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

SID: 2067738Rev: 10 views

Sourceet/open

CreatedFebruary 17, 2026

UpdatedFebruary 17, 2026

Classificationdomain-c2

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Win32/Lumma Stealer Related Domain (activitydmy .icu) in TLS SNI"; flow:established,to_server; tls.sni; dotprefix; content:".activitydmy.icu"; endswith; fast_pattern; reference:url,x.com/skocherhan/status/2023529013847929014; classtype:domain-c2; sid:2067738; rev:1; metadata:tls_state TLSEncrypt, created_at 2026_02_17, deployment Perimeter, malware_family Lumma_Stealer, performance_impact Low, confidence High, signature_severity Critical, updated_at 2026_02_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)

References

url	x.com/skocherhan/status/2023529013847929014

Metadata

tls stateTLSEncrypt

created at2026_02_17

deploymentPerimeter

malware familyLumma_Stealer

performance impactLow

confidenceHigh

signature severityCritical

updated at2026_02_17

mitre tactic idTA0011

mitre tactic nameCommand_And_Control

mitre technique idT1071

mitre technique nameApplication_Layer_Protocol

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