Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (TrickBot CnC)"; flow:established,to_client; tls_cert_subject; content:"C=AU, ST=f2tee4, L=gf23et65adt, O=tg4r6tds, OU=rst, CN=rvgvtfdf"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2025155; rev:1; metadata:attack_target Client_and_Server, created_at 2017_12_19, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)