Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Fingerprint Blacklist Malicious SSL certificate detected (CryptoWall C2)"; flow:established,from_server; content:"|20|kpai7ycr7jxqkilp.torexplorer.com"; tls.fingerprint:"0e:dd:72:24:52:c1:2c:68:6f:16:a7:ee:7b:e7:4b:56:e8:9a:6d:b5"; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2018693; rev:6; metadata:attack_target Client_and_Server, created_at 2014_07_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)