Cobaltbaltstrike_Beacon_x86

rule Cobaltbaltstrike_Beacon_x86
{
  meta:
    author = "Avast Threat Intel Team"
    description = "Detects CobaltStrike payloads"
    reference = "https://github.com/avast/ioc"
    id = "6ffaafe6-2758-53e4-b5b8-6d8350baf428"
  strings:
    // x86 default MZ header
    $h01 = { 4D 5A E8 00 00 00 00 5B 89 DF 52 45 55 89 E5 81 C3 ?? ?? ?? ?? FF D3 68 }
    // decoded config blob
    $h11 = { 00 01 00 01 00 02 ?? ?? 00 02 00 01 00 02 ?? ?? 00 }
    // xored config blob v3
    $h12 = { 69 68 69 68 69 6B ?? ?? 69 6B 69 68 69 6B ?? ?? 69 }
    // xored config blob v4
    $h13 = { 2E 2F 2E 2F 2E 2C ?? ?? 2E 2C 2E 2F 2E 2C ?? ?? 2E }
  condition:
    $h01 and
    any of ($h1*)
}