ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 104

alert tcp $HOME_NET any -> $EXTERNAL_NET !5938 (
    msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 104";
    flow:established,to_server;
    app-layer-protocol:!tls;
    stream_size:server,<,5;
    dsize:>11;
    content:"|78 9c|"; offset:9; depth:21; fast_pattern;
    byte_test:4,<,65535,-14,relative,little;
    byte_test:4,<,65535,-10,relative,little;
    byte_jump:4,-10,relative,little,post_offset 3;
    isdataat:!2,relative;
    pcre:"/^.{9,28}\x78\x9c/s";
    reference:url,researchcenter.paloaltonetworks.com/2015/09/musical-chairs-multi-year-campaign-involving-new-variant-of-gh0st-malware/;
    classtype:command-and-control;
    sid:2022401; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2016_01_22, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, performance_impact Significant, confidence Medium, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2024_07_03;
)