Versions (5)
Version DetailsCurrent
Rev: 2 • Oct 20, 2015, 12:00 PMET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Dridex)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Dridex)"; flow:established,to_client; tls.certs; content:"|30 09 06 03 55 04 06 13 02|UK|31|"; fast_pattern; tls.cert_subject; content:"C=UK"; startswith; content:!"ST="; content:!"L="; content:"O="; pcre:"/^(?!GoDaddy)[A-Z][a-z]+\s[A-Z][a-z]+\s(?:NL|Pty|Inc|Corp|Ltd)/Rs"; content:"CN="; pcre:"/^(?:[a-z]{5,}\.[a-z]{2,3})$/R"; classtype:domain-c2; sid:2021980; rev:2; metadata:attack_target Client_and_Server, created_at 2015_10_20, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Oct 20, 2015, 12:00 PM
Apr 3, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Jan 14, 2026, 11:34 PM
rules/emerging-malware.rules