTOPIMGDOWNLDR (UTILITY)

DesktopImgDownldr is a benign windows binary that can be abused by adversaries to download payloads. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion,

Persistence, Execution and Technique(s): T1197, T1559.001.

win

Dir Command Output

File containing output from the "dir" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1083.

win

Directory listing command

Detects Windows directory listing commands based on process arguments. Will not detect commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery,

Execution and Technique(s): T1047, T1059.001, T1059.003, T1083.

win

DISABLING WINDOWS IIS HTTP LOGGING

(METHODOLOGY)

Detects suspicious disabling of Windows IIS HTTP Logging via AppCmd.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.002.

win

DLL SEARCH ORDER HIJACKING

(METHODOLOGY)

Adversaries may execute their own malicious payloads by hijacking the search order used to load DLLs. We must enable Safe DLL Search Mode to force search for system DLLs in directories with greater restrictions.However attackers may try to disable the associated registry key to exploit the technique.This is associated with MITRE ATT&CK (r) Tactic(s):

Persistence, Privilege Escalation, Defense Evasion and Technique(s): T1574.001.

win

DLL SEARCH ORDER HIJACKING BY FIN7

This IOC detects known DLLs observed in FIN7 attack which got loaded via Dll Search Order Hijacking technique. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence,

Privilege Escalation, Defense Evasion and Technique(s): T1574.001

win

DOMAIN SYSTEMS IDENTIFICATION WITH

NET.EXE (METHODOLOGY)

This IOC detects the use of net.exe utility to identify remote systems within a domain group. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s):

T1018.

win

DRIVERQUERY USAGE (UTILITY)

DriverQuery is a utility that can be used to display a list of installed device drivers and their properties. This is associated with MITRE ATT&CK (r) Tactic(s): Reconnaissance and

Technique(s): T1592.001.

win

Dsquery execution

Detects execution of the Windows dsquery utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1069.002, T1087.002, T1018.

win

Echo command execution

Detects Windows "echo" commands based on process arguments. Will not detect echo commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1087.001.

win

ECHO TO NAMED PIPE

(METHODOLOGY)

Adversaries may used named pipes for communication. This is associated with MITRE

ATT&CK (r) Tactic(s): Command and Control and Technique(s): T1105, T1090.001.

win

Email collection

Identifies email enumeration and aggregation. This is associated with MITRE ATT&CK (r)

Tactic(s): Collection and Technique(s): T1114.001.

win

EMAIL SPEARPHISHING (METHODOLOGY)

This IOC detects execution of malicious files attached in the Email. This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access, Execution and Technique(s): T1566.001,

T1204.002

win

Empire SessionGopher

Identifies "invoke-sessiongopher" in process arguments. This is associated with MITRE

ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1552.004.

win

ENABLING RDP (METHODOLOGY)

Adversaries may enable remote desktop connections to login interactively. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral Movement and

Technique(s): T1562.001, T1021.001.

win

Encoded Clipboard

Identifies the word "clipboard" base64 encoded. This may be indicative of attempts to read the system clipboard. This is associated with MITRE ATT&CK (r) Tactic(s): Collection,

Command And Control and Technique(s): T1115, T1132.001.

win

Encoded VBScript File Created

Detects the creation of encoded VBScript files (VBE) by looking for the VBE magic header bytes (23 40 7E 5E). Files in this format may be used to obfuscate malicious VB scripts run via scripting interpreters such wscript and cscript. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Execution and Technique(s): T1027, T1059.005.

win

Encrypted 7zip Archive

Command

Identifies commands to create encrypted 7zip archives. This is associated with MITRE

ATT&CK (r) Tactic(s): Collection and Technique(s): T1074.001, T1560.

win

Encrypted RAR archive

command

Detects possible encrypted WinRAR archive creation based on process arguments. This is

associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1074.001, T1560.

win

ENUMERATE LOCAL USER ACCOUNTS VIA WMIC

(METHODLOGY)

This IOC detects the execution of a wmic command to list all local user accounts within a given system. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and

Technique(s): T1047.

win

ENUMERATING DOMAIN

TRUSTS (METHODOLOGY)

This IOC detects the attempt to gather information on domain trust relationships. This is

associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1482.

win

eventvwr process creation (METHODOLOGY)

Detects processes created by the Windows event log viewer, which may indicate the use a of User Account Control (UAC) bypass. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion, Privilege Escalation and Technique(s): T1548.002.

win

EVIL-WINRM (UTILITY)

Detects use of Evil-WinRM utility. Evil-WinRM is Windows Remote Management utility used by adversaries. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and

Technique(s): T1021.006.

win

EXECUTABLE DISGUISED AS

INF FILE (METHODOLOGY)

This IOC detects suspicious INF file which has executable file header. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1218.003.

win

Execution from suspicious

directory

Detects processes running from uncommon locations. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.005.

win

Execution from temp directory

Detects processes executing from Windows or user "temp" directories. These processes may warrant additional attention. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1036.005.

win

Execution From User

Directory

Identifies execution from user directories. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution and Technique(s): T1204.002.

win

Expand Execution

Identifies execution of the Windows expand.exe utility. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s): T1105,

T1140, T1564.004.

win

EXTRACTING SYSTEMINFO VIA REGISTRY

(METHODOLOGY)

An adversary may attempt to get detailed information about the operating system as they can query the HKLM\SYSTEM\CurrentControlSet\Services registry tree which stores information about each service on the system.This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1082.

win

FILE EXTENSION MASQUERADING

(METHODOLOGY)

This IOC detects file extension masquerading. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.003.

win

File Name Masquerade

Identifies files named to trick users about their type. This is frequently used in user execution attacks. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion,

Execution and Technique(s): T1036, T1204.002.

win

File Transfer Utility

Execution

Identifies use of file transfer utilities. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control and Technique(s): T1105.

win

File Transferred Over SMB

Identifies files transferred to the system using SMB. This is associated with MITRE ATT&CK

(r) Tactic(s): Command And Control, Lateral Movement and Technique(s): T1021.002,

T1105.

win

File write to named pipe

This IOC detects communications using named pipes to remote systems. Does not capture named pipe activity on the local system. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control and Technique(s): T1071.002, T1105.

win

File write to network share

Captures files written to remote network shares. This is associated with MITRE ATT&CK (r)

Tactic(s): Command And Control, Lateral Movement and Technique(s): T1105, T1570.

win

File write to root of recycle bin

Detects files written to the root of the recycle bin. All legitimate files should be written to a subfolder of the recycle bin. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1036.005.

win

FILE WRITE TO TEMP DIRECTORY

(METHODOLOGY)

This IOC looks for explorer creating files in Temp folder. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1105.

win

FILE WRITE TO WEBROOT DIRECTORIES

(METHODOLOGY)

This IOC loosely maps to Shared Webroot technique since it only looks for PHP file writes in default web root directories of popular windows web servers and does not guarantee that

the file write is from a remote system using a shared web root.

win

Findstr execution

Detects execution of the Windows "findstr" find string utility. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1083.

win

FIREEYE ENDPOINT AGENT SERVICE DISABLE

(METHODOLOGY)

IOC detects disabling of FireEye Endpoint Agent service. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

win

FIREFOX PASSWORD STEALING

This IOC looks for non-firefox processes loading the nss3.dll. This dll is loaded by password stealers to use apis exported by it to parse credentials in the file logins.json. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s):

T1555.003.

win

Fltmc execution

Detects execution of the Windows minifilter driver management utility, which can be used to list, load and unload minifilter drivers. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion, Discovery and Technique(s): T1518.001, T1562.001.

win

FSUTIL USAGE

(METHODOLOGY)

This IOC detects the suspicious usage of FSUTIL utility. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1120.

win

FTP network connection

Detects FTP connections based on common network ports. This is associated with MITRE

ATT&CK (r) Tactic(s): Command And Control, Credential Access, Discovery, Exfiltration and Technique(s): T1020, T1048.003, T1071.002, T1083, T1110.001.

win

FTP utility execution

Detects execution of the Windows FTP utility, based on process name. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion, Exfiltration and

Technique(s): T1048.003, T1105, T1202.

win

Getmac Execution

Identifies execution of the Windows getmac.exe utility. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1016.

win

GET-SMBSHARE

POWERSHELL COMMAND USAGE (METHODOLOGY)

Get-SmbShare powershell cmdlet retrieves objects that represent the Server Message Block (SMB) shares being displayed by the computer. This is associated with MITRE ATT&CK

(r) Tactic(s): Discovery and Technique(s): T1135.

win

GOOGLE CHROME BOOKMARK ENUMERATION USING TYPE UTILITY

(METHODOLOGY)

This IOC detects the possible enumeration of Google Chrome bookmarks using type utility. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1217.

win

GPRESULT (UTILITY)

Detects use of gpresult command. This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1069.001.

win

Group Enumerations

Identifies PowerShell Get-ADGroup and Get-ADGroupMember commands and WMI Win32_Group and Win32_GroupUser queries. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery, Execution and Technique(s): T1047, T1059.001, T1069.002.

win

GROUP POLICY METHODOLOGY

(METHODOLOGY)

