ET MALWARE Observed TrustConnect RAT Domain (networkservice .cyou in TLS SNI)
Sourceet/open
CreatedFebruary 17, 2026
UpdatedFebruary 17, 2026
Classificationtrojan-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed TrustConnect RAT Domain (networkservice .cyou in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".networkservice.cyou"; endswith; fast_pattern; classtype:trojan-activity; sid:2067802; rev:1; metadata:attack_target Client_Endpoint, created_at 2026_02_17, deployment Perimeter, malware_family TrustConnect, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_02_17;)
Metadata
attack targetClient_Endpoint
created at2026_02_17
deploymentPerimeter
malware familyTrustConnect
confidenceHigh
signature severityCritical
tagDescription_Generated_By_Proofpoint_Nexus
updated at2026_02_17
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