ET MALWARE Donot Group Pult Downloader Activity (POST) M4

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Donot Group Pult Downloader Activity (POST) M4";
    flow:established,to_server;
    urilen:8<>28;
    http.method;
    content:"POST";
    http.uri;
    content:!"|2e|";
    http.content_type;
    content:"application/x-www-form-urlencoded"; bsize:33;
    http.request_body;
    content:"data="; startswith; fast_pattern;
    http.user_agent;
    content:!"Linux|3b|";
    content:!"iPhone|3b|";
    http.header_names;
    content:"|0d 0a|Content-Type|0d 0a|User-Agent|0d 0a|Host|0d 0a|Content-Length|0d 0a|Cache-Control|0d 0a 0d 0a|";
    content:!"Referer";
    reference:md5,3e8c4e12f511646b26633e5318788c81;
    classtype:trojan-activity;
    sid:2045233; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_04_28, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_01;
    target:src_ip;
)