ET MALWARE TrueBot/Silence.Downloader Keep-Alive

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".php?dns="; fast_pattern;
pcre:"/^[a-f0-9]{8}$/Rs";
http.header_names;
content:"|0d 0a|Host|0d 0a 0d 0a|"; depth:10; endswith;
Raw source ET MALWARE TrueBot/Silence.Downloader Keep-Alive · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE TrueBot/Silence.Downloader Keep-Alive";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".php?dns="; fast_pattern;
    pcre:"/^[a-f0-9]{8}$/Rs";
    http.header_names;
    content:"|0d 0a|Host|0d 0a 0d 0a|"; depth:10; endswith;
    reference:md5,c2a00949ddacfed9ed2ef83a8cb44780;
    classtype:trojan-activity;
    sid:2026560; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_29, deployment Perimeter, malware_family TrueBot, malware_family Silence_Downloader, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_09_16;
)

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