ET MALWARE Enfal CnC POST

Query · suricata

flow:to_server,established;
http.method;
content:"POST";
http.uri;
content:".cgi"; fast_pattern; endswith;
http.header;
pcre:"/^Host\x3a[^\r\n]+\r\nContent-Length\x3a\x20\d+\r\n(?:Cache-Control|Pragma)\x3a\x20no-cache\r\n(?:\r\n)?$/mi";
http.header_names;
content:!"User-Agent|0d 0a|";
content:!"Referer|0d 0a|";
content:!"Content-Type|0d 0a|";
Raw source ET MALWARE Enfal CnC POST · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Enfal CnC POST";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:".cgi"; fast_pattern; endswith;
    http.header;
    pcre:"/^Host\x3a[^\r\n]+\r\nContent-Length\x3a\x20\d+\r\n(?:Cache-Control|Pragma)\x3a\x20no-cache\r\n(?:\r\n)?$/mi";
    http.header_names;
    content:!"User-Agent|0d 0a|";
    content:!"Referer|0d 0a|";
    content:!"Content-Type|0d 0a|";
    reference:md5,f1b341d3383b808ecfacfa22dcbe9196;
    classtype:command-and-control;
    sid:2021079; rev:6;
    metadata:created_at 2015_05_09, performance_impact Significant, signature_severity Major, updated_at 2024_03_25;
)

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