# 1. Dump full firmware from device or extract from provided .bin/.pkg
./mstar_tool dump -i firmware.bin -o extracted/
After making changes, repack with:
./repack_mstar.sh -i ./unpacked -o modified_firmware.bin -c mstar_checksum
The repack tool:
Output: modified_firmware.bin – ready for flashing.
Before discussing the tools, we must understand the motivation. Users seek these tools for three primary reasons:
A robust version of the Dump Mstar Unpack Repack Tool offers the following capabilities:
The Dump Mstar Unpack Repack Tool is an indispensable but fragile set of utilities for working with legacy MStar firmware. Success heavily depends on the exact chipset and firmware version. For modern MediaTek/MStar devices, vendor signing and encryption have made these tools obsolete unless paired with key extraction or bootrom exploits.
Alternative Recommendation: For new projects, avoid reverse-engineering MStar firmware; instead, use mainline U-Boot and OpenWrt if the SoC is supported. For analysis, prefer hardware debugging (UART, JTAG) over blind repacking.
Guide to the Mstar Unpack/Repack Tool for Firmware Modification
Modifying firmware on Mstar-based devices—like Smart TVs and IP cameras—requires specialized tools to handle the unique
file structures used by these processors. Whether you're porting an Android build or simply backing up a device, the Mstar Unpack/Repack Tool is the standard for the job. Core Features of the Toolset These utilities, often found in repositories like dipcore/mstar-bin-tool on GitHub , provide several critical functions: : Decompiles the main Mstar firmware binary (e.g., CtvUpgrade.bin ) into its individual component partitions. : Reassembles modified partitions back into a flashable extract_keys.py
: Retrieves AES and RSA-public keys from the MBOOT binary, which are necessary for decrypting recovery.img on newer builds with secure boot enabled. secure_partition.py
: Re-encrypts and signs modified images so they remain compatible with the device's security checks. Prerequisites for Use
To use these scripts effectively, ensure your environment is set up with: Python 3.4+
: Python 3.8 is highly recommended for the best compatibility with modern scripts. mstar-bin-tool : Download the latest master branch from dipcore's GitHub UBoot_win_Tools
: Often needed as a secondary utility for specific image types like recovery.img Archive Utility : Tools like
are frequently required to handle compressed partition files. Step-by-Step: Unpacking Your First Firmware
The most common workflow involves decompressing a stock firmware update to access the root filesystem. : Place the mstar-bin-tool folder in your root directory (e.g., C:/mstar-bin-tool-master/ Target File
: Create a work folder and copy your firmware (typically named CtvUpgrade.bin ) into it. : Open a command prompt and run the following: unpack.py C:/work/CtvUpgrade.bin C:/work/unpacked/ : The script will populate the folder with partitions like Handling Secure Boot Many modern Mstar builds have SECURE_BOOT enabled. If you find your recovery.img is encrypted, you must use the extract_keys.py
script to get the AES key from your device's MBOOT before you can modify them. Dump Mstar Unpack Repack Tool
For further community support and advanced GUI versions of these tools (like MstarBinTool-GUI), check active forums such as KenotronTV Are you working on a specific device model or trying to bypass a secure boot restriction? qdvbp/mstar-tools - GitHub
MStar Unpack Repack Tool (commonly known as mstar-bin-tool ) is a specialized collection of Python scripts and utilities used to decompile and modify firmware files ( CtvUpgrade.bin
) for Android-based Smart TVs and devices powered by MStar processors. Key Features & Capabilities Firmware Unpacking : Deconstructs monolithic firmware into individual components like recovery.img system.img Security Key Extraction : Includes tools like extract_keys.py to retrieve public keys from the
binary, which are required to decrypt secure partitions on newer TV models. Repacking (Packing)
: Reassembles modified partitions back into a flashable firmware file using a configuration file (
) that defines the target hardware environment and partition offsets. Partition Encryption
: Supports encrypting and signing modified partitions (e.g., ) to satisfy the SECURE_BOOT requirements of modern MStar builds. Commonly Used Components Description
The primary script for extracting data from MStar firmware files.
Used to create a new firmware bin from a set of images and a config file. extract_keys.py Extracts the necessary AES/RSA keys from for decryption. A low-level utility (often in
folder) for manual encryption/decryption of images using hex keys. MstarBinTool-GUI
A graphical interface version that simplifies partition selection and config generation. Basic Workflow for Modifying Firmware 不染尘/mstar-bin-tool - Gitee
The Dump Mstar Unpack Repack Tool (also known as DMURTP or Dump Mstar Unpack Repack Tool Pro) is a specialized software utility designed for technicians and developers to manage and modify firmware for televisions and devices using Mstar chipsets.
