ET HUNTING Javascript Prototype Pollution Attempt via prototype in HTTP Body

Query · suricata

flow:established,to_server;
http.request_body;
content:"prototype";
pcre:"/constructor.{0,4}(?:[\x22\x27\x5b\x2e]|\x25(?:2[27]|5[bB]|2[eE]))prototype(?:[\x2e\x5b\x5d]|\x5c?[\x22\x27]|\x25(?:2[eE]|5[bBdD]))/";
target:dest_ip;
Raw source ET HUNTING Javascript Prototype Pollution Attempt via prototype in HTTP Body · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET HUNTING Javascript Prototype Pollution Attempt via prototype in HTTP Body";
    flow:established,to_server;
    http.request_body;
    content:"prototype";
    pcre:"/constructor.{0,4}(?:[\x22\x27\x5b\x2e]|\x25(?:2[27]|5[bB]|2[eE]))prototype(?:[\x2e\x5b\x5d]|\x5c?[\x22\x27]|\x25(?:2[eE]|5[bBdD]))/";
    reference:url,portswigger.net/web-security/prototype-pollution;
    classtype:web-application-activity;
    sid:2066199; rev:1;
    metadata:attack_target Server, tls_state TLSDecrypt, created_at 2025_12_09, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence Medium, signature_severity Major, updated_at 2025_12_09;
    target:dest_ip;
)

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