alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ABUSE.CH SSL Blacklist Malicious SSL certificate detected"; flow:established,to_client; tls.cert_serial; content:"00:E6:7B:40:4F:24:B8:2A:F9"; fast_pattern; tls.cert_subject; content:"Internet Widgits Pty Ltd"; reference:url,sslbl.abuse.ch; reference:md5,3d8d1a65ce53c6ac2e43523e82a6d471; classtype:domain-c2; sid:2022713; rev:4; metadata:attack_target Client_and_Server, created_at 2016_04_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_08, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)