ET MALWARE Win32/AutoIt.NU Miner Dropper CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/AutoIt.NU Miner Dropper CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/?id="; depth:5;
    content:"&pt="; within:20; fast_pattern;
    http.user_agent;
    pcre:"/^[a-f0-9]{32}$/i";
    http.request_body;
    pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/i";
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.header_names;
    content:"Accept";
    content:!"Accept-";
    content:!"Cache";
    content:!"Referer";
    reference:md5,cd7a49513771efd9d4de873956ef8af5;
    classtype:command-and-control;
    sid:2025598; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_06_21, deployment Perimeter, malware_family Autoit_NU, performance_impact Low, confidence High, signature_severity Major, tag Dropper, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_18;
)