ET USER_AGENTS Observed Suspicious UA (.NET Framework Client)

Query · suricata

flow:established,to_server;
http.user_agent; bsize:21;
content:".NET Framework Client";
Raw source ET USER_AGENTS Observed Suspicious UA (.NET Framework Client) · 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 USER_AGENTS Observed Suspicious UA (.NET Framework Client)";
    flow:established,to_server;
    http.user_agent; bsize:21;
    content:".NET Framework Client";
    classtype:bad-unknown;
    sid:2030586; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_07_24, deployment Perimeter, confidence High, signature_severity Informational, updated_at 2024_03_10, reviewed_at 2024_03_05;
)

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