ET MALWARE Observed Win32/Lumma Stealer Related Domain (limbcre .cyou) in TLS SNI

7.0.3 5.0SID: 2071287Rev: 1Enabled4 views

Fileemerging-malware.rules

CreatedJuly 24, 2026

UpdatedJuly 24, 2026

Classificationdomain-c2

alert tls $HOME_NET any -> any any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (limbcre .cyou) in TLS SNI"; flow:established,to_server; tls.sni; bsize:12; content:"limbcre.cyou"; fast_pattern; nocase; reference:md5,b59aa904941960345d342e67cc6a9932; classtype:domain-c2; sid:2071287; rev:1; metadata:tls_state TLSEncrypt, created_at 2026_07_24, deployment Perimeter, malware_family Lumma_Stealer, confidence High, signature_severity Critical, updated_at 2026_07_24, 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	b59aa904941960345d342e67cc6a9932 Google Search Brave Search

Metadata

tls stateTLSEncrypt

created at2026_07_24

deploymentPerimeter

malware familyLumma_Stealer

confidenceHigh

signature severityCritical

updated at2026_07_24

mitre tactic idTA0011

mitre tactic nameCommand_And_Control

mitre technique idT1071

mitre technique nameApplication_Layer_Protocol

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