ET MALWARE Foudre Checkin M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Foudre Checkin M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/201"; depth:4;
    content:"/?c="; distance:1; within:4; fast_pattern;
    content:"&u="; distance:0;
    content:"&v="; distance:0;
    content:"&s="; distance:0;
    content:"&f="; distance:0;
    content:"&mi="; distance:0;
    content:"&b="; distance:0;
    content:"&t="; distance:0;
    http.host;
    pcre:"/^[a-f0-9]{8}\.(?:s(?:pac|it)e|net|top)$/";
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:url,researchcenter.paloaltonetworks.com/2017/08/unit42-prince-persia-ride-lightning-infy-returns-foudre/;
    classtype:command-and-control;
    sid:2031410; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_08_02, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_11;
)