ET MALWARE GoBrut/StealthWorker Requesting Brute Force List (flowbit set)

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE GoBrut/StealthWorker Requesting Brute Force List (flowbit set)";
    flow:established,to_server;
    flowbits:set,ET.PhpMyAdminBrute.1;
    threshold:type limit, count 1, seconds 120, track by_src;
    http.method;
    content:"GET";
    http.uri;
    content:"?worker=php_b"; fast_pattern; endswith;
    http.user_agent;
    content:"Ubuntu|3b 20|Linux|20|x86_64";
    http.accept_enc;
    content:"gzip"; depth:4; endswith;
    http.header_names;
    content:!"Referer";
    reference:md5,1c315f9487ad20c3ac72747f13968507;
    reference:url,blog.yoroi.company/research/gobrut-a-new-golang-botnet/;
    reference:url,blog.yoroi.company/research/new-gobrut-version-in-the-wild/;
    classtype:trojan-activity;
    sid:2033717; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_14, deployment Perimeter, malware_family PhpMyAdminBrute, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_09_17;
)