UEFI_RETool : A Tool For UEFI Firmware Reverse Engineering

UEFI_RETool is a tool for UEFI firmware reverse engineering.

UEFI firmware analysis with uefi_retool.py script

Usage

• Copy ida_plugin/uefi_analyser.py script and ida_plugin/uefi_analyser directory to IDA plugins directory
• Edit config.json file
  • PE_DIR is a directory that contains all executable images from the UEFI firmware
  • DUMP_DIR is a directory that contains all components from the firmware filesystem
  • LOGS_DIR is a directory for logs
  • IDA_PATH and IDA64_PATH are paths to IDA Pro executable files
• Run pip install -r requirements.txt
• Run python uefi_retool.py command to display the help message

Commands

python uefi_retool.py

Usage: uefi_retool.py [OPTIONS] COMMAND [ARGS]…

Options:
–help Show this message and exit.

Commands:
get-images Get executable images from UEFI firmware.
get-info Analyze the entire UEFI firmware.
get-pp Get a list of proprietary protocols in the UEFI firmware.

Get-Images

python uefi_retool.py get-images –help

Usage: uefi_retool.py get-images [OPTIONS] FIRMWARE_PATH
Get executable images from UEFI firmware. Images are stored in “modules”
directory.

Options:
–help Show this message and exit.

Example

python uefi_retool.py get-images test_fw/fw-tp-x1-carbon-5th.bin

Get-Info

python uefi_retool.py get-info –help

Usage: uefi_retool.py get-info [OPTIONS] FIRMWARE_PATH
Analyze the entire UEFI firmware. The analysis result is saved to .json
file.

Options:
-w, –workers INTEGER Number of workers (8 by default).
–help Show this message and exit.

Example:

python uefi_retool.py get-info -w 6 test_fw/fw-tp-x1-carbon-5th.bin

Get-PP

python uefi_retool.py get-pp –help

Usage: uefi_retool.py get-pp [OPTIONS] FIRMWARE_PATH
Get a list of proprietary protocols in the UEFI firmware. The result is
saved to .json file.

Options:
-w, –workers INTEGER Number of workers (8 by default).
–help Show this message and exit.

Example:

python uefi_retool.py get-pp -w 6 test_fw/fw-tp-x1-carbon-5th.bin

Additional Tools

• tools/update_edk2_guids.py is a script that updates protocol GUIDs list from edk2 project

IDA plugin

IDA plugin for UEFI analysis

Analyser & Protocol explorer

Usage

• Copy uefi_analyser and uefi_analyser.py to your %IDA_DIR%/plugins directory
• Open the executable UEFI image in IDA and go to Edit -> Plugins -> UEFI analyser (alternatively, you can use the key combination Ctrl+Alt+U)

Example

• Before analysis

• After analysis

• Protocol explorer window

Dependency Browser & Dependency Graph

Usage

• Analyse the firmware using uefi_retool.py python uefi_retool.py get-info FIRMWARE_PATH
• Load <LOGS_DIR>/<FIRMWARE_NAME>-all-info.json file to IDA (File -> UEFI_RETool...)

• alternatively, you can use the key combination Ctrl+Alt+J)

Example

• Dependency browser window

• Dependency graph