Group policy allows for centralized management of user and computer settings in Active Directory (AD). Attackers uses the GPO modification to implement schedule tasks, disable security tools, sewrvice execution, etc. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion, Privilege Escalation and Technique(s): T1484.

win

GROUP POLICY MODIFICATION

(METHODOLOGY)

This IOC detects the group policy modification. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1484.001.

win

GSECDUMP (CREDENTIAL STEALER)

Gsecdump is a publicly-available tool used within a command-line interface to dump the Windows SAM database, cached domain credentials, LSA details and active logon sessions.This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access,Defense Evasion, Persistence, Privilege Escalation, Initial Access and Technique(s): T1003.002,

T1003.004, T1078.

win

HIDING DESKTOP ICONS THROUGH REGISTRY

(METHODOLOGY)

This IOC detects the suspicious commandline to hide or modify the desktop icons via the registry which can be used by attackers to simulate shortcut modification.This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s):

T1547.009.

win

HIGHEST PRIVILEGE SCHTASKS EXECUTION

(METHODOLOGY)

This IOC detects scheduled tasks being set to use highest privileges using schtasks. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and

Technique(s): T1053.005.

win

Host File Access

Identifies references to the Windows hosts file (%systemroot%\system32\Drivers\etc\hosts). This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1018.

win

Hostname Execution

Identifies execution of the Windows hostname.exe utility. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

hosts file modified (windows)

Detects modification of the "hosts" file. The host file is often use to sinkhole network communications for security products. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1562.001.

win

Icacls execution

Detects execution of the Windows icacls utility, which can be used to display or change Windows security descriptors. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1036.004, T1222.001.

win

IDENTIFYING WINDOWS GUID VIA REGISTRY

(METHODOLOGY)

This IOC detects the command to identify the Windows MachineGUID value for a system by the attackers. Upon execution, the machine GUID will be displayed from registry which is a unique identifier for a machine.This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1082.

win

INDICATOR BLOCKING (METHODOLOGY)

Attacker can block indicators or events typically captured by sensors from being gathered and analyzed. This could include maliciously redirecting or even disabling host-based sensors, such as Event Tracing for Windows (ETW),by tampering settings that control the collection and flow of event telemetry. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1562.006.

win

INDIRECT COMMAND EXECUTION

(METHODOLOGY)

This IOC detects execution of the Windows utilities such as forfiles and pcalua, which can be used for obfuscation and to break up parent/child process relationships. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Defense Evasion and Technique(s):

T1202, T1083.

win

INSTALLED SOFTWARE ENUMERATION

(METHODOLOGY)

This IOC detects execution of a WMIC command that provides a list of installed applications on a given host. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution

and Technique(s): T1047, T1518.001.

win

INTERACTIVE MALICIOUS POWERSHELL B

(METHODOLOGY)

This IOC looks for interactive (hands on keyboard) use of known bad PowerShell functions and suspicious command combinations.This is associated with MITRE ATT&CK (r) Tactic(s):

Execution, Defense Evasion and Technique(s): T1059.001, T1207, T1484.

win

INTERCEPTER EXECUTION

Intercepter is a console program that can be used to sniff network traffic. This is associated

with MITRE ATT&CK (r) Tactic(s): Credential Access, Discovery and Technique(s): T1040.

win

INTERCEPTER NG (UTILITY)

Intercepter NG is an utility which is used to perform man-in-the-middle attacks. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Discovery and Technique(s):

T1040.

win

INVOKE-WEB REQUEST COMMANDLINE

(METHODOLOGY)

The Invoke-WebRequest cmdlet sends HTTP and HTTPS requests to a web page or web service. It parses the response and returns collections of links, images, and other significant HTML elements.This is associated with MITRE ATT&CK (r) Tactic(s): Execution and

Technique(s): T1204.002, T1059.001.

win

Ipconfig command output

Detects output of the "ipconfig" utility being written to disk. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1016.

win

Ipconfig execution

Detects execution of the Windows ipconfig utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1016.

win

IWBEMSERVICES USAGE

(METHODOLOGY)

This IOC detects usage of IWbemServices interface to access WMI services. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1047.

win

JAVA ARCHIVE FILE MASQUERADING AS INSTALLER PACKAGE FILE

(EXPLOIT)

This IOC detects suspicious MSI file with a JAR data appended to the end. Such files can be used to exploit CVE-2020-1464 to bypass digital signature verification on windows. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1211,

T1553.002.

win

JOURNAL DELETION VIA

FSUTIL (METHODOLOGY)

This IOC detects deletion of active USN change journal using fsutil utility.This is associated

with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.

win

Kerberos Network Connection

Identifies Kerberos network connections based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion, Lateral Movement and

Technique(s): T1110.003, T1212, T1550.003, T1558.003.

win

Kerberos Ticket Creation

Identifies dumped kerberos tickets by extension. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion, Lateral Movement and Technique(s):

T1550.003, T1558.003.

win

KERBEROS TICKET FILE CREATION (METHODOLOGY)

This alert looks for Kerberos ticket contents written to disk. Some attackers have written Kerberos ticket information to disk as file names like 1.krb, 2.krb, etc. This alert focuses on the file header contents and a valid size range for Kerberos ticket information. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion, Lateral

Movement and Technique(s): T1550.003, T1558.003.

win

LAUNCHING MICROSOFT

EDGE (METHODOLOGY)

This IOC detects launnching of microsoft edge via commandline.This is associated with

MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1569.002.

win

Lazagne password stealer (Credential Stealer)

Detects execution of the Lazagne password stealer and Lazagne output being written to disk. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and

Technique(s): T1552.001, T1555.003.

win

LDAP Network Connection

Identifies Lightweight Directory Access Protocol (LDAP) network connections based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s):

T1110.002.

win

LISTING APPLICATIONS INSTALLED

(METHODOLOGY)

This IOC detects registry being queried to determine software and versions installed on the system. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s):

T1082.

win

LISTING OF BROWSER BOOKMARKS

(METHODOLOGY)

This IOC detects listing of browser bookmark files. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1217.

win

LOCAL PROXY MODIFICATION

(METHODOLOGY)

This IOC detects local proxy modification via windows registry. Attacker can modify the local proxy settings to maliciously tunnel their internet communication. This is associated

with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1112.

win

Local System Data

Identifies enumeration and aggregation commands associated with data theft from the local system. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and

Technique(s): T1005, T1119.

win

LOCKY RANSOMWARE (FAMILY)

Locky is ransomware. The main infection method is a Microsoft Word document with a malicious macro that is delivered as an email attachment. The macro runs a script to download and run Locky on the victim host. This is associated with MITRE ATT&CK (r)

Tactic(s): Impact and Technique(s): T1486.

win

LOLbin execution

Detects execution of numerous "living off the land" binaries - signed binaries used to launch arbitrary code, to bypass detection, application whitelisting and/or User Account Control. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege

Escalation and Technique(s): T1216.001, T1218.001, T1218.002, T1218.003, T1218.004, T1218.005, T1218.007, T1218.008, T1218.009, T1218.010, T1218.011,

T1548.002,T1127.001.

win

lsremora.dll import

(CREDENTIAL STEALER)

DLL used by Pwdump password stealer. This is associated with MITRE ATT&CK (r) Tactic(s):

Credential Access and Technique(s): T1003.005.

win

Makecab Execution

Identifies execution of the Windows makecab.exe utility, used to create Cabinet (CAB) archives. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s):

T1074.001, T1560.

win

MASQUERADING ACTIVITY

BY FIN7

This IOC detects known service and schedule task created in FIN7 attack. This is associated

with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.004

win

MESSAGE (UTILITY)

This IOC detects usage of msg utility. This utility is used to send a message to a user on Remote Desktop. A well-known threat actor Emotet seems to use this tool for displaying a fake message.This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Initial Access

and Technique(s): T1204,T1566.001,T1059.

win

Mimikatz Crypto Extract

Identifies Mimikatz crypto::extract commands. This is associated with MITRE ATT&CK (r)

Tactic(s): Credential Access and Technique(s): T1552.004.

win

Mimikatz Execution (CREDENTIAL STEALER)

Looks for command-line arguments and file contents associated with the Mimikatz credential-stealing and post-exploitation utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Credential Access and Technique(s): T1003.001, T1003.002, T1003.004.

win

Mimikatz Pass-The-Ticket

Identifies Mimikatz pass-the-ticket kerberos attacks by arguments. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral Movement and Technique(s):

T1550.003.

win

MININT REGISTRY KEY CREATION (METHODOLOGY)

This IOC detects creation of MiniNT registry key which would stop Windows from logging security events. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1112.

win

MMC Account Access

Identifies use of the Microsoft Management Console (mmc.exe) with the lusrmgr.msc snap- in to enumerate, create or modify user accounts in the Windows GUI. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Persistence and Technique(s): T1087.001,

T1136.001.

win

MMC Scheduled Task

Identifies use of the Microsoft Management Console (mmc.exe) with the taskschd.msc snap-in to enumerate, create or modify scheduled tasks. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s):

T1053.005.

win

mmc.exe DCOM activity

Identifies Distributed Component Object Model (DCOM) MMC20 process execution. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement and

