ET MALWARE Emotet Checkin

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/"; offset:1;
content:"/"; distance:0;
pcre:"/^\/[A-Za-z0-9]+\/[A-Za-z0-9]+\/$/";
http.header_names;
content:!"Accept-";
content:!"Referer|0d 0a|";
http.user_agent;
content:"MSIE 7.0|3b|"; fast_pattern;
content:"Windows NT 6.0"; within:15;
http.request_body;
pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
Raw source ET MALWARE Emotet Checkin · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Emotet Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/"; offset:1;
    content:"/"; distance:0;
    pcre:"/^\/[A-Za-z0-9]+\/[A-Za-z0-9]+\/$/";
    http.header_names;
    content:!"Accept-";
    content:!"Referer|0d 0a|";
    http.user_agent;
    content:"MSIE 7.0|3b|"; fast_pattern;
    content:"Windows NT 6.0"; within:15;
    http.request_body;
    pcre:"/^[\x20-\x7e\r\n]{0,20}[^\x20-\x7e\r\n]/";
    reference:md5,3083b68cb5c2a345972a5f79e735c7b9;
    classtype:command-and-control;
    sid:2019693; rev:7;
    metadata:created_at 2014_11_12, performance_impact Significant, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_22;
)

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