Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (KINS CnC)"; flow:established,to_client; tls.cert_serial; content:"00:9D:36:FF:20:E3:B5:4D:15"; fast_pattern; tls.cert_subject; content:"L="; content:"Default City"; within:13; content:"Default Company Ltd"; within:20; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2020196; rev:3; metadata:attack_target Client_and_Server, created_at 2015_01_16, 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 TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities;)