Bro DNS TQL queries

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The following TQL queries are Bro DNS queries.

Identify internal systems attempting to resolve domains containing "domain.com" in a specific country
class:bro_dns srcisp:"private ip address lan" domain:"domain.com" srcisp:"private ip address lan" domain:"domain.com" dstcountrycode:cn
    Identify frequently requested DNS domain names
    class:bro_dns not srcport:137 | groupby domain
      Identify infrequently requested DNS domain names (may require tuning)
      class:bro_dns not srcport:137 not domain:"in-addr.arpa" not domain:"ip6.arpa" | groupby < domain 1000