ET MALWARE Foudre Checkin M4

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Foudre Checkin M4";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/en/?2"; startswith; fast_pattern;
    http.host;
    pcre:"/^[a-f0-9]{8}\.(?:s(?:pac|it)e|net|top)$/Wm";
    http.request_body;
    content:"f="; startswith;
    content:"&c="; distance:0;
    content:"&u="; distance:0;
    content:"&v="; distance:0;
    content:"&s="; distance:0;
    content:"&mi="; distance:0;
    content:"&t="; distance:0;
    content:"&txt="; distance:0;
    content:"&e=EOF"; endswith;
    reference:url,twitter.com/ShadowChasing1/status/1339190981703266304;
    reference:md5,2d459929135993959cacceb0dd81a813;
    reference:md5,d01bcca6255a4f062fc59a014f407532;
    classtype:command-and-control;
    sid:2031418; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_12_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_12_16;
)