ET MALWARE MS_D0wnl0ad3r Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE MS_D0wnl0ad3r Checkin";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".php?hwid=";
    http.header;
    content:"en-gb|5c|Accept";
    http.user_agent;
    content:"Gecko/20070725 Firefox/2.0.0.6";
    http.header_names;
    content:!"Referer";
    classtype:command-and-control;
    sid:2026363; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_09_25, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_25;
)