Platbox – UEFI And SMM Assessment Tool

• Dumps the platform registers that are interesting security-wise
  • Flash Locks
  • MMIO and Remapping Locks
  • SMM Base and Locks
  • MSRs
• RW access to the PCI configuration space of devices.
• RW to physical memory and virtual memory.
• Allows allocating physical memory and map memory to user mode with Platbox
• Read and Write MSRs.
• Dump SPI Flash content (BIOS) into a file.
• Basic dumb SMI Fuzzer.
• Dump S3 Bootscript (from SMM-Lockbox) into a file.
• Dump EFI Memory Map (Linux only for now).
• List UEFI variables.
• Supports Linux and Windows.
• Supports Intel and AMD.

Example of ‘chipset’ command output for an AMD platform

Project Structure of Platbox

The project is divided as follows:

• PlatboxDrv: kernel drivers used for Linux and Windows.
• PlatboxLib: the usermode component that loads the kernel driver and provides access to all the previously listed features.
• PlatboxCli: a console client that uses the library.
• Pocs: an example of a program using features from the libary.

Compilation StepsWindows

mkdir build
cd build
cmake -G "Visual Studio 17 2022" -A x64 -S .. -B "build64"
cmake --build build64/ --target platbox_cli

Release Build

cmake -G "Visual Studio 17 2022" -A x64 -S .. -B "build64" 
cmake --build build64/ --target platbox_cli --config Release

Download Platbox