alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Malicious SSL Certificate detected (Patchwork CnC)"; flow:established,to_client; tls.cert_subject; content:"C=CN, ST=neijing, O=Internet Widgits Pty Ltd"; fast_pattern; content:"s"; distance:0; tls.cert_issuer; content:"C=CN, ST=neijing, O=Internet Widgits Pty Ltd"; content:"s"; distance:0; reference:url,twitter.com/blackorbird/status/1225002203221393411; classtype:domain-c2; sid:2029394; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_02_06, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2025_07_24, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)