alert dns $HOME_NET any -> any any (msg:"ET MALWARE Cobalt Strike CnC Domain in DNS Lookup (a .pwn-t .tk)"; dns.query; content:"a.pwn-t.tk"; nocase; bsize:10; reference:url,twitter.com/TheDFIRReport/status/1463175512000368640; reference:md5,36be5b491426de64f9ac85c50f85808c; classtype:domain-c2; sid:2034539; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_23, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2021_11_23, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)