Versions (5)
Version DetailsCurrent
Rev: 4 • Sep 15, 2015, 12:00 PMET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Shifu CnC)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Shifu CnC)"; flow:established,to_client; tls.cert_serial; content:"00:F2:49:34:BB:25:38:61:40"; fast_pattern; tls.cert_subject; content:"O=Internet|20|Widgits|20|Pty|20|Ltd"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2021784; rev:4; metadata:attack_target Client_and_Server, created_at 2015_09_15, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Sep 15, 2015, 12:00 PM
Apr 8, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Dec 11, 2025, 10:34 PM
rules/emerging-malware.rules