ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 85

alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 85";
    flow:established,to_server;
    stream_size:server,<,5;
    dsize:>11;
    content:"|7f 9f|"; offset:8;
    byte_jump:4,-10,relative,little,from_beginning,post_offset -1;
    isdataat:!2,relative;
    pcre:"/^[\x20-\x7e]+?.{8}\x7f\x9f/s";
    content:!"POST /";
    content:!"microsoft.com";
    reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Backdoor%3AWin32/PcClient.ZR&ThreatID=-2147325231;
    reference:md5,6bc0070240a714175e44dd2d6bf98481;
    classtype:command-and-control;
    sid:2020786; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_03_28, 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_08_31;
)