Technique(s): T1021.003, T1559.001.

win

Mofcomp Execution

Identifies execution of the Windows Managed Object Format (MOF) compiler mofcomp.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence,

Privilege Escalation and Technique(s): T1047, T1546.003.

win

MSSQL Network Connection

Identifies Microsoft SQL database network connections based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Impact and Technique(s): T1110.002,

T1489.

win

MySQL Network Connection

Identifies network connections to MySQL databases based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Impact, Lateral Movement and Technique(s):

T1110.002, T1210, T1489.

win

Nbtscan Execution

Identifies execution of the nbtscan utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1016.

win

Nbtstat execution

Detects execution of the Windows nbtstat utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1016.

win

Net accounts command

execution

Detect execution of the "net accounts" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1201.

win

NET COMPUTER COMMAND EXECUTION

(METHODOLOGY)

This IOC detects the execution of net computer command. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1135.

win

Net config command

execution

Detects execution of the "net config" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1016, T1033, T1082.

win

Net group command

execution

Detects execution of the "net group" and "net localgroup" commands. This is associated

with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1069.002.

win

NET SERVICE STOP COMMAND EXECUTION

(METHODOLOGY)

This IOC detects execution of the "net stop" command. This is associated with MITRE ATT&CK (r) Tactic(s): Impact, Execution, Defense Evasion and Technique(s): T1489,

T1569.002, T1562.001.

win

Net session command

execution

Detects execution of the "net session" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1049.

win

Net Share Command

Execution

Identifies net share commands, used to list network shares. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1018, T1135.

win

Net start command

execution

Detects execution of the "net start" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery, Execution and Technique(s): T1007, T1569.002.

win

Net use command execution

Detects execution of "net use" command. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Discovery, Exfiltration, Initial Access, Lateral Movement, Persistence, Privilege Escalation and Technique(s): T1021.002, T1048.003, T1049,

T1078.002, T1135.

win

Net User Add

Identifies account creation using net user /add. This is associated with MITRE ATT&CK (r)

Tactic(s): Persistence and Technique(s): T1136.001.

win

Net user command

execution

Detects execution of the "net user" command. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery, Persistence and Technique(s): T1087.002, T1136.001.

win

NET USER COMMAND EXECUTION

(METHODOLOGY)

This IOC detects the execution of net user command. This is associated with MITRE ATT&CK

(r) Tactic(s): Impact, Persistence, Credential Access and Technique(s): T1531, T1078.001,

T1078.002, T1078.003, T1110.004, T1110.001.

win

NET USER DELETE

(METHODOLOGY)

This IOC detects the delection of a user account using net utility. This is associated with

MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1531.

win

Net View Command

Execution

Detects execution of "net view" commands. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1018, T1135.

win

Netsh execution

Detects execution of the Windows netsh utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Discovery and Technique(s): T1016, T1518.001, T1562.001.

win

Netsh Firewall Interaction

Looks for attacker's use of netsh to modify firewall settings/rules. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.004.

win

Netsh Interface Command

Identifies use of netsh to show network interface settings. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1016.

win

NETSH.EXE MALICIOUS HELPER OBJECT B

(METHODOLOGY)

Netsh contains functionality to add helper DLLs for extending its functionality. Once loaded, the DLL will be execute every time netsh is executed. This can be used by malware for persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege

Escalation and Technique(s): T1546.007.

win

Netstat execution

Detects execution of the Windows netstat utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1049.

win

Network connection from appdata

Looks not processes running from the "appdata" directory making an IPv4 network connection. Attackers frequently operate out of the appdata directory, so this may identify suspicious processes. Additional tuning will likely be needed within an enterprise environment. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control

and Technique(s): T1095.

win

Network connection from programdata

Looks not processes running from the "programdata" directory making an IPv4 network connection. Attackers frequently operate out of the programdata directory, so this may identify suspicious processes. Additional tuning will likely be needed within an enterprise environment. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control

and Technique(s): T1095.

win

Network connection from temp

Looks not processes running from a directory named "temp" making an IPv4 network connection. Attackers frequently operate out of "temp" directories, so this may identify suspicious processes. Additional tuning will likely be needed within an enterprise environment. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control

and Technique(s): T1095.

win

NETWORK SHARE

CONNECTION REMOVAL (METHODOLOGY)

This IOC detects the removal of a network share using net utility. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.005.

win

Network Share Removal

Identifies removal of network shares. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1070.005.

win

New Application in

AppCompat

Identifies processes run on the system based on appclication compatibility assistant. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1106.

win

NLTEST EXECUTION (METHODOLOGY)

Nltest is a built-in command-line tool that can be used to get a list of domain controllers, force a remote shutdown, query the status of trust etc. The IOC detects various actions associated with Nltest. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1018.

win

NMAP EXECUTION

(METHODOLOGY)

This IOC detects execution of nmap port scanning tool. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1046.

win

NSLOOKUP (UTILITY)

NSLOOKUP is a benign utility to query the domain name system, attackers can use it to discover remote systems. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1018.

win

OBFUSCATED COMMANDLINE

(METHODOLOGY)

This IOC detects different obfuscations present in the process commandline. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion Execution and Technique(s):

T1027, T1059

win

OBFUSCATION TECHNIQUES (METHODOLOGY)

Attackers often use javascript commands like fromcharcode or store the commands in document shapes to hide the actual commands being executed. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1027,

T1059.007.

win

OBFUSCATION USING ECHO REPLACE FEATURE

(METHODOLOGY)

Attackers have used the replace feature of echo command to obfuscate the commands being executed. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion

Execution and Technique(s): T1027, T1059.

win

Oracle Database Network

Connection

Identifies network connections to Oracle databases by port. This is associated with MITRE

ATT&CK (r) Tactic(s): Credential Access, Impact and Technique(s): T1110.002, T1489.

win

PACKET CAPTURE

(METHODOLOGY)

This IOC detects execution of packet capture tools. This is associated with MITRE ATT&CK

(r) Tactic(s): Credential Access, Discovery and Technique(s): T1040.

win

PAEXEC EXECUTION (UTILITY)

This IOC detects the execution of PAEXEC, a redistributable version of PSEXEC. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement and

Technique(s): T1570, T1021.002, T1569.002.

win

PAS WEBSHELL (FAMILY)

P.A.S. Webshell is a publicly available multifunctional PHP webshell in use since at least 2016 that provides remote access and execution on target web servers. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Command and Control, Credential Access, Execution, Collection, Defense Evasion, Persistence and Technique(s): T1087.001, T1071.001, T1110.001, T1059, T1213, T1005, T1140, T1083, T1070.004, T1105, T1046,

T1027, T1505.003, T1518.

win

PASSWORD CHANGER (METHODOLOGY)

This IOC detects the execution of net user command to change password. This is associated with MITRE ATT&CK (r) Tactic(s): Impact, Persistence, Credential Access and Technique(s):

T1531, T1078.001, T1078.002, T1078.003, T1110.004, T1110.001.

win

Peripheral device discovery

Identifies attempts to identify host device information. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1047, T1059.001, T1120.

win

Peripheral Discovery

Registry

Identifies attempts to enumerate peripheral devices by reading the Windows registry. This

is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1120.

win

PERSISTENT MSHTA.EXE PROCESS EXECUTION (METHODOLOGY)

This alert looks for suspicious mshta.exe usage in common persistence locations. Mshta.exe is a native Windows signed binary that can be used to execute local or remote .hta files.

This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1218.005.

win

Ping execution

Detects execution of the Windows ping utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1018.

win

PIPESHELL (FAMILY)

Pipeshell is a simple powershell script that supports running powershell commands on remote machine using named pipes. This IOC looks for Pipeshell commands in powershell consolehost history. This is associated with MITRE ATT&CK (r) Tactic(s): Execution,

Command And Control and Technique(s): T1059.001, T1090.001.

win

PLINK (UTILITY)

Attackers may tunnel network communications to and from a victim system within a separate protocol to avoid detection/network filtering and/or enable access to otherwise unreachable systems. This is associated with MITRE ATT&CK (r) Tactic(s): Command and

Control and Technique(s): T1572.

win

Port 53 Network Connection

Identifies uncommon processes communicating on port 53, generally associated with DNS. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and

Technique(s): T1071.004.

win

Port 80/433/8080/8443 Network Connection

Identifies interesting applications making network connections to ports 80, 433, 8080 and 8443, associated with HTTP and HTTPS. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control and Technique(s): T1071.001.

win

POSSIBLE APPLICATION SHIMMING

(METHODOLOGY)

This IOC detects possible attempt at Application Shimming. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1546.011.

win

Possible ChromePass execution (Credential

Stealer)

ChromePass password recovery tool execution. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1555.003.

win

POSSIBLE DLL HIJACKING ATTEMPT (METHODOLOGY)

The IOC detects either the creation of a new DLL file or overwriting of an existing one within the Windows directory, which could indicate a possible attempt at DLL hijacking. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation,

Defense Evasion and Technique(s): T1574.001, T1036.

win

POSSIBLE FILE ASSOCIATION MODIFICATION

(METHODOLOGY)

