ET RETIRED Earth Preta PUBLOAD Activity M3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Earth Preta PUBLOAD Activity M3";
    flow:established,to_server;
    http.request_line;
    content:"POST /msdownload/update/v3/static/trustedr/en/"; fast_pattern;
    pcre:"/^[A-Za-z0-9]{25}/R";
    http.header;
    content:"If-None-Match|3a 20 22|";
    pcre:"/^[a-f0-9]{14}\x3a[a-f0-9]{1}/R";
    http.user_agent;
    content:"Microsoft-CryptoAPI/6.1";
    http.request_body;
    content:"FwMD"; startswith;
    reference:md5,2b1b305139c17bdcaff214d338a43531;
    reference:url,app.any.run/tasks/409aff8c-bd6b-43d4-b1e8-a2208bf338de/#;
    classtype:trojan-activity;
    sid:2050512; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, created_at 2024_01_26, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_03, reviewed_at 2024_10_03;
)