Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Remcos Domain (retghrtgwtrgtg .bounceme .net in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".retghrtgwtrgtg.bounceme.net"; endswith; fast_pattern; reference:url,twitter.com/JAMESWT_MHT/status/1724401325734027567; classtype:trojan-activity; sid:2049175; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_11_14, deployment Perimeter, malware_family Remcos, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_26, reviewed_at 2024_01_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)