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Rev: 3 • Dec 2, 2024, 12:00 PMET MALWARE Observed Win32/Lumma Stealer Related Domain (impend-differ .biz in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (impend-differ .biz in TLS SNI)"; flow:established,to_server; tls.sni; bsize:17; content:"impend-differ.biz"; fast_pattern; reference:md5,bed38a4c21d98f5c188b7b7b3a1848ef; classtype:domain-c2; sid:2057970; rev:3; metadata:tls_state TLSEncrypt, created_at 2024_12_02, deployment Perimeter, deprecation_reason Age, malware_family Lumma_Stealer, performance_impact Low, confidence High, signature_severity Critical, updated_at 2025_03_07, reviewed_at 2025_03_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)
Dec 2, 2024, 12:00 PM
Mar 7, 2025, 12:00 PM
Dec 3, 2024, 4:00 PM
May 30, 2025, 12:04 AM
rules/emerging-malware.rules