Rule History

SID: 2057817 • Source: et/open

Versions (2)

Version DetailsCurrent

Rev: 3 • Nov 25, 2024, 12:00 PM

Message:

ET MALWARE Observed Win32/Lumma Stealer Related Domain (farewellnzu .icu in TLS SNI)

Rule:

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (farewellnzu .icu in TLS SNI)"; flow:established,to_server; tls.sni; bsize:15; content:"farewellnzu.icu"; fast_pattern; reference:md5,3ca9ca734f501c8de4270556f80f0f60; classtype:domain-c2; sid:2057817; rev:3; metadata:tls_state TLSEncrypt, created_at 2024_11_25, 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;)

Created:

Nov 25, 2024, 12:00 PM

Updated:

Mar 7, 2025, 12:00 PM

DB Created:

Dec 3, 2024, 4:00 PM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules