ET EXPLOIT_KIT Clearfake Set-Cookie Inbound M1

Query · suricata

flow:established,to_client;
http.cookie;
content:"3445a25f23472ac97543677e8cd9631d="; fast_pattern;
pcre:"/^[A-Z0-9]{50,300}\x3b/Ri";
target:dest_ip;
Raw source ET EXPLOIT_KIT Clearfake Set-Cookie Inbound M1 · 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 EXPLOIT_KIT Clearfake Set-Cookie Inbound M1";
    flow:established,to_client;
    http.cookie;
    content:"3445a25f23472ac97543677e8cd9631d="; fast_pattern;
    pcre:"/^[A-Z0-9]{50,300}\x3b/Ri";
    reference:url,rmceoin.github.io/malware-analysis/clearfake/;
    classtype:exploit-kit;
    sid:2069918; rev:1;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_06_11, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Minor, tag Exploit_Kit, tag ClearFake, tag compromised_website, updated_at 2026_06_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
    target:dest_ip;
)

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