Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Cobalt Strike CnC Domain in DNS Lookup (bg .knonwsec .com)"; dns.query; content:"bg.knonwsec.com"; nocase; bsize:15; reference:url,twitter.com/malwrhunterteam/status/1425771461499920385; reference:md5,e31a96ce2760c27a4f1cf83a0b5da83b; classtype:domain-c2; sid:2034473; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_11_16, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_16;)