ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 51

alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 51";
    flow:established,to_server;
    stream_size:server,<,5;
    dsize:>11;
    content:"|7a 9c|"; offset:8;
    byte_jump:4,-10,relative,little,from_beginning, post_offset -1;
    isdataat:!2,relative;
    pcre:"/^[\x20-\x7e]+?.{8}\x7a\x9c/s";
    reference:url,www.securelist.com/en/descriptions/10155706/Trojan-GameThief.Win32.Magania.eogz;
    reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Backdoor%3AWin32/PcClient.ZR&ThreatID=-2147325231;
    reference:md5,4b70f302c72c94d0b9214808d9f72419;
    classtype:command-and-control;
    sid:2020610; rev:4;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_03_04, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, performance_impact Significant, confidence Medium, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2021_09_09;
)