ET HUNTING Request To Suspicious Filename via Powershell (key)

Query · suricata

flow:established,to_server;
http.uri;
content:"/key"; startswith; bsize:4;
http.user_agent;
content:"Mozilla/"; startswith;
content:") WindowsPowerShell/"; distance:0; fast_pattern;
Raw source ET HUNTING Request To Suspicious Filename via Powershell (key) · 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 HUNTING Request To Suspicious Filename via Powershell (key)";
    flow:established,to_server;
    http.uri;
    content:"/key"; startswith; bsize:4;
    http.user_agent;
    content:"Mozilla/"; startswith;
    content:") WindowsPowerShell/"; distance:0; fast_pattern;
    reference:md5,5ec22f6399ec0c51d120d27ecd26f2be;
    classtype:bad-unknown;
    sid:2036267; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_04_19, deployment Perimeter, confidence Medium, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_04_19, reviewed_at 2024_12_02;
)

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