ET MALWARE Win32/CopperStealer CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/CopperStealer CnC Activity";
    flow:established,to_server;
    http.method;
    content:"GET";
    urilen:>175;
    http.uri;
    content:".php?info=MzE4TZT-"; fast_pattern;
    http.accept_lang;
    content:"ko-KR,ko|3b|"; startswith;
    http.header;
    content:"upgrade-insecure-requests|3a 20|1|0d 0a|";
    http.header_names;
    content:!"Referer";
    reference:md5,12e9b4bbe894ab0bf357182a11d4c535;
    classtype:command-and-control;
    sid:2031916; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_14, deployment Perimeter, malware_family Win32_CopperStealer, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_11_14;
)