Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected (ProxyChanger)"; flow:established,to_client; tls.cert_subject; content:"CN=systruster.com"; reference:url,sslbl.abuse.ch; reference:md5,efa5ea2c511b08d0f8259a10a49b27ad; classtype:domain-c2; sid:2022066; rev:3; metadata:attack_target Client_and_Server, created_at 2015_11_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_10, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)