ET INFO Request for PDF via PowerShell

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".pdf"; endswith;
http.user_agent;
content:"WindowsPowerShell/"; fast_pattern;
Raw source ET INFO Request for PDF via PowerShell · 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 $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET INFO Request for PDF via PowerShell";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".pdf"; endswith;
    http.user_agent;
    content:"WindowsPowerShell/"; fast_pattern;
    reference:md5,544a65bfe51385bb148f23a4e3f140d6;
    classtype:misc-activity;
    sid:2044024; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_01_30, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_30;
)

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