ET WEB_SERVER FOX-SRT - Backdoor - CryptoPHP Shell C2 POST

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET WEB_SERVER FOX-SRT - Backdoor - CryptoPHP Shell C2 POST";
    flow:established,to_server;
    threshold:type limit, track by_src, count 1, seconds 600;
    http.method;
    content:"POST";
    http.request_body;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|serverKey|22|"; fast_pattern;
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|data|22|";
    content:"Content-Disposition|3a 20|form-data|3b 20|name=|22|key|22|";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"User-Agent";
    content:!"Cookie|0d 0a|";
    reference:url,blog.fox-it.com/2014/11/18/cryptophp-analysis-of-a-hidden-threat-inside-popular-content-management-systems/;
    classtype:command-and-control;
    sid:2019748; rev:4;
    metadata:created_at 2014_11_20, signature_severity Major, updated_at 2020_11_05;
)