This training video demonstrates how to use the DMURTP software to extract and unpack dump files from eMMC storage:
In the world of firmware modification and smart TV repair, handling Mstar bin files is a crucial skill. This guide covers how to dump, unpack, and repack Mstar firmware using specialized tools.
Whether you are looking to modify system applications, change boot logos, or recover a bricked television, mastering these tools is essential. What is an Mstar Firmware File?
Mstar semiconductor chips power millions of smart televisions and set-top boxes worldwide. Their firmware is typically distributed as a single large binary file (usually named install.img or upgrade_loader.pkg).
This binary file is a container. It holds various partitions required for the TV to function, such as: Mboot: The master bootloader. Kernel: The core operating system files. System: The Android framework and applications. Userdata: User settings and local storage.
Modifying these individual components requires a tool to split the massive binary file into its respective parts and put it back together after editing. Key Features of Mstar Unpack Repack Tools The repack tool:
A reliable Mstar Unpack Repack tool provides several essential functions for firmware developers:
Header Parsing: Automatically detects the structure and offsets of the firmware container.
Partition Extraction: Safely extracts .img files (like system and recovery) from the main bin.
Script Generation: Creates the necessary flashing scripts (like ursc.txt or mstar.scripts) used by the bootloader.
CRC Verification: Recalculates checksums so the TV does not reject the modified firmware.
Repacking: Compresses the edited partitions back into a flashable format. How to Dump Mstar Firmware
Before you can unpack anything, you need to acquire the firmware. If you cannot find the official firmware online, you can dump it directly from a working TV board using hardware tools. 1. Hardware Requirements
VGA to USB ISP Programmer: Tools like the RT809F or RT809H are industry standards.
ISP Cables: To connect to the TV mainboard via the VGA or HDMI ISP port.
Secure CRT or Putty: Software to communicate with the TV via serial console. 2. The Dumping Process
Connect your ISP programmer to the TV's VGA/ISP port and your computer.
Open your programmer software and identify the eMMC or SPI flash chip. Read the memory contents. Save the read data as a .bin file on your computer. How to Unpack Mstar Firmware
Once you have your firmware file, you can begin the extraction process. While several scripts exist on GitHub and specialized forums, the general workflow remains identical. Step-by-Step Extraction
Place the File: Put your Mstar bin file in the same directory as your unpacking tool.
Run the Command: Open your command line (or terminal) and execute the extraction script. Example command: python mstar_unpack.py install.img
Analyze the Output: The tool will create a new folder filled with the extracted partitions (e.g., system.img, boot.img, tvcustomer.img). Modifying the Extracted Files
With the partitions extracted, you can now make your desired modifications.
To modify system apps: You will need to mount the system.img file in a Linux environment or use a Windows img extractor to add or remove APKs. Output: modified_firmware
To change the boot logo: Locate the boot.img or a dedicated logo.img partition and swap the visual assets.
Warning: Always keep backups of your original, unmodified files before making any changes. How to Repack Mstar Firmware
After successfully editing your partitions, you must repack them into a single file that the TV can read and execute. Step-by-Step Repacking
Update the Scripts: Ensure your firmware script file reflects any changes in file sizes or new partitions you added.
Execute the Repack Tool: Run the repacking command via your terminal. Example command: python mstar_repack.py new_firmware_folder
Wait for CRC Check: The tool will bundle the files and calculate the new CRC32 checksums.
Transfer to USB: Once finished, copy the newly generated bin file to a FAT32 formatted USB drive to flash onto your TV. Troubleshooting Common Errors
Working with low-level firmware often leads to errors. Here are the most common issues and how to fix them: "CRC Error" or "Verification Failed"
The Cause: The TV detected that the file was modified and blocked it for security.
The Fix: Ensure your repack tool is correctly calculating the header CRC. You may need to manually update the CRC values in your script file. "File Too Large"
The Cause: Your modified system or user partition exceeds the physical storage limits allocated in the partition table.
The Fix: Remove unnecessary applications or reduce the size of your boot animation/logo to free up space. TV Stuck in Bootloop
The Cause: A corrupted system file or an incompatible modification.
The Fix: Flash the original, unmodified dump file via ISP programmer to restore the TV to a working state.
To help me give you the best advice for your project, please let me know: What is the exact model number of your Mstar chip or TV? Are you using Windows or Linux for this project?
What is your main goal (e.g., changing the boot logo, removing bloatware, or fixing a bricked TV)?
Here is a practical guide to modifying an MStar-based Android TV firmware.
# Unpack MStar-packed rootfs partition
./mstar_unpack -f extracted/rootfs.bin -o rootfs/
If you change the file size of the rootfs, you must update the superblock located at offset 0x400 in the flash dump. Failure to do this results in a "Kernel Panic - Unable to mount root fs."