Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Suspected TA453 Related Domain (metahelpservice .net in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".Metahelpservice.net"; endswith; fast_pattern; reference:url,filter.watch/en/wp-content/uploads/sites/2/2023/11/Hacker-Watch-Jan-Nov-2023.pdf; reference:url,twitter.com/filterbaan; classtype:domain-c2; sid:2049457; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_12_04, deployment Perimeter, deprecation_reason Age, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_04, reviewed_at 2024_03_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)