This IOC detects the execution of assoc utility, which would indicate a possible attempt at altering default file association. This is associated with MITRE ATT&CK (r) Tactic(s):

Persistence, Privilege Escalation and Technique(s): T1546.001.

win

POSSIBLE MIMIKATZ PRESENCE (FAMILY)

This IOC looks for the presence of mimikatz-related files. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1003.001, T1003.002,

T1003.004.

win

POSSIBLE PASS THE HASH ATTACK (METHODOLOGY)

Attackers may "pass the hash" using stolen password hashes to move laterally within an environment, bypassing normal system access controls. This IOC detects Pass the hash (PtH) method of authenticating as a user without having access to the user's cleartext password. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral

Movement and Technique(s): T1550.002.

win

POSSIBLE PASSWORD FILTER DLL REGISTRATION

(METHODOLOGY)

This IOC detects the possible registration of a password filter DLL. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion and Technique(s):

T1556.002.

win

Possible PowerUp script execution (Utility)

Detects PowerUp PowerShell script execution. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation and Technique(s):

T1059.001, T1543.003, T1574.001, T1574.010.

win

POSSIBLE RDP ENABLE ATTEMPT VIA NETSH

(METHODLOGY)

This IOC detects the creation of a Windows Firewall rule via netsh to allow incoming RDP connections. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral

Movement and Technique(s): T1562.004, T1021.001.

win

POSSIBLE REMOTE ACCESS TOOLS (METHODOLOGY)

This IOC detects possible presence of remote access tools and utilities. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Lateral Movement and

Technique(s): T1105, T1219, T1021.001, T1021.005.

win

POSSIBLE REMOTE ACTIVITY VIA WMIC (METHODOLOGY)

This IOC detects the possible execution of a command at a remote sytem using WMIC. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement and

Technique(s): T1047, T1021.006.

win

POSSIBLE SCREEN CAPTURE

ACTIVITY (METHODOLOGY)

This IOC detects the possible attempt at screen capturing. This is associated with MITRE

ATT&CK (r) Tactic(s): Collection and Technique(s): T1113.

win

POSSIBLE SHARPHOUND

(UTILITY)

This IOC detects the possible use of SharpHound utility. This is associated to MITRE ATT&CK

(r) Tactic: Collection and Technique: T1560, T1119.

win

POSSIBLE SMB ENABLE ATTEMPT VIA NETSH

(METHODLOGY)

This IOC detects the creation of a Windows Firewall rule via netsh to allow incoming SMB connections. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Lateral

Movement and Technique(s): T1562.004, T1021.002.

win

POSSIBLE UAC BYPASS ATTEMPT (METHODOLOGY)

This IOC detects the possible attempt at UAC based on specific registry entry using reg utility. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege

Escalation and Technique(s): T1548.002.

win

POTENTIAL CVE-2020-1350 PRE-EXPLOITATION

This IOC looks for registry query for TcpReceivePacketSize DNS service parameter, this can be done by attackers to determine if the machine is vulnerable to CVE-2020-1350. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement, Privilege

Escalation and Technique(s): T1059.001, T1068, T1203, T1210.

win

POTENTIAL DATA TRANSFER USING POWERSHELL

(METHODOLOGY)

This IOC detects indicators associated with the use of powershell for the purpose of data transfer. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and

Technique(s): T1105

win

POTENTIAL KEYLOGGER

OUTPUT (METHODOLOGY)

Detects common keylog control characters being written to a file. This is associated with

MITRE ATT&CK (r) Tactic(s): Collection, Credential Access and Technique(s): T1056.001.

win

PowerShell Child Process

Identifies processes spawned by PowerShell. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution and Technique(s): T1059.001.

win

POWERSHELL DOWNGRADE ATTACK (METHODOLOGY)

This IOC looks for older versions of powershell engines being loaded which is an indication of PowerShell downgrade attack. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1562.010.

win

POWERSHELL DOWNLOAD AT SUSPICIOUS PATH

(METHODOLOGY)

This IOC detects downloading of payloads in suspicious locations by powershell. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.001.

win

POWERSHELL DOWNLOADER G

(METHODOLOGY)

This IOC captures the use of Powershell to download and execute a file or command using Net.WebClient object. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and

Technique(s): T1059.001.

win

POWERSHELL ENCODED COMMAND

(METHODOLOGY)

Attackers may use powershell to execute base64 encoded commands to avoid immediate user suspicion. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion,

Execution and Technique(s): T1027, T1059.001.

win

PowerShell Engine Load

Detects processes loading the PowerShell engine. This may indicate that the process implements a custom PowerShell script host, which may be used to evade security monitoring. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s):

T1059.001.

win

PowerShell Execution

Detects PowerShell process execution. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.001.

win

PowerShell File Write

Detects PowerShell writing files to disk. May detect output written to disk or files downloaded from the internet using PowerShell. This is associated with MITRE ATT&CK (r)

Tactic(s): Command And Control, Execution and Technique(s): T1059.001, T1105.

win

PowerShell Get-Content Command

Identifies PowerShell get-content commands, used to read the contents of an item. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Credential Access and Technique(s):

T1005, T1025, T1039, T1552.001.

win

POWERSHELL HIDDEN WINDOW (METHODOLOGY)

Attackers often hide the powershell window to avoid user suspicion. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1059.001,

T1564.003.

win

PowerShell loading system.directoryservices.dll

Identifies PowerShell loading system.directoryservices.dll, which may indicate attempts to identify active directory information. This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1018.

win

PowerShell move command

execution

Detects use of PowerShell to move a file. This is associated with MITRE ATT&CK (r) Tactic(s):

Collection, Command And Control and Technique(s): T1074.001, T1105.

win

PowerShell Network Connection

Detects network connections from the PowerShell process. May detect PowerShell download cradles, some PowerShell backdoors, and other suspicious activity. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and

Technique(s): T1059.001, T1071.001, T1105.

win

PowerShell Network Discovery

Identifies Powershell commands associated with network configuration discovery,. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1016,

T1059.001.

win

PowerShell Process Listing

Identifies PowerShell process listing by arguments. This is associated with MITRE ATT&CK

(r) Tactic(s): Discovery, Execution and Technique(s): T1057, T1059.001.

win

POWERSHELL PROCESS LISTING A (METHODOLOGY)

This IOC detects the use of "Get-Process" powershell module to list running processes

within a system. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1057, T1059.001.

win

PowerShell Read Clipboard

Identifies attempts to read the clipboard. The encoded text decodes to "get-clipboard". This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Command And Control,

Execution and Technique(s): T1059.001, T1115, T1132.001.

win

PowerShell URL request

Detects URL requests from PowerShell. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control, Execution and Technique(s): T1059.001, T1071.001, T1105.

win

PowerShell WMI Activity

Identifies PowerShell interaction with WMI based on PowerShell process arguments. This is

associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1047, T1059.001, T1546.003.

win

PowerShell XOR

Identifies the PowerShell binary XOR (bxor) operation. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s): T1059.001, T1140.

win

Private Key

Identifies enumeration and aggregation of private key files. This is associated with MITRE

ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1552.004.

win

PROCESS EXECUTION FROM REDIRECTED RDP DRIVE

(METHODOLOGY)

This IOC detects the execution of a process through a mapped redirected local resource via an RDP system, which is a possible attempt at lateral movement. Kindly investigate the command line and parent process to confirm maliciousness. This is associated with MITRE

ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.001.

win

Process execution startup

Looks for scripting files being executed from startup using common scripting or execution binaries. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1059.001, T1059.003, T1059.005, T1059.007,

T1547.001.

win

PsExec execution (UTILITY)

Detects default PsExec execution, on both the source and target systems. Processes created using default PsExec will be launched by "psexesvc.exe". This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Lateral Movement, Persistence, Privilege Escalation

and Technique(s): T1021.002, T1543.003, T1569.002.

win

Putty execution

Detects execution of the Windows SSH client putty, based on file name. This is associated

with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.004.

win

PWDUMP (UTILITY)

Pwdump is an application that dumps password hashes from the SAM database.This is

associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1003.002

win

Python Activity

Identifies Python activity. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and

Technique(s): T1059.006.

win

Python Child Process

Identifies processes spawned by Python. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.006.

win

Python Exectuable

Identifies execution of Python wrappers like Py2EXE and PyInstaller. This is associated with

MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.006.

win

Python File Write

Detects Python writing files to disk. May detect output written to disk or files downloaded from the internet using Python. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control, Execution and Technique(s): T1059.006, T1105.

win

Python Network Connection

Identifies network connections established by Python processes. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Execution and Technique(s):

T1059.006, T1071.001, T1105.

win

Qprocess execution

Detects execution of the Windows qprocess utility. This is associated with MITRE ATT&CK

(r) Tactic(s): Discovery and Technique(s): T1057.

win

Query execution

Detects execution of the Windows query utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1033.

win

QUERY INTERNET SETTINGS REGISTRY ENTRIES

(METHODLOGY)

This IOC detects the attempt to read internet configuration stored under the "Internet Settings" registry path via reg.exe. This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1012.

win

Quser Execution

Identifies execution of the Windows quser utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1033.

