ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 103

alert tcp $HOME_NET any -> $EXTERNAL_NET !443 (
    msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 103";
    flow:established,to_server;
    app-layer-protocol:!tls;
    stream_size:server,<,5;
    dsize:>11;
    content:"|78 9c|"; offset:9; fast_pattern;
    byte_jump:4,-10,relative,from_beginning,post_offset -1;
    isdataat:!2,relative;
    pcre:"/^[\x20-\x7e]+?.{8}\x78\x9c/s";
    reference:md5,b0c2a5a3cfef4e759979b7d0869b7612;
    reference:url,researchcenter.paloaltonetworks.com/2015/09/musical-chairs-multi-year-campaign-involving-new-variant-of-gh0st-malware/;
    classtype:command-and-control;
    sid:2021753; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2015_09_09, 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;
)