ET RETIRED Sharp Panda APT Related Activity M3

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED Sharp Panda APT Related Activity M3";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/org/background.php?Data="; fast_pattern; startswith;
    http.header_names;
    content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|";
    reference:md5,37e8ba415702f9f24e497bf6111e3e0c;
    classtype:trojan-activity;
    sid:2049931; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, created_at 2024_01_08, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_10_03, reviewed_at 2024_10_03;
    target:src_ip;
)