win

QWINSTA EXECUTION

(METHODOLOGY)

This IOC detects execution of qwinsta utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1033.

win

RAINBOWCRACK (UTILITY)

RainbowCrack is a tool which generates rainbow tables to be used in password cracking.This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and

Technique(s): T1110.002

win

RANSOM NOTE

This IOC looks for typical strings found in ransom notes. This is associated with MITRE

ATT&CK (r) Tactic(s): Impact and Technique(s): T1486.

win

Rar archive created

Identifies RAR archives being created, based on header values. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Defense Evasion and Technique(s): T1074.001,

T1140, T1560.

win

Rar execution

Identifies execution or the "rar" utility, by file name and process arguments. This is associated with MITRE ATT&CK (r) Tactic(s): Collection, Defense Evasion and Technique(s):

T1074.001, T1140, T1560.

win

RDP Network Connection

Detects Windows Remote Desktop Protocol (RDP) connections, based on network port. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Credential Access, Exfiltration, Lateral Movement and Technique(s): T1021.001, T1048.001,

T1048.002, T1071.002, T1110.002.

win

Rdpclip Execution

Detects execution of the Windows rdpclip utility, which is used to support copying files to/from an RDP session. This is associated with MITRE ATT&CK (r) Tactic(s): Command And

Control and Technique(s): T1105.

win

Reg execution

Detects execution of the Windows reg utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Discovery and Technique(s): T1012, T1112.

win

Reg Query Service

Identifies registry queries used to discover service configuration details. This is associated

with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1007, T1012.

win

Regedit Execution

Detects execution of the Windows regedit utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Discovery and Technique(s): T1012, T1112.

win

Registry Modified

Identifies Registry modification. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1112.

win

Registry Modified with B64

encoded data

Identifies modifications of the registry with base64 encoded data. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1027.

win

Registry Modify

Identifies modifications of the registry. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion and Technique(s): T1112.

win

Registry Query

Identifies reg query commands. This is associated with MITRE ATT&CK (r) Tactic(s):

Discovery and Technique(s): T1012, T1518.001.

win

Remote desktop activity

Identifies use of the Windows remote desktop client "mstsc.exe". This will identify activity on the source system of RDP-based lateral movement on Windows systems. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s):

T1021.001.

win

REMOTE SHARE CONNECTION WITH NET.EXE

(METHODOLOGY)

This IOC detects the connection to remote shares using net.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.002.

win

REMOVAL OF BASH HISTORY (METHODOLOGY)

This IOC captures the attempt to remove the .bash_history file in Windows linux subsystem using rm command. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion

and Technique(s): T1070.003.

win

REMOVAL OF SYSMON UTILITY FROM SYSTEM

(METHODLOGY)

This IOC detects the possible attempt to remove Sysmon SysInternals utility, either by unloading the sysmon driver or by uninstalling sysmon itself. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

win

RENAMED CERTUTIL (METHODOLOGY)

This IOC detects the possible execution of a certutil command by a utility not named as certutil. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1036.003, T1140.

win

RENAMED POWERSHELL (METHODOLOGY)

This IOC detects possible usage of renamed powershell for masquerading purpose. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution and Technique(s):

T1036.003, T1059.001.

win

RENAMED SCHTASKS

(METHODOLOGY)

This IOC detects possible usage of renamed schtasks for masquerading purpose. This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.003.

win

RENAMED WINDOWS SCRIPTING UTILITY

(METHODOLOGY)

This IOC detects possible usage of renamed wscript or cscript for masquerading purpose. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s):

T1036.003.

win

RETRIEVAL OF HOTFIXES INSTALLED

(METHODOLOGY)

This IOC detects the execution of a WMIC command to retrieve list of hotfixes installed. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

REVIEW OF BASH HISTORY (METHODOLOGY)

This IOC captures the attempt to review the .bash_history file in Windows linux subsystem using cat command. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access

and Technique(s): T1552.003.

win

Route execution

Detects execution of the Windows route utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Discovery and Technique(s): T1016.

win

Rubeus Kerberos Ticket Activity

Identifies Rubeus kerberos ticket activity by process arguments. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion, Lateral Movement and

Technique(s): T1550.003, T1558.003.

win

Run Key Persistence

Detects modification of Windows "run" and "runonce" registry persistence keys. This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege Escalation and Technique(s): T1112, T1547.001.

win

Runas execution

Detects execution of the Windows runas utility, which is used to run a process in the context of a different user. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion, Execution, Privilege Escalation and Technique(s): T1059.003, T1134.002.

win

Rundll32 Execution

Detects execution of Windows rundll32 utility. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion and Technique(s): T1218.011.

win

RUNDLL32 FILE WRITE

Detects Rundll32 writing files to disk. May detect output written to disk or files downloaded from the internet using Rundll32.This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Command And Control and Technique(s): T1218.011, T1105.

win

Rundll32 Network Connection

Identifies rundll32.exe establishing network connections. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s): T1105,

T1218.011.

win

Rundll32 Not Running DLL

Identifies Rundll32 used to run files without .dll extension. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.004, T1218.011.

win

Rundll32 URL request

Identifies Rundll32 establish a network connection URL request. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s):

T1071.001, T1105, T1218.011.

win

RYUK RANSOMWARE

RYUK is a ransomware that uses a combination of public and symmetric-key cryptography to encrypt files on the host computer. This IOC looks for indicators of ryuk ransomware execution. This is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s):

T1486.

win

SC Create

Identifies the sc create command used to create Windows services. This is associated with

MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1543.003.

win

SC DELETE COMMANDLINE

(METHODOLOGY)

Identifies the sc delete command used to delete Windows services.This is associated with

MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1569.002.

win

SC execution

Detects execution of the Windows sevice controller utility sc. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution, Persistence, Privilege Escalation, Impact and

Technique(s): T1007, T1543.003, T1569.002, T1489.

win

SC Modify Service

Identifies use os the Windows sc utility to modify an existing Windows service. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation, Impact and

Technique(s): T1543.003, T1489.

win

SC Service Discovery

Identifies execution of the Windows sc command to identify Windows service details. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s):

T1007, T1569.002.

win

SC Start

Identifies use of SC to start a service. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1569.002.

win

SC Stop

Identifies the use of sc to stop a service. This is associated with MITRE ATT&CK (r) Tactic(s):

Defense Evasion, Impact, Execution and Technique(s): T1489, T1562.001, T1569.002.

win

SCHEDULE TASK ON REMOTE HOST

(METHODOLOGY)

This IOC detects the creation of a scheduled task on remote host. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s):

T1053.005.

win

Scheduled Task Activity

Detects Windows scheduled task activity based on execution of the "at" and "schtasks" utilities and modification of scheduled task files. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution, Persistence, Privilege Escalation and Technique(s): T1053.005.

win

Scrcons child

Detects activity by the WMI scripting host scrcons.exe, which may indicate WMI activescript event consumer execution. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.001, T1059.005.

win

Script File Created

Identifies script files by extension. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1059.

win

Sdclt Child Process

Identifies processes spawned by sdclt.exe, which may indicate a UAC bypass. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and

Technique(s): T1548.002.

win

Sdelete command execution

Detects execution of the sysinternals sdelete command based on file name. This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.004.

win

Sdelete file write

Detects execution of the sysinternals sdelete command based on how it renames files. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s):

T1070.004.

win

SECRETSDUMP (CREDENTIAL STEALER)

SECRETSDUMP is a python module available in public used to steal credentials. It is capable of SAM hash dumping ,exporting certificates and private keys of the executing user as well as remote user. This is associated to MITRE ATT&CK (r) Tactic: Credential Access and

Technique: T1003.002, T1003.003.

win

SECRETSDUMP B

(CREDENTIAL STEALER)

SECRETSDUMP is a python module available in public used to steal credentials. It is capable

of SAM hash dumping ,exporting certificates and private keys of the executing user as well as remote user. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and

Technique(s): T1003.006.

win

SECURITY ACCOUNT MANAGER FILE DUMPING

(METHODOLOGY)

This IOC detects the creation of SAM (Security Acccount Manager), System files, which could indicate a possible attempt at credential dumping. This is associated with MITRE

ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1003.002.

win

Security Software Discovery

Identifies attempts to discover the installed antivirus, antispyware and firewall on the system. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and

Technique(s): T1047, T1059.001, T1518.001.

win

SERVICE CREATION FOR COMMAND EXECUTION

(METHODLOGY)

This IOC detects sc.exe being leveraged to execute any given command. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation and

Technique(s): T1569.002, T1543.003.

win

SERVICE DISABLE

This IOC detects the disabling of a service. Attackers may disable security services to avoid detection or disable normal services to achieve service disruption. This is associated with

MITRE ATT&CK (r) Tactic(s): Impact, Defense Evasion and Technique(s): T1489, T1562.001.

win

Service Execution

Identifies uncommon binaries run as a service, based on services.exe parent process. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1569.002,

T1059.003.

win

Service Persistence

Detects modification of Windows service persistence registry keys. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Privilege Escalation

and Technique(s): T1112, T1543.003, T1569.002, T1574.011.

