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:B8:68:97:9E:DC:1F:A8:CC"; fast_pattern; tls.cert_subject; content:"CN="; content:"local.domain"; within:13; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2019009; rev:3; metadata:attack_target Client_and_Server, created_at 2014_08_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_09, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)