Versions (4)
Version DetailsCurrent
Rev: 2 • May 6, 2024, 12:00 PMET MALWARE Observed APT42/TA453 Domain (litby .us in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed APT42/TA453 Domain (litby .us in TLS SNI)"; flow:established,to_server; tls.sni; bsize:8; content:"litby.us"; fast_pattern; reference:url,cloud.google.com/blog/topics/threat-intelligence/untangling-iran-apt42-operations; classtype:misc-activity; sid:2052425; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_05_06, deployment Perimeter, deprecation_reason Duplicate, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_06_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
May 6, 2024, 12:00 PM
Jun 12, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 11, 2025, 10:35 PM
rules/emerging-malware.rules