Versions (4)
Version DetailsCurrent
Rev: 3 • Jul 28, 2015, 12:00 PMET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Ransomware CnC)
alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Ransomware CnC)"; flow:established,to_client; content:"|09 00 aa ad 0a 9f da 99 c2 e3|"; fast_pattern; tls.cert_subject; bsize:43; content:"C=XX, L=Default City, O=Default Company Ltd"; reference:url,sslbl.abuse.ch; classtype:command-and-control; sid:2021541; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_07_28, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_02, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)
Jul 28, 2015, 12:00 PM
Apr 2, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Oct 13, 2025, 9:34 PM
rules/emerging-malware.rules