win

Set command execution

Detects Windows "set" commands based on process arguments. Will not detect "set" commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1082.

win

Set command output

Detects output of the Windows "set" command being written to disk. This is associated

with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

SetMACE Execution

Identifies execution of the timestomping utility setmace.exe. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1070.006.

win

Setx command execution

Detects execution of the Windows setx utility to set the values of environment variables, locally or remotely. Attackers may abuse this utility to remotely modify the Windows registry. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Discovery and

Technique(s): T1012, T1112.

win

Share Discovery

Identifies share discovery. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and

Technique(s): T1049, T1135.

win

Share Mount

Identifies network share mounting. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Exfiltration, Lateral Movement and Technique(s): T1021.002, T1048.003,

T1087.002.

win

SHUTDOWN (UTILITY)

Detects the supicious shutdown/reboot of systems to interrupt access to, or aid in the destruction of, those systems. This is associated with MITRE ATT&CK (r) Tactic(s): Impact

and Technique(s): T1529.

win

SMBEXEC (UTILITY)

Detects execution of the Windows SMB utility, used to interact with file shares, allowing them to move laterally throughout a network. This is associated with MITRE ATT&CK (r)

Tactic(s): Lateral Movement and Technique(s): T1021.002.

win

SMTP Network Connection

Identifies SMTP network traffic based on port. This is associated with MITRE ATT&CK (r)

Tactic(s): Command And Control, Exfiltration and Technique(s): T1048.001, T1048.002, T1071.003.

win

SNMP Network Connection

Identifies Simple Network Management Protocol (SNMP) network connections by port. This

is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1498.001.

win

SOLARWIND SERV-U RCE (EXPLOIT)

This IOC detects suspicious artifacts associated with SolarWinds Serv-U software remote code execution exploit. It also detects supicious child process launch from Serv-U.exe and command lines arguments provided to those child processes. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Initial Access, Discovery and Technique(s): T1190, T1203,

T1033, T1083.

win

SSH/SCP/SFTP network connection

Identifies Secure Shell (SSH), Secure Copy Protocol (SCP), and Secure File Transfer Protocol network connections based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Exfiltration, Lateral Movement and Technique(s): T1021.004,

T1048.001, T1048.002, T1071.002.

win

Startup folder persistence

Detects the creation of files in the Windows startup directory, which may be used for persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege

Escalation and Technique(s): T1547.001.

win

SUBST EXECUTION

(METHODOLOGY)

This IOC detects execution of subst command. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion and Technique(s): T1070.005.

win

SUNBURST SUSPICIOUS CHILD PROCESSES

(METHODOLOGY)

This rule identifies suspicious child processes of SolarWinds.Orion.Core.BusinessLayer.dll that may be evidence of the SUNBURST backdoor. The behavior of SolarWinds.Orion.Core.BusinessLayer.dll is dependent on per-enterprise configuration, so additional tuning may be required to exclude legitimate activity in a given environment. SUNBURST is a backdoor that has the ability to spawn and kill processes, write and delete files, set and create registry keys, gather system information, and disable a set of forensic analysis tools and services. This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access

and Technique(s): T1195.002.

win

Suspicious ADS filewrite

Looks for filewrites to unusual NTFS Alternate Data Steams (ADS). This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1564.004.

win

SUSPICIOUS AMSI.DLL (METHODOLOGY)

Attackers can copy a malicious amsi.dll and a benign executable that loads amsi.dll in unusual locations like appdata and invoke the benign executable which will then load the malicious amsi.dll from current directory. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Persistence, Privilege Escalation and Technique(s): T1574.001.

win

SUSPICIOUS ATTEMPT TO ENCRYPT FILES

(METHODOLOGY)

This IOC detects the suspicious attempt to encrypt files usually seen in ransomware infections. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Impact and

Technique(s): T1083, T1486.

win

SUSPICIOUS ATTEMPT TO UPLOAD CROWN PLUGIN

(EXPLOIT)

This IOC detects a suspicious connection to Atlassian Crowd server over a non-TLS channel to upload plugin file. This could be an attempt to exploit CVE-2019-11580. This is associated

with MITRE ATT&CK (r) Tactic(s): Initial Access and Technique(s): T1190.

win

SUSPICIOUS CLEARING OF WINDOWS EVENT LOGS

(METHODOLOGY)

This alert will trigger on suspicious clearing of Windows event logs via Wevtutil utility. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Techniques(s):

T1070.001.

win

SUSPICIOUS CODE EXECUTION FROM WINDOWS DEFENDER

(EXPLOIT)

This IOC detects suspicious execution of a new process from windows defender. This could be due to potential exploitation of CVE-2021-1647. This is associated with MITRE ATT&CK

(r) Tactic(s): Execution, Privilege escalation and Technique(s): T1203, T1068.

win

SUSPICIOUS COMMANDS FROM HTTPD A

(METHODOLOGY)

This IOC looks for suspicious commands from Apache HTTP server which might be an indicator of active exploitation or the presence of a webshell. Investigate the source of activity and the processes launched to confirm maliciousness. This is associated with MITRE

ATT&CK (r) Tactic(s): Initial Access, Persistence and Technique(s): T1190, T1505.003.

win

SUSPICIOUS CREATION OF EXECUTABLE FILE BY IIS

WORKER (METHODOLOGY)

This IOC detects the suspicious creation of an executable file by IIS worker process. Attackers can exploit vulnerabilities in plugins such as RadAsyncUpload by Telerik (CVE- 2019-18935) to cause IIS worker process to execute code from uploaded files. This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access, Persistence and Technique(s):

T1190, T1505.003.

win

SUSPICIOUS CREATION OF SHADOWCOPY (METHODOLOGY)

This alert will trigger on suspicious creation of Volume Shadow Copies. This is related to Windows Elevation of Privilege Vulnerability (CVE-2021-36934) which provides non- privileged user access to system files on affected versions. If a Volume Shadow Copy Service (VSS) shadow copy of the system drive is available, a threat actor may leverage access to the critical system files including Security Accounts Manager (SAM) database and could extract and leverage account password hashes, obtain DPAPI computer keys, which can be used to decrypt all computer private keys and more. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Techniques(s): T1003.002, T1003.003.

win

SUSPICIOUS DISCOVERY OF ANTIVIRUS PRODUCTS USING WMI

(METHODOLOGY)

Detects use of PowerShell for listing of AntiVirus products using WMI. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1518.001, T1047,

T1059.001

win

Suspicious DLL load (methodology)

Identifies loads of known hijackable/side-loadable DLLs from uncommon locations. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Persistence, Privilege

Escalation and Technique(s): T1574.001, T1574.002.

win

Suspicious DLL load used by Scripting Interpreters

(methodology)

Detects loading of the WSH Object Model runtime library, wshom.ocx. Scripting interpreters such as WSH (Windows Script Host) and MSHTA may load this library to access objects such as the WSH network object (WScript.Network) or shell object (WScript.Shell) for the purposes of reading system information or making network connections. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1033,

T1059.

win

SUSPICIOUS DNS RESOLUTION OVER HTTPS

(METHODOLOGY)

This IOC detect the suspicious indicators associated with DNS resolution over HTTPS. Malware can resolve DNS through DoH services and evade URL domain based defences. This is associated with MITRE ATT&CK (r) Tactic(s): Exfiltration and Technique(s):

T1048.003.

win

SUSPICIOUS DOMAIN CONTROLLER LOGIN

ATTEMPT (EXPLOIT)

This IOC detects the suspicious login attempt made to a domain controller using an empty credential. This could be a potential attempt to exploit CVE-2020-1472 which allows domain controller takeover through malicious NETLOGON requests. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Defense Evasion, Privilege Escalation and

Technique(s): T1068, T1556.001.

win

SUSPICIOUS EXECUTABLE CREATED (METHODOLOGY)

This IOC looks for executables created by processes executing out of public folder. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s):

T1105.

win

SUSPICIOUS EXECUTABLE CREATED BY W3WP

(METHODOLOGY)

This IOC detects suspicious executable file created in temp directory by IIS worker process.This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access and Technique(s):

T1190.

win

SUSPICIOUS EXECUTABLE IN PUBLIC DOWNLOADS

(METHODOLOGY)

Attackers sometimes use not frequently used directories like /Users/Public/Downloads to avoid users noticing their binaries. This is associated with MITRE ATT&CK (r) Tactic(s):

Execution and Technique(s): T1204.002.

win

SUSPICIOUS EXPLORER.EXE (METHODOLOGY)

Adversaries may use legitimate windows binary file names like explorer.exe to name their malicious binaries to avoid user suspicion. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion and Technique(s): T1036.005.

win

SUSPICIOUS FILE CREATED BY OFFICE APPLICATION

(METHODOLOGY)

This IOC detects suspicious files written on disk by office applications. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Execution, Persistence, Credential Access, Lateral Movement, Discovery and Technique(s): T1204, T1547.001, T1547.009,

T1187, T1497.002, T1480

win

SUSPICIOUS FILE CREATION (METHODOLOGY)

This IOC detects files created by ransomware with suspicious file extensions and overwrites. Kindly investigate the contents of the file and the process which wrote to this file in order to confirm maliciousness. This is associated with MITRE ATT&CK (r) Tactic(s):

Impact and Technique(s): T1486.

win

Suspicious File Name

Identifies potentially malicious files based on name and extension. These file may be used for user execution attacks. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion, Execution and Technique(s): T1036.005, T1204.001, T1204.002.

win

SUSPICIOUS FILES IN PERFLOGS FOLDER

(METHODOLOGY)

Adversaries may use perflogs directory as a staging environment to store files before exfiltration or to store executables before execution. This is associated with MITRE ATT&CK

(r) Tactic(s): Collection, Command and Control and Technique(s): T1074.001, T1105.

win

SUSPICIOUS FIREEYE AMSI PLUGIN TAMPERING

(METHODOLOGY)

This IOC detects suspicious disabling of FireEye's AMSI Module. This alert should be ignored as it is expected during uninstallation, and should be investigated if triggered otherwise.

