ET PHISHING Tycoon 2FA Fake Captcha Check

Query · suricata

flow:established,to_client;
http.response_body;
content:"|3c|div|20|class|3d 22|captcha|2d|box|22 20|id|3d 22|captchaBox|22 3e|";
content:"|3c|div|20|class|3d 22|checkbox|22 20|id|3d 22|checkbox|22 20|role|3d 22|checkbox|22|";
content:"|3c|strong|3e|HumanCheck|3c 2f|strong|3e|"; fast_pattern;
content:"checkbox|2e|addEventListener|28 27|keydown";
content:"verifyInstant|28 29|";
target:dest_ip;
Raw source ET PHISHING Tycoon 2FA Fake Captcha Check · 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 PHISHING Tycoon 2FA Fake Captcha Check";
    flow:established,to_client;
    http.response_body;
    content:"|3c|div|20|class|3d 22|captcha|2d|box|22 20|id|3d 22|captchaBox|22 3e|";
    content:"|3c|div|20|class|3d 22|checkbox|22 20|id|3d 22|checkbox|22 20|role|3d 22|checkbox|22|";
    content:"|3c|strong|3e|HumanCheck|3c 2f|strong|3e|"; fast_pattern;
    content:"checkbox|2e|addEventListener|28 27|keydown";
    content:"verifyInstant|28 29|";
    reference:url,proofpoint.com/us/blog/email-and-cloud-threats/tycoon-2fa-phishing-kit-mfa-bypass;
    classtype:credential-theft;
    sid:2065671; rev:2;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_11_05, deployment Perimeter, deployment SSLDecrypt, signature_severity Critical, tag Phishing, updated_at 2026_01_29, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1566, mitre_technique_name Phishing;
    target:dest_ip;
)

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