Rainbow is a bootkit like HWID spoofer for Windows. It abuses several hooks in EFI runtime services and uses clever DKOM to hide hardware serials before any boot-time drivers are even started.

In order to use rainbow spoofer, you need to load it. First, obtain a copy of rainbow.efi and a copy of EDK2 efi shell. Now follow these steps:

1. Extract downloaded efi shell and rename file Shell.efi (should be in folder UefiShell/X64) to bootx64.efi
2. Format some USB drive to FAT32
3. Create following folder structure:

USB:.
 │   rainbow.efi
 │
 └───EFI
      └───Boot
              bootx64.efi

4. Boot from the USB drive
5. An UEFI shell should start, change directory to your USB (FS0 should be the USB since we are booting from it) and list files:

FS0:
ls

6. You should see file rainbow.efi, if you do, load it:

load rainbow.efi

7. Now you should see output from rainbow. If it was successful, exit and boot into Windows (change to Windows boot media - usually FS1 - and run \EFI\Boot\bootx64.efi)

Check out UnknownCheats.

See VisualEfi. Please note that I've made some changes to the EDK2 directory.