Versions (4)
Version DetailsCurrent
Rev: 2 • Jan 16, 2024, 12:00 PMET MALWARE Observed Lumma Stealer Related Domain (contextsuffreintymore .fun in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Lumma Stealer Related Domain (contextsuffreintymore .fun in TLS SNI)"; flow:established,to_server; tls.sni; bsize:25; content:"contextsuffreintymore.fun"; fast_pattern; reference:md5,a105e53b26d14ee11b4099ca980c3a66; classtype:domain-c2; sid:2050077; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_01_16, deployment Perimeter, deprecation_reason Age, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_15, reviewed_at 2024_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)
Jan 16, 2024, 12:00 PM
Apr 15, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 15, 2025, 8:34 PM
rules/emerging-malware.rules