Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Various Malware Staging Domain (direct-trojan .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"direct-trojan.com"; bsize:17; fast_pattern; reference:md5,f4a68987e0ef243fa1e9bfe07c643052; classtype:trojan-activity; sid:2043291; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_01_12, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_12, reviewed_at 2023_09_01, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)