ET RETIRED Win32/Speedbit Variant Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Win32/Speedbit Variant Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".ashx?";
    content:"pid=";
    content:"aid=";
    content:"mid="; fast_pattern;
    pcre:"/^[a-f0-9]{8}-[a-f0-9]{12}/Ri";
    content:"shver=";
    content:"uid=";
    pcre:"/^[A-F0-9]{8}-(?:[A-F0-9]{4}-){3}[A-F0-9]{12}/Ri";
    content:"rcnt=";
    content:"instd=";
    content:"subinst=";
    http.header_names;
    content:!"Referer";
    http.request_body;
    content:"d="; startswith;
    reference:md5,1b74381a8834b161743c8b1b36e3ee29;
    classtype:pup-activity;
    sid:2038704; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_08_31, deployment Perimeter, former_category ADWARE_PUP, performance_impact Low, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;
)