ET WEB_CLIENT Evil Keitaro Set-Cookie Inbound (e3b0c4_12)
Sourceet/open
CreatedFebruary 10, 2026
UpdatedFebruary 10, 2026
Classificationtrojan-activity
alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET WEB_CLIENT Evil Keitaro Set-Cookie Inbound (e3b0c4_12)"; flow:established,to_client; http.cookie; content:"e3b0c4_12="; fast_pattern; classtype:trojan-activity; sid:2067447; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, created_at 2026_02_10, deployment Perimeter, malware_family KeitaroTDS, confidence High, signature_severity Major, updated_at 2026_02_10;)
Metadata
affected productAny
attack targetClient_Endpoint
created at2026_02_10
deploymentPerimeter
malware familyKeitaroTDS
confidenceHigh
signature severityMajor
updated at2026_02_10
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