alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED ABUSE.CH SSL Blacklist Malicious SSL certificate detected (KINS C2)"; flow:from_server,established; content:"|55 04 06|"; content:"|02|XX"; distance:1; within:3; content:"|55 04 07|"; distance:0; content:"|0c|Default City"; distance:1; within:13; content:"|55 04 0a|"; distance:0; content:"|13|Default Company Ltd"; fast_pattern; distance:1; within:20; tls.fingerprint:"1e:0f:3d:14:42:f9:52:2b:24:25:15:cb:69:68:a1:0b:08:f4:85:7c"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2018858; rev:3; metadata:attack_target Client_and_Server, created_at 2014_07_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_15, mitre_tactic_id TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities;)