ET MALWARE VNCStartServer BOT Variant CnC Beacon

alert tcp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE VNCStartServer BOT Variant CnC Beacon";
    flow:established,to_server;
    dsize:<100;
    content:"|00 00 00 19 00 00 00|"; offset:1; depth:7;
    content:"|01 00 00|"; distance:1; within:3;
    content:"BOT-"; distance:1; within:7; fast_pattern;
    content:"|00|"; endswith;
    reference:md5,d66956e0ee70a60e19a4f310339d28a9;
    classtype:command-and-control;
    sid:2035524; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_12, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, updated_at 2021_11_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)