Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE Cobalt Strike Related Domain in DNS Lookup (extic .icu)"; dns.query; content:"extic.icu"; nocase; bsize:9; reference:url,isc.sans.edu/diary/rss/28752; classtype:domain-c2; sid:2037105; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_06_24, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_24;)