ET MALWARE StartPage jsp checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE StartPage jsp checkin";
    flow:to_server,established;
    urilen:27<>40;
    threshold:type both,track by_src,count 2,seconds 60;
    http.method;
    content:"POST";
    http.uri;
    content:"/201"; fast_pattern;
    content:".jsp";
    pcre:"/^\/201\d{5,8}\/\d{6,11}\/\d{5,10}\.jsp$/";
    http.user_agent;
    content:"Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b 20|Windows NT 5.2|3b 20|.NET CLR 1.1.4322|3b 20|.NET CLR 2.0.50727|3b 20|InfoPath.1)"; bsize:101;
    http.header_names;
    content:!"Accept-Language|0d 0a|";
    content:!"Referer|0d 0a|";
    reference:md5,bb7bbb0646e705ab036d73d920983256;
    classtype:command-and-control;
    sid:2017967; rev:6;
    metadata:created_at 2014_01_14, performance_impact Significant, signature_severity Major, updated_at 2024_04_30;
)