Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (Dridex)"; flow:established,from_server; content:"|55 04 03|"; content:"|0c|ghheranon.ad"; distance:1; within:13; fast_pattern; reference:url,sslbl.abuse.ch; classtype:domain-c2; sid:2021613; rev:4; metadata:attack_target Client_and_Server, created_at 2015_08_11, 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;)