ET MALWARE Observed Win32/Lumma Stealer Related Domain (oak-smash .cyou in TLS SNI)
Sourceet/open
CreatedNovember 25, 2024
UpdatedMarch 7, 2025
Classificationdomain-c2
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (oak-smash .cyou in TLS SNI)"; flow:established,to_server; tls.sni; bsize:14; content:"oak-smash.cyou"; fast_pattern; reference:md5,15804fb040678a2337a9320bc8475d47; classtype:domain-c2; sid:2057829; 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;)
References
| md5 | 15804fb040678a2337a9320bc8475d47 |
Metadata
tls stateTLSEncrypt
created at2024_11_25
deploymentPerimeter
deprecation reasonAge
malware familyLumma_Stealer
performance impactLow
confidenceHigh
signature severityCritical
updated at2025_03_07
reviewed at2025_03_07
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1071
mitre technique nameApplication_Layer_Protocol
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