ET WEB_CLIENT Observed JavaScript Event Listener with Clipboard Data

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"<script>";
content:"addEventListener|28 27|copy|27|"; distance:0;
content:"clipboardData|2e|setData|28 27|text|2f|plain|27|"; fast_pattern; distance:0;
content:"sh"; distance:0;
content:"|5c|n"; distance:0;
content:"</script>"; distance:0;
Raw source ET WEB_CLIENT Observed JavaScript Event Listener with Clipboard Data · 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 WEB_CLIENT Observed JavaScript Event Listener with Clipboard Data";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"<script>";
    content:"addEventListener|28 27|copy|27|"; distance:0;
    content:"clipboardData|2e|setData|28 27|text|2f|plain|27|"; fast_pattern; distance:0;
    content:"sh"; distance:0;
    content:"|5c|n"; distance:0;
    content:"</script>"; distance:0;
    reference:url,www.bleepingcomputer.com/news/security/dont-copy-paste-commands-from-webpages-you-can-get-hacked;
    classtype:web-application-activity;
    sid:2034860; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_01_04, deployment Perimeter, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_07;
)

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