ET INFO Observed slowAES Library To Generate Cookie Challenge Header

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET INFO Observed slowAES Library To Generate Cookie Challenge Header";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    http.response_body;
    content:"slowaes.decrypt("; nocase; fast_pattern;
    content:"document.cookie";
    content:"location.href";
    reference:url,blog.kwiatkowski.fr/testcookie;
    reference:url,github.com/samuraitruong/php-cookie-challenge/blob/36c0547159d06bbcec66dc06b8ac5c13e3afb658/src/cookieChallenge.js;
    classtype:misc-activity;
    sid:2068904; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_04_22, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2026_04_22;
    target:src_ip;
)