ET MALWARE Win32.Chroject.B Retrieving encoded payload

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:!".";
content:"/en-us/"; depth:7;
pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)$/R";
content:!"/im/";
http.start;
content:"=|20|HTTP/1.1|0d 0a|Accept|3a 20|*/*|0d 0a|"; fast_pattern;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Win32.Chroject.B Retrieving encoded payload · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Chroject.B Retrieving encoded payload";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:!".";
    content:"/en-us/"; depth:7;
    pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)$/R";
    content:!"/im/";
    http.start;
    content:"=|20|HTTP/1.1|0d 0a|Accept|3a 20|*/*|0d 0a|"; fast_pattern;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,6c8c988a8129ff31ad0e764e59b31200;
    classtype:trojan-activity;
    sid:2020746; rev:11;
    metadata:created_at 2015_03_25, performance_impact Significant, signature_severity Major, updated_at 2024_04_08;
)

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