Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (KINS C2)"; flow:established,to_client; tls.cert_serial; content:"00:F9:C6:AF:2F:81:7B:A2:2B"; fast_pattern; tls.cert_subject; content:"O=My Company Ltd"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2019107; rev:3; metadata:attack_target Client_and_Server, created_at 2014_09_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_11, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)