CobaltStrike_Resources_Beacon_x64_v3_14

rule CobaltStrike_Resources_Beacon_x64_v3_14
{
  meta:
    description = "Cobalt Strike's sleeve/beacon.x64.dll Versions 3.14"
    hash =  "297a8658aaa4a76599a7b79cb0da5b8aa573dd26c9e2c8f071e591200cf30c93"
    rs2 = "39b9040e3dcd1421a36e02df78fe031cbdd2fb1a9083260b8aedea7c2bc406bf"
		author = "gssincla@google.com"
		reference = "https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse"
		date = "2022-11-18"

    id = "d69171e3-86f4-5187-8874-5eee2045f746"
  strings:

    /*
      8B D0          mov     edx, eax
      49 8B CA       mov     rcx, r10; Src
      48 83 C4 28    add     rsp, 28h
      E9 B1 1F 00 00 jmp     f_OTH__Command_69
      8B D0          mov     edx, eax
      49 8B CA       mov     rcx, r10; Source
      48 83 C4 28    add     rsp, 28h
    */

    $version_sig = { 8B D0 49 8B CA 48 83 C4 28 E9 B1 1F 00 00 8B D0 49 8B CA
                     48 83 C4 28 }
    
    /*
      80 34 28 ??       xor     byte ptr [rax+rbp], 69h
      48 FF C0          inc     rax
      48 3D 00 10 00 00 cmp     rax, 1000h
      7C F1             jl      short loc_1800196BD
    */
    $decoder = { 80 34 28 ?? 48 FF C0 48 3D 00 10 00 00 7C F1 }

  condition:
    all of them
}