ET MALWARE [ANY.RUN] Socks5Systemz HTTP C2 Connection M1

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE [ANY.RUN] Socks5Systemz HTTP C2 Connection M1";
    flow:established, to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"?"; depth:20;
    pcre:"/^(?:[^=]+=((?:[a-f0-9]){2}){78,104})$/";
    http.user_agent;
    content:"Mozilla|2f|5|2e|0|20 28|Windows|3b 20|U|3b 20|MSIE|20|9|2e|0|3b 20|Windows|20|NT|20|9|2e|0|3b 20|en|2d|US|29|"; bsize:57; fast_pattern;
    http.header_names;
    content:"|0d 0a|Host|0d 0a|User-Agent|0d 0a 0d 0a|"; bsize:22;
    http.host;
    content:"."; offset:7; depth:1;
    pcre:"/^(?:[a-z]{7})\.(?:[a-z]{2,5})$/";
    reference:md5,7308178fbfc957dec7a304ad131e0b5b;
    reference:url,app.any.run/tasks/685b5fb6-1b1a-4f4d-92f5-8a9593275a92;
    reference:url,community.emergingthreats.net/t/et-malware-socks5systemz/1155/;
    classtype:trojan-activity;
    sid:2049467; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_04, deployment Perimeter, malware_family Socks5Systemz, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_01_17;
    target:src_ip;
)