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;)