Rule History

alert tls $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Observed Malicious SSL Cert (Sidewinder APT CnC)"; flow:established,to_client; tls.cert_subject; content:"CN=ap-ms.net"; nocase; endswith; reference:md5,58363311f04f03c6e9ccd17b780d03b2; classtype:domain-c2; sid:2029911; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_04_15, deployment Perimeter, malware_family Sidewinder, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)