Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (FindPOS CnC)"; flow:established,to_client; tls.cert_serial; content:"00:F2:66:4A:29:E0:7E:C2:78"; fast_pattern; tls.cert_subject; content:"C=XX"; content:"L=Default City"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2022227; rev:3; metadata:attack_target Client_and_Server, created_at 2015_12_08, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_24, mitre_tactic_id TA0042, mitre_tactic_name Resource_Development, mitre_technique_id T1587, mitre_technique_name Develop_Capabilities;)