ET MALWARE EVILNUM CnC Host Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE EVILNUM CnC Host Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/register.php";
    http.request_body;
    content:"av="; depth:3;
    content:"&cpu-name="; fast_pattern; distance:0;
    content:"&ref="; distance:0;
    content:"&user="; distance:0;
    reference:url,blog.prevailion.com/2020/05/phantom-in-command-shell5.html;
    classtype:command-and-control;
    sid:2030125; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_05_07, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_17;
)