ET EXPLOIT_KIT NDSW/NDSX Javascript Inject

Query · suricata

flow:established,to_client;
http.response_body;
content:"|3b|if|28|ndsj|3d 3d 3d|undefined|29 7b|function"; fast_pattern;
content:"parseInt"; distance:0;
content:"HttpClient|3d|function|28 29|"; distance:0;
Raw source ET EXPLOIT_KIT NDSW/NDSX Javascript Inject · 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 EXPLOIT_KIT NDSW/NDSX Javascript Inject";
    flow:established,to_client;
    http.response_body;
    content:"|3b|if|28|ndsj|3d 3d 3d|undefined|29 7b|function"; fast_pattern;
    content:"parseInt"; distance:0;
    content:"HttpClient|3d|function|28 29|"; distance:0;
    reference:url,blog.sucuri.net/2022/06/analysis-massive-ndsw-ndsx-malware-campaign.html;
    classtype:trojan-activity;
    sid:2044410; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_28;
)

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