ET INFO Landing Page with Form Exfil to submit-form .com

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
http.response_body;
content:"<form";
content:"action="; distance:0;
content:"submit-form.com"; fast_pattern; distance:0;
content:"</form>"; distance:0;
Raw source ET INFO Landing Page with Form Exfil to submit-form .com · 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 INFO Landing Page with Form Exfil to submit-form .com";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"<form";
    content:"action="; distance:0;
    content:"submit-form.com"; fast_pattern; distance:0;
    content:"</form>"; distance:0;
    classtype:bad-unknown;
    sid:2066714; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_13, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, updated_at 2026_01_13;
)

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