ET HUNTING Downloaded Powershell Script Detects AV Product

Query · suricata

flow:established,to_client;
http.response_body;
content:"Get|2d|WmiObject|20 2d|Namespace|20 22|root|5c|SecurityCenter";
content:"|22 20 2d|Class|20 22|AntiVirusProduct|22 3b|"; within:30; fast_pattern;
Raw source ET HUNTING Downloaded Powershell Script Detects AV Product · 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 HUNTING Downloaded Powershell Script Detects AV Product";
    flow:established,to_client;
    http.response_body;
    content:"Get|2d|WmiObject|20 2d|Namespace|20 22|root|5c|SecurityCenter";
    content:"|22 20 2d|Class|20 22|AntiVirusProduct|22 3b|"; within:30; fast_pattern;
    reference:md5,8f9269eaded8f1046b1fef6408150e5c;
    classtype:bad-unknown;
    sid:2038754; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_07, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_06, reviewed_at 2024_01_26;
)

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