alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET INFO Exfil to FormSpark Form"; flow:established,to_client; http.stat_code; content:"302"; http.location; content:"submitted.formspark.io?_formId="; fast_pattern; content:"&_referer="; distance:0; classtype:bad-unknown; sid:2066745; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_01_14, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2026_01_14;)