This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s):

T1562.001.

win

SUSPICIOUS GET- CHROMECREDS2 USAGE

(METHODOLOGY)

This IOC detects the usage of Get-ChromeCreds2 module which can be used to acquire credentials from Chrome.This is associated with MITRE ATT&CK (r) Tactic(s): Credential

Access and Technique(s): T1555.003.

win

SUSPICIOUS IMAGE LOAD BY OFFICE APPLICATION

(METHODOLOGY)

Detects winword.exe loading vbe related dlls which are used to execute macro code. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.005,

T1559.001.

win

SUSPICIOUS IMAGE LOAD BY W3WP.EXE

(METHODOLOGY)

W3WP.exe is the IIS worker process that can host web applications. Vulnerabilities in different web application frameworks like Telerik can sometimes make W3WP.exe load malicious DLLs to achieve remote code execution. This IOC looks for suspicious DLL loads by w3wp.exe process. Kindly investigate the image being loaded to confirm maliciousness.

This is associated with MITRE ATT&CK (r) Tactic(s): Initial Access and Technique(s): T1190.

win

SUSPICIOUS INVOCATION OF

SVCHOST (METHODOLOGY)

This IOC looks for suspicious parent process of svchost.exe, this could be an indication of a

malicious process trying to launch svchost.exe for injection purposes. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s):

T1055

win

Suspicious LNK File

Identifies unexpected LNK files being written to the system. Malicious LNK files may be used in a range of attacks, including for user execution, credential access, and persistence. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access, Execution, Persistence, Privilege Escalation, Defense Evasion, Discovery and Technique(s): T1187,

T1204.002, T1547.001, T1547.009, T1497.002, T1480, T1204.001.

win

SUSPICIOUS MODIFICATION OF POWERSHELL PROFILE

(METHODOLOGY)

PowerShell profile contains commands that runs when PowerShell starts. This can be used as a logon script to customize user environments. Malware can add malicious commands to profile files to attain persistence. This is associated with MITRE ATT&CK (r) Tactic(s):

Persistence, Privilege Escalation and Technique(s): T1546.013.

win

SUSPICIOUS MODIFICATION OF SID-HISTORY

(METHODOLOGY)

Security IDentifier (SID) is used to track the security principal and the access the account has when connecting to resources. Malware can modify the SID History of a used in the infected host to attain Domain Admin privileges. This is associated with MITRE ATT&CK (r)

Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1134.005.

win

SUSPICIOUS MSHTA EXECUTION

(METHODOLOGY)

This indicator detects suspicious launch of MSTHA process by explorer.exe. This parent child relationship is typically seen when mshta is executed by .lnk file.This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1218.005.

win

SUSPICIOUS NON- APPLICATION LAYER CONNECTION

(METHODOLOGY)

This IOC detects indicators related to suspicious network connection made by processes inside %TEMP%. Malware tend to use these channels to hide their communication from monitoring tools. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control

and Technique(s): T1095

win

Suspicious Office Document Created

Identifies the creation of uncommon office file formats, including macro-enabled file and legacy formats. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and

Technique(s): T1204.002.

win

Suspicious PE File

Identifies Windows PE files with unexpected file extensions. This may indiacte attempts to hide the nature of the file. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion and Technique(s): T1036.005.

win

SUSPICIOUS PROCESS LAUNCH BY SLUI.EXE

(METHODOLOGY)

SLUI is a legitimate windows utility that is assciated with user interface for software licensing. However, publicly documented bypasses for UAC exist which allow it to be misused in order to spawn an elevated process without a UAC check. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s):

T1548.002.

win

SUSPICIOUS REG FILE

CREATION (METHODOLOGY)

This IOC looks for creation of .reg files. This is associated with MITRE ATT&CK (r) Tactic(s):

Command And Control and Technique(s): T1105.

win

SUSPICIOUS REGSVR32 CMDLINE (METHODOLOGY)

Regsvr32.exe can be used as an application whitelisting bypass to execute script contents embedded in a local file irrespective of file extension. This is associated with MITRE ATT&CK

(r) Tactic(s): Defense Evasion and Technique(s): T1218.010.

win

SUSPICIOUS RTF

This IOC looks for RTF files that do not have the rtf file extension. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.

win

SUSPICIOUS RUN REGISTRY ADDITION (METHODOLOGY)

This IOC detects the suspicious value added in the run registry via reg utility. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and

Technique(s): T1547.004.

win

SUSPICIOUS SCREESAVER MODIFICATION

(METHODOLOGY)

Screensavers in windows are custom PE files with .scr extension and are configured to execute after a pre-configured amount of user-inactivity. Malwares can modify this behaviour by modifying the registry value of SCRNSAVE. This is associated with MITRE

ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1546.002.

win

SUSPICIOUS SYSINTERNALS

TOOLS EXECUTION

This IOC looks for possible sysinternals tools executing with masqueraded file names. This is

associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1036.003.

win

SUSPICIOUS URL SHORTCUT (METHODOLOGY)

Adversaries may modify the URL shortcut files to establish persistence on victim machine. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and

Technique(s): T1547.009.

win

SUSPICIOUS USAGE OF SET AND START COMMAND

(METHODOLOGY)

This IOC detects the usage of set and start command.This is associated with MITRE ATT&CK

(r) Tactic(s): Execution and Technique(s): T1106.

win

SUSPICIOUS USAGE OF

WINLOGON REGISTRY (METHODOLOGY)

This IOC detects the suspicious usage of winlogon registry. This is associated with MITRE ATT&CK (r) Tactic(s): Persistence, Privilege Escalation and Technique(s): T1547.004.

win

SUSPICIOUS USE OF CERTUTIL TO OBFUSCATE PAYLOAD EXECUTION

(METHODOLOGY)

This IOC detects the suspicious execution of certutil binary to download and decode payload from remote server. This is associated with MITRE ATT&CK (r) Tactic(s): Defense

Evasion, Command And Control and Technique(s): T1036.003, T1140, T1132.001.

win

SUSPICIOUS WERFAULT INVOCATION

(METHODOLOGY)

This IOC looks for wefault.exe being launched with no command line options, this could be an indication of werfault,exe being launched for injection purposes. This is associated with

MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1055.

win

SUSPICIOUS WMI EXECUTE RUNDLL32 (METHODOLOGY)

This IOC detects Windows Management Instrumentation (WMI) host process wmiprvse.exe executing rundll32.exe. This technique has been used for lateral movement, in order to achieve code execution on the remote host. This is associated with MITRE ATT&CK (r)

Tactic(s): Execution, Defense Evasion and Technique(s): T1047, T1218.011.

win

SUSPICIOUS WUAUCLT (METHODOLOGY)

Adversaries may use benign windows binaries like wuauclt.exe to proxy execution of their malicious binary. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1218.

win

SVCHOST CHILD PROCESS

(METHODOLOGY)

This IOC looks for suspicious child process of svchost.exe. This is associated with MITRE

ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1055.

win

Sysinternals utility execution

Detects sysinternals utilities based on the -accepteula command-line argument, which is required at the first execution of the utility, if run from the command-line. These tools

provide a wide range of capabilities and are often used legitimately.

win

System Info Aggregation

Identifies potential WMI/PowerShell systeminformation discovery commands. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1033,

T1047, T1059.001, T1082.

win

SYSTEM PROCESS NETWORK CONNECTION

(METHODOLOGY)

This IOC detects network connections from the system process. It detects system process download cradles, some backdoors, and other suspicious activity. This is associated with

MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1071.001, T1105.

win

SYSTEM PROCESS URL

REQUEST (METHODOLOGY)

This IOC detects URL requests from system process.This is associated with MITRE ATT&CK

(r) Tactic(s): Command And Control and Technique(s): T1071.001, T1105.

win

SYSTEM REBOOT WIN

(METHODOLOGY)

This IOC detects a suspicious reboot of a Windows machine. This is associated with MITRE

ATT&CK (r) Tactic(s): Impact and Technique(s): T1529.

win

SYSTEM SHUTDOWN WIN

(METHODOLOGY)

This IOC detects a suspicious shutdown of a Windows machine. This is associated with

MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1529.

win

SYSTEM TIME DISCOVERY (METHODOLOGY)

