The tool uses a config.ini file or command-line arguments to specify the input file and the desired action. Unpacking: Command: python mstar-bin-tool.py -u firmware.bin
mksquashfs rootfs_edit new_rootfs.sqsh -comp xz
The most common task is removing unwanted applications ( sysem.img ). To do so: mstar-bin-tool-master
: This section merges the individual files—such as boot.img , recovery.img , and system.img —aligned sequentially by 4-byte spacing.
: Recompiles modified or custom components back into a flashable firmware file. extract_keys.py : Extracts AES and RSA-public keys directly from the The tool uses a config
It verifies header integrity before unpacking and warns about mismatched CRCs. The repacking mode recalculates the correct header length and checksum – a feature missing from many generic tools.
python3 pack.py configs/letv-x355pro-full.ini modified_update.bin Use code with caution. : Recompiles modified or custom components back into
within the repository for technical insights into MStar bootloaders. Kenotrontv guide
Understanding the MStar Bin Tool: A Guide to Extracting and Modifying Firmware