alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING Legacy HTTP Cookie Observed ($Version)"; flow:established,to_server; http.cookie; content:"|24|Version|3d|1|3b 20|"; fast_pattern; startswith; pcre:"/^[^\x3d]*?\x3d[\x22\x27]/R"; reference:url,portswigger.net/research/stealing-httponly-cookies-with-the-cookie-sandwich-technique; classtype:web-application-activity; sid:2059720; rev:1; metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_01_27, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Minor, tag Exploit, updated_at 2025_01_27, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)