ET RETIRED Truebot/Silence.Downloader No Tasking Response from Server

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"404NOTFOUND"; fast_pattern; startswith;
target:dest_ip;
Raw source ET RETIRED Truebot/Silence.Downloader No Tasking Response from Server · Suricata
Esc
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 RETIRED Truebot/Silence.Downloader No Tasking Response from Server";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"404NOTFOUND"; fast_pattern; startswith;
    reference:md5,f1a4e74e72390ef98c23f19589d3c7cd;
    reference:url,blog.talosintelligence.com/breaking-the-silence-recent-truebot-activity/;
    classtype:command-and-control;
    sid:2045298; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_02, deployment Perimeter, deployment SSLDecrypt, former_category MALWARE, malware_family TrueBot, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_17, reviewed_at 2025_04_17;
    target:dest_ip;
)

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