ET HUNTING Suspected transformNode Obfuscation in XML document DOM

Query · suricata

flow:established,to_client;
file.data;
content:"<?xml";
content:"loadXML(unescape("; fast_pattern;
content:"transformNode("; distance:0;
target:dest_ip;
Raw source ET HUNTING Suspected transformNode Obfuscation in XML document DOM · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Suspected transformNode Obfuscation in XML document DOM";
    flow:established,to_client;
    file.data;
    content:"<?xml";
    content:"loadXML(unescape("; fast_pattern;
    content:"transformNode("; distance:0;
    reference:url,elastic.co/security-labs/grimresource;
    reference:url,learn.microsoft.com/en-us/previous-versions/windows/desktop/ms761399(v=vs.85);
    reference:url,github.com/decalage2/oletools/issues/851;
    classtype:bad-unknown;
    sid:2056635; rev:3;
    metadata:attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_10_10, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_05_22;
    target:dest_ip;
)

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