ET MALWARE W32/Gaudox Checkin

Query · suricata

flow:to_server,established;
http.uri;
content:".php"; endswith;
http.user_agent;
content:"Mozilla/5.0 (X11|3b 20|Linux i586|3b 20|rv|3a|31.0) Gecko/20100101 Firefox/31.0"; fast_pattern; bsize:66;
http.request_body;
pcre:"/^.{0,15}[^\x20-\x7e\r\n]/s";
http.content_type;
content:"application/x-www-form-urlencoded"; bsize:33;
http.header_names;
content:!"Accept";
content:!"Referer|0d 0a|";
Raw source ET MALWARE W32/Gaudox 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 any (
    msg:"ET MALWARE W32/Gaudox Checkin";
    flow:to_server,established;
    http.uri;
    content:".php"; endswith;
    http.user_agent;
    content:"Mozilla/5.0 (X11|3b 20|Linux i586|3b 20|rv|3a|31.0) Gecko/20100101 Firefox/31.0"; fast_pattern; bsize:66;
    http.request_body;
    pcre:"/^.{0,15}[^\x20-\x7e\r\n]/s";
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:md5,5d662258fd506b87dc5d3f8fce1ff784;
    classtype:command-and-control;
    sid:2022505; rev:5;
    metadata:created_at 2016_02_12, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_07_07;
)

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