ET EXPLOIT Javascript Initiating Remote Server Search with Window's Search-MS URI Handler

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"<script>"; startswith;
content:"window.location.href"; distance:0;
content:"search-ms:query="; distance:0;
content:"&crumb=location:"; distance:0;
content:"DavWWWRoot&displayname="; distance:0; fast_pattern;
content:"</script>"; endswith;
Raw source ET EXPLOIT Javascript Initiating Remote Server Search with Window's Search-MS URI Handler · 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 Javascript Initiating Remote Server Search with Window's Search-MS URI Handler";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"<script>"; startswith;
    content:"window.location.href"; distance:0;
    content:"search-ms:query="; distance:0;
    content:"&crumb=location:"; distance:0;
    content:"DavWWWRoot&displayname="; distance:0; fast_pattern;
    content:"</script>"; endswith;
    reference:url,trellix.com/en-us/about/newsroom/stories/research/beyond-file-search-a-novel-method.html;
    classtype:trojan-activity;
    sid:2047014; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_08_01, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_01;
)

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