ET RETIRED BotLoader Retrieving Additional Payloads

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED BotLoader Retrieving Additional Payloads";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/api/support"; startswith;
    content:"|3f|file|3d|m_"; distance:0; fast_pattern;
    content:".dll"; endswith;
    http.header_names;
    content:!"|0d 0a|User-Agent|0d 0a|";
    reference:md5,4fd927530935327e0405ea5ddabc18ef;
    classtype:trojan-activity;
    sid:2045781; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_19, deployment Perimeter, former_category MALWARE, malware_family BotLoader, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_10_01, reviewed_at 2024_10_01;
    target:src_ip;
)