ET MALWARE Win32/DarkRAT CnC Activity

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/DarkRAT CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:!".php";
    http.request_body;
    content:"request=YUhkcFpEM"; depth:17; fast_pattern;
    pcre:"/^[A-Za-z0-9\/\+\=]{100,}$/Rsi";
    http.header_names;
    content:!"Referer";
    reference:url,github.com/albertzsigovits/malware-writeups/tree/master/DarkRATv2;
    classtype:command-and-control;
    sid:2027886; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_08_15, deployment Perimeter, malware_family DarkRAT, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_10_20;
)