Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (ServHelper CnC)"; flow:from_server,established; tls.cert_issuer; content:"C=AU, ST=Some-State, L=City, O=Some Company"; tls.cert_serial; content:"0E:06:ED:F2:C3:91"; classtype:domain-c2; sid:2026616; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2018_11_16, deployment Perimeter, malware_family ServHelper, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)