alert dns $HOME_NET any -> any any (msg:"ET INFO External IP Lookup Domain DNS Lookup (ip .dnsexit .com)"; dns.query; content:"ip.dnsexit.com"; nocase; bsize:14; classtype:external-ip-check; sid:2034898; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_12, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_01_12, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;)