ET MALWARE W32.Geodo/Emotet Checkin


Query · suricata

flow:established,to_server;
urilen:1;
flowbits:set,ETPRO.Emotet;
http.method;
content:"GET";
http.user_agent; bsize:76;
content:"Mozilla|2f|5|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SLCC1|3b 20 2e|NET|20|CLR|20|1|2e|1|2e|4322|29|"; fast_pattern; startswith;
http.cookie;
pcre:"/[a-z0-9]{3,4}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+$/i";
http.header_names;
content:!"|0d 0a|Referer|0d 0a|";
content:!"|0d 0a|Accept";
content:"|0d 0a|Cookie|0d 0a|"; startswith;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|";

Rule dependencies

Feeds into

Raw source ET MALWARE W32.Geodo/Emotet Checkin · 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 -> $EXTERNAL_NET [7080,8080,443] (
    msg:"ET MALWARE W32.Geodo/Emotet Checkin";
    flow:established,to_server;
    urilen:1;
    flowbits:set,ETPRO.Emotet;
    http.method;
    content:"GET";
    http.user_agent; bsize:76;
    content:"Mozilla|2f|5|2e|0|20 28|compatible|3b 20|MSIE|20|8|2e|0|3b 20|Windows|20|NT|20|5|2e|1|3b 20|SLCC1|3b 20 2e|NET|20|CLR|20|1|2e|1|2e|4322|29|"; fast_pattern; startswith;
    http.cookie;
    pcre:"/[a-z0-9]{3,4}=(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})+$/i";
    http.header_names;
    content:!"|0d 0a|Referer|0d 0a|";
    content:!"|0d 0a|Accept";
    content:"|0d 0a|Cookie|0d 0a|"; startswith;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|";
    reference:md5,dacdcd451204265ad6f44ef99db1f371;
    classtype:command-and-control;
    sid:2024272; rev:7;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_12_01, deployment Perimeter, malware_family Geodo, malware_family Emotet, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_03_11;
)

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