alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Initial Redirect to Landing Page with slowAES Cookie"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?"; content:"=1"; fast_pattern; distance:0; endswith; http.cookie; content:"="; pcre:"/^[a-f0-9]{32}/Ri"; reference:url,blog.kwiatkowski.fr/testcookie; reference:url,github.com/samuraitruong/php-cookie-challenge/blob/36c0547159d06bbcec66dc06b8ac5c13e3afb658/src/cookieChallenge.js; classtype:misc-activity; sid:2068936; rev:1; metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_04_22, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Informational, updated_at 2026_04_22;)