ET MALWARE Backdoor.TurlaCarbon.A C2 HTTP Request

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Backdoor.TurlaCarbon.A C2 HTTP Request";
    flow:to_server,established;
    http.method;
    content:"POST";
    http.uri;
    content:"?uid=";
    content:"&context="; distance:0;
    content:"&mode=text&"; fast_pattern; distance:0;
    content:"data=";
    pcre:"/\?uid=\d+&context=\w+&mode=text&data=\w+$/";
    reference:url,blog.gdatasoftware.com/blog/article/analysis-of-project-cobra.html;
    classtype:command-and-control;
    sid:2020241; rev:3;
    metadata:created_at 2015_01_22, signature_severity Major, updated_at 2020_05_14;
)