ET USER_AGENTS Suspicious User-Agent (RT/1.0)

Query · suricata

flow:established,to_server;
http.user_agent;
content:"RT/1.0"; bsize:6;
Raw source ET USER_AGENTS Suspicious User-Agent (RT/1.0) · Suricata
Esc
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 Suspicious User-Agent (RT/1.0)";
    flow:established,to_server;
    http.user_agent;
    content:"RT/1.0"; bsize:6;
    reference:md5,4c22c20fd816c11a3670100a40ac9dc0;
    classtype:trojan-activity;
    sid:2039422; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_10_17, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_28, reviewed_at 2025_07_14;
)

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