ET RETIRED [ANY.RUN] Echida Botnet Check-In M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED [ANY.RUN] Echida Botnet Check-In M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/connect_bot.php"; fast_pattern; endswith;
    http.content_type;
    content:"application/x-www-form-urlencoded";
    http.header_names;
    content:!"Referer|0d 0a|";
    content:!"User-Agent|0d 0a|";
    http.request_body;
    content:"data="; startswith;
    base64_decode:bytes 120, relative;
    base64_data;
    content:"|28 2a 29|Microsoft";
    reference:md5,68e3359674ee7d49550b09e7ff69dcce;
    reference:url,twitter.com/ViriBack/status/1698693553168236869;
    classtype:command-and-control;
    sid:2047921; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2023_09_05, deployment Perimeter, former_category MALWARE, malware_family echida_botnet, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_02, reviewed_at 2024_10_02;
    target:src_ip;
)