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;)