ET WEB_CLIENT GENERIC Possible IE Memory Corruption CollectGarbage with DOM Reset

Query · suricata

flow:established,to_client;
file_data;
content:"unescape"; nocase;
content:"%u"; nocase;
content:"CollectGarbage"; nocase; fast_pattern;
content:"innerHTML"; nocase;
pcre:"/^\s*?=\s*?(?:undefined|false|null|-?0|NaN|\x22\x22|\x27\x27)/Rsi";
Raw source ET WEB_CLIENT GENERIC Possible IE Memory Corruption CollectGarbage with DOM Reset · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET WEB_CLIENT GENERIC Possible IE Memory Corruption CollectGarbage with DOM Reset";
    flow:established,to_client;
    file_data;
    content:"unescape"; nocase;
    content:"%u"; nocase;
    content:"CollectGarbage"; nocase; fast_pattern;
    content:"innerHTML"; nocase;
    pcre:"/^\s*?=\s*?(?:undefined|false|null|-?0|NaN|\x22\x22|\x27\x27)/Rsi";
    classtype:attempted-user;
    sid:2019730; rev:3;
    metadata:affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2014_11_18, deployment Perimeter, confidence Low, signature_severity Major, tag Web_Client_Attacks, updated_at 2019_10_08;
)

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