ET MALWARE GCleaner Downloader Activity M11

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE GCleaner Downloader Activity M11";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/api/files/client/s"; fast_pattern;
    isdataat:!3,relative;
    http.user_agent;
    content:"|7c|"; offset:3; depth:1;
    content:"|7c|"; offset:11; depth:1;
    content:"|7c|"; offset:14; depth:1;
    pcre:"/^[A-Za-z0-9#]{3}\|[A-Za-z0-9#]{7}\|[A-Za-z0-9#]{2}\|[A-Za-z0-9#]{4}$/";
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
    threshold:type limit, track by_src, seconds 180, count 1;
    reference:md5,51162ded57e5aeda4eb0bbe6ed5d52f0;
    classtype:trojan-activity;
    sid:2049040; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2023_11_01, deployment Perimeter, malware_family GCleaner, performance_impact Moderate, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_11_01, reviewed_at 2023_11_01;
    target:src_ip;
)