Awesome
umap
Windows UEFI bootkit that loads a generic driver manual mapper without using a UEFI runtime driver.
Usage
-
Setup a FAT32 formatted flashdrive with the following filesystem structure:
\EFI\Boot\bootx64.efi
wherebootx64.efi
is the compiled bootkit. -
Boot from the flashdrive.
-
Use the usermode program
umap
to manually map a driver. The driver must be designed to function without a real driver object. However, in place of the driver object parameter is a pointer to the pool allocated for the driver if needed.- For example:
umap test.sys
- For example:
Compiling
The mapper
and umap
projects can both be compiled using standard Visual Studio (with WDK for mapper
). Keep in mind that any changes to mapper
must be updated in its corresponding bootkit resource. One could also just replace mapper
with their own driver (make sure to undo the bootkit hook), which renders the usermode component irrelevant. By default, the mapper's DriverEntry
is called before the boot-time driver acpiex.sys
is initialized (typically the 2nd driver in the load order after WDF). This can be easily changed if needed.
The bootkit by default expects an edk2
directory in the repository's root with the EDK2 header and library files combined. You can use VisualUEFI for both of these, then simply combine the directories. Or, change the project layout to fit your UEFI development environment.
Note
This PoC was only tested on Windows 10 1803, 1809, 1903, 1909, and 2004.