ET INAPPROPRIATE Evil Keitaro to Adult Websites Set-Cookie Inbound (3f06b)

Query · suricata

flow:established,to_client;
http.cookie;
content:"3f06b=eyJ0e"; fast_pattern;
pcre:"/^[A-Z0-9_\-.]{20,300}\x3b/Ri";
Raw source ET INAPPROPRIATE Evil Keitaro to Adult Websites Set-Cookie Inbound (3f06b) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET INAPPROPRIATE Evil Keitaro to Adult Websites Set-Cookie Inbound (3f06b)";
    flow:established,to_client;
    http.cookie;
    content:"3f06b=eyJ0e"; fast_pattern;
    pcre:"/^[A-Z0-9_\-.]{20,300}\x3b/Ri";
    classtype:exploit-kit;
    sid:2063364; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_07_08, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Minor, tag Keitaro_TDS, tag Description_Generated_By_Proofpoint_Nexus, tag Keitaro, updated_at 2025_07_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1189, mitre_technique_name Drive_by_Compromise;
)

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