Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Gozi CnC)"; flow:established,to_client; tls.cert_serial; content:"00:E8:06:34:93:99:F8:54:F2"; fast_pattern; content:"O=Companyname"; reference:md5,c7872508eededb17cf864886270fd3e9; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2021828; rev:4; metadata:attack_target Client_and_Server, created_at 2015_09_23, 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;)