Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Fingerprint Blacklist Malicious SSL certificate detected (KINS C2)"; flow:established,from_server; content:"|09|server265"; fast_pattern:only; tls.fingerprint:"65:a7:7d:36:d1:b5:36:65:f6:0d:19:71:89:24:50:4f:7d:3f:95:08"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2018707; rev:5; metadata:attack_target Client_and_Server, created_at 2014_07_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)