ET MALWARE Win32/Zeprox.B Checkin

Query · suricata

flow:to_server,established;
http.method;
content:"GET";
http.uri;
content:".php?a=n|60|e|3e|"; fast_pattern;
http.header;
content:"Proxy-Connection|3a|";
http.header_names;
content:!"Referer|0d 0a|";
http.content_len;
byte_test:0,=,0,0,string,dec;
Raw source ET MALWARE Win32/Zeprox.B 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 Win32/Zeprox.B Checkin";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".php?a=n|60|e|3e|"; fast_pattern;
    http.header;
    content:"Proxy-Connection|3a|";
    http.header_names;
    content:!"Referer|0d 0a|";
    http.content_len;
    byte_test:0,=,0,0,string,dec;
    reference:md5,bc27f28e5fe47b78202fd3108d39aac1;
    reference:md5,38c89cca7806fde08bba82b3cb533e5a;
    reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=Backdoor%3AWin32/Zeprox.B;
    classtype:command-and-control;
    sid:2020203; rev:8;
    metadata:created_at 2015_01_16, malware_family Win32_Zeprox_B, signature_severity Major, updated_at 2020_12_22;
)

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