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

SID: 2069639Rev: 12 views
Sourceet/open
Fileemerging-malware.rules
CreatedJune 3, 2026
UpdatedJune 3, 2026
Classificationdomain-c2
alert tls $HOME_NET any -> any any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (movementby .cyou) in TLS SNI"; flow:established,to_server; tls.sni; bsize:15; content:"movementby.cyou"; fast_pattern; nocase; reference:md5,2093245e62e25936521d7bbd55075c20; classtype:domain-c2; sid:2069639; rev:1; metadata:tls_state TLSEncrypt, created_at 2026_06_03, deployment Perimeter, malware_family Lumma_Stealer, confidence High, signature_severity Critical, updated_at 2026_06_03, 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
2093245e62e25936521d7bbd55075c20
Google SearchBrave Search

Metadata

tls stateTLSEncrypt
created at2026_06_03
deploymentPerimeter
malware familyLumma_Stealer
confidenceHigh
signature severityCritical
updated at2026_06_03
mitre tactic idTA0011
mitre tactic nameCommand_And_Control
mitre technique idT1071
mitre technique nameApplication_Layer_Protocol

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