This IOC detects discovery of the system time.This information is useful to an attacker to perform additional activities. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery

and Technique(s): T1124.

win

SYSTEM TIME DISCOVERY

(METHODOLOGY)

This IOC detects different attempts to obtain system time. This is associated with MITRE

ATT&CK (r) Tactic(s): Discovery and Technique(s): T1124.

win

SYSTEM32 WMIC.EXE PROCESS CALL CREATE (METHODOLOGY)

This alert looks for a system32 binary directly launching wmic.exe (even a renamed version of this binary) and the PROCESS CALL CREATE arguments to launch a local or remote process. This has been seen used in scenarios where the attacker has injected into a legitiamte system32 binary using a backdoor such as Cobalt Strike BEACON to then issue child processes from the selected system32 post-exploitation binary, also running injected code. This is associated to MITRE ATT&CK (r) Tactic: Execution and Technique: T1059.001,

T1059.003.

win

Systeminfo execution

Detects execution of the Windows systeminfo utility. This is associated with MITRE ATT&CK

(r) Tactic(s): Discovery and Technique(s): T1082.

win

Systeminfo output

Detects output of the Windows systeminfo utility being written to disk. This is associated

with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

Takeown execution

Detects execution of the Windows takeown utility, which can be used to change file ownership. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1036.005, T1222.001.

win

TASK CREATION ON REMOTE SYSTEM (METHODLOGY)

This IOC detects the creation of a scheduled task to be executed possibly on a remote machine, using schtasks.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Execution,

Persistence, Privilege Escalation and Technique(s): T1053.005.

win

TASK SET TO RUN ON STARTUP (METHODOLOGY)

This IOC detects the creation of a scheduled task set to execute on startup, using schtasks.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence,

Privilege Escalation and Technique(s): T1053.005.

win

Taskkill execution

Detects execution of the Windows taskkill command, used to end Windows processes. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Impact and Technique(s):

T1562.001, T1489.

win

Tasklist execution

Detects execution of the Windows tasklist command, used to list processes and services. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1007,

T1057, T1518.001.

win

Telnet Network Connection

Identifies telnet network traffic by port. Telnet is a plaintext protocol and should generally be avoided. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control,

Exfiltration and Technique(s): T1048, T1071.

win

Temp Directory PE Write

Identities PE files written to the Windows temp directories. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Defense Evasion and Technique(s): T1036,

T1105.

win

TESTSIGNING ON

Adversaries may enable testsigning on windows to facilitate the loading of a malicious driver. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and

Technique(s): T1553.006.

win

TFTP Network Connection

Identifies Trivial File Transfer Protocol (TFTP) network traffic by port. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Exfiltration and Technique(s): T1048,

T1071.002, T1105.

win

TIGHTVNC (UTILITY)

This looks for files that are related to tightvnc utility. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1105.

win

Tracert execution

Detects execution of the tracert command. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1018.

win

Tree command execution

Detects Windows "tree" file listing commands. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.001, T1059.003, T1083.

win

Tree command output

File containing output from the "tree" command. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1083.

win

Treesize command

Detects execution of the treesize utility, based on file name. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1083.

win

TRICKBOT (BACKDOOR)

Trickbot is a trojan that installs scheduled tasks with legitimate looking names to masquerade as legitimate activity. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence, Privilege Escalation, Defense Evasion and Technique(s): T1053.005, T1036.004.

win

TSClient file write

Detects files copied to a local shared drive in an RDP session. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Exfiltration and Technique(s): T1048, T1105.

win

Type command execution

Detects Windows type commands based on process arguments. Will not detect commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery, Execution and Technique(s): T1059.001, T1059.003, T1083.

win

UAC DISABLE VIA REGISTRY (METHODOLOGY)

This IOC detects the attempt to disable User Access Control via Registry. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Privilege Escalation and Technique(s): T1548.002.

win

Uncommon port connection

Identifies uncommon port usage. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1571.

win

Unusual Internet-Sourced File

Identifies uncommon file types downloaded from the internet. These may be used in user execution attacks. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1204, T1204.001.

win

Unusual Outlook Parent

Process

Identifies the outlook client process being run by a process other than explorer.exe. This is associated with MITRE ATT&CK (r) Tactic(s): Collection and Technique(s): T1114.

win

USB DEVICE DISCOVERY (METHODOLOGY)

This IOC detects the use of Win32_USBControllerDevice WMI class to get list of connected usb devices. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1120.

win

User and Domain ENV

Identifies references to user and domain environment variables. This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1059.001, T1059.003.

win

User Directory File Write

Identifies file writes to user directories. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1105.

win

USER EXECUTION

(METHODOLOGY)

Adversaries often rely on user executing the malicious file in order to get code execution.

This is associated with MITRE ATT&CK (r) Tactic(s): Execution and Technique(s): T1204.002.

win

Vaultcli.dll load

Detects load of the Windows credential management library "vaultcli.dll", by non-standard processes.

This may be associated with credential theft. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1003.

win

Ver command execution

Detects Windows "ver" commands based on process arguments. Will not detect ver commands within the command processor, as those commands are internal and do not spawn a new process. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

win

Ver command output

Detects output of the Windows cmd "ver" command written to disk. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1082.

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Virtualization/Sandbox Evasion

Identifies commands used in virtualization identification and sandbox evasion. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Discovery, Execution and Technique(s): T1047, T1059.001, T1497.001.

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VNC Network Connection

Identifies VNC network connections based on port. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Credential Access, Defense Evasion, Execution, Initial Access, Lateral Movement, Persistence, Privilege Escalation and Technique(s): T1021.001, T1021.005, T1071, T1072, T1078, T1110, T1133, T1219.

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VSSADMIN RESIZE

Vssadmin resize shadowstorage command can be used by ransomwares to force deletion of existing shadow copies to inhibt system recovery. This is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1490.

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VSSADMIN SHADOW COPY LIST (METHODOLOGY)

This IOC detects the usage of vssadmin listing. This gives information about shadow copies, creation date, and location of each copy on a computer. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1083.

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w3wp process creation

Detects processes spawned by the Windows web server binary "w3wp.exe", which may indicate process execution from a web shell. This is associated with MITRE ATT&CK (r) Tactic(s): Execution, Persistence and Technique(s): T1059, T1059.006, T1059.007, T1505.003.

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Web Service C2

Identifies requests for legitimate web services from unexpected applications. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1071, T1102.

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WebDav Activity

Identifies webdav activity. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Exfiltration and Technique(s): T1048, T1105.

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WebDav Network Request

Detects plaintext WebDav network requests based on user agent. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control, Exfiltration and Technique(s): T1048, T1105.

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wevtutil command

Detects execution of the Windows "wevtutil" command, used to modify event log settings or clear logs. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

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WGET EXECUTION

(METHODOLOGY)

This IOC detects the execution of WGET command. This is associated with MITRE ATT&CK (r) Tactic(s): Command And Control and Technique(s): T1105.

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Whoami execution

Detects execution of the Windows "whoami" command, used to show the current user context. This is associated with MITRE ATT&CK (r) Tactic(s): Discovery and Technique(s): T1033, T1069.

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WIFI PASSWORD EXTRACTION

(METHODOLOGY)

IOC detects possible extraction of WiFi passwords using netsh. This is associated with MITRE ATT&CK (r) Tactic(s): Credential Access and Technique(s): T1003.

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WINDOWS BACKUP DELETION (METHODOLOGY)

Wbadmin is a utility that can be used to delete windows backup catalog. Adversaries usually use this technique to inhibit system recovery. This is associated with MITRE ATT&CK (r) Tactic(s): Impact and Technique(s): T1490.

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WINDOWS DEFENDER DISABLE VIA REGISTRY

(METHODOLOGY)

IOC detects disabling of Windows defender via registry. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1112, T1562.001.

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WINDOWS DEFENDER SERVICE DISABLE

IOC detects disabling of Windows Defender service. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.001.

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WINDOWS FIREWALL DISABLE VIA NETSH

This IOC detects the possible attempt to disable Windows Firewall via netsh. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion and Technique(s): T1562.004.

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WINDOWS REMOTE MANAGEMENT (UTILITY)

WinRM is the name of both a Windows service and a protocol that allows a user to interact with a remote system.Adversaries may use Valid Accounts to interact with remote systems using Windows Remote Management (WinRM). The adversary may then perform actions as the logged-on user.This is associated with MITRE ATT&CK (r) Tactic(s): Lateral Movement,Execution and Technique(s): T1021.006,T1047.

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WINDOWS UDPATE SERVICE DISABLE (METHODOLOGY)

IOC detects disabling of Windows update service. This is associated with MITRE ATT&CK (r) Tactic(s): Defense Evasion, Impact, Persistence, Privilege Escalation and Technique(s):

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WinRM Network Connection

Identifies network connections using the default WinRM ports 5985 (HTTP) and 5986 (HTTPS) and user agent. This is associated with MITRE ATT&CK (r) Tactic(s): Lateral

Movement and Technique(s): T1021.006.

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WinRM Process Activity

Identifies Windows Remote Management (WinRM) activity. This is associated with MITRE

ATT&CK (r) Tactic(s): Lateral Movement and Technique(s): T1021.006.

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