ET MALWARE DirectsX CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE DirectsX CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"AAAAAAAAAAAAAA";
    pcre:"/^\/(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/i";
    http.header;
    content:"X-MU-Session-ID|3a 20|"; fast_pattern;
    reference:url,public.gdatasoftware.com/Presse/Publikationen/Whitepaper/EN/GDATA_TooHash_CaseStudy_102014_EN_v1.pdf;
    classtype:command-and-control;
    sid:2026916; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_15, deployment Perimeter, malware_family DirectsX, performance_impact Low, confidence High, signature_severity Major, updated_at 2020_08_27;
)