unsquashfs rootfs.bin Now you can edit files in squashfs-root/ . After you edited the root filesystem (e.g., added a telnet daemon), you need to rebuild the .bin so the bootloader accepts it.
| Chip Family | Example Devices | Typical XOR Key | | :--- | :--- | :--- | | | Wyze Cam v2, Xiaomi 360 Camera | 0x51 | | MStar T20/T21 | Older IP cameras, Dash cams | 0xA5 | | Infinity 6 (IMG) | SigmaStar SSC335, SSC333 | 0x00 (No XOR) | | MSTAR 6A series | TCL Roku TVs (2016-2018) | Auto-detect | | Novatek? | Not supported (Different tool) | N/A |
Whether you are trying to install OpenWrt on a discontinued MStar router, remove cloud dependencies from a smart camera, or simply learn how your TV boots Linux, mstar-bin-tool is the essential first step. mstar-bin-tool
python mstar-bin-tool.py -i my_tv_firmware.bin Output will show: Header size, XOR key detected, payload size, and suspected chip type. Let’s walk through the three most common workflows. Case 1: Unpacking a firmware dump for root access Scenario: You dumped the SPI flash of a IP camera based on MStar MSC313E and want to modify the startup scripts.
In the world of embedded systems, few things are as frustrating as encountering a proprietary file format. For developers, hobbyists, and security researchers working with MStar (now part of MediaTek) based devices—such as smart TVs, IP cameras, set-top boxes, and car infotainment systems—the .bin file extension often represents a significant roadblock. unsquashfs rootfs
# 1. Run the extractor python mstar-bin-tool.py -x firmware_dump.bin -o ./unpacked cd unpacked ls -la
Note: Newer MediaTek chips (MTK 9xxx) use a different architecture and are not supported. Even with a good tool, firmware extraction can fail. Here is how to diagnose common errors. Error: "Unsupported magic bytes" Cause: The file is either not MStar, or it is encrypted with a non-standard key. Fix: Open the file in HxD or xxd . Look for MSTAR or SIGM . If missing, run binwalk first; it might be a U-Boot image directly. Error: "CRC Mismatch" Cause: The firmware is corrupted, or you passed the wrong XOR key. Fix: Try brute-forcing the XOR key: | Not supported (Different tool) | N/A |
python mstar-bin-tool.py -x firmware.bin --extract kernel --output kernel.bin While not exhaustive, mstar-bin-tool works reliably on:
unsquashfs rootfs.bin Now you can edit files in squashfs-root/ . After you edited the root filesystem (e.g., added a telnet daemon), you need to rebuild the .bin so the bootloader accepts it.
| Chip Family | Example Devices | Typical XOR Key | | :--- | :--- | :--- | | | Wyze Cam v2, Xiaomi 360 Camera | 0x51 | | MStar T20/T21 | Older IP cameras, Dash cams | 0xA5 | | Infinity 6 (IMG) | SigmaStar SSC335, SSC333 | 0x00 (No XOR) | | MSTAR 6A series | TCL Roku TVs (2016-2018) | Auto-detect | | Novatek? | Not supported (Different tool) | N/A |
Whether you are trying to install OpenWrt on a discontinued MStar router, remove cloud dependencies from a smart camera, or simply learn how your TV boots Linux, mstar-bin-tool is the essential first step.
python mstar-bin-tool.py -i my_tv_firmware.bin Output will show: Header size, XOR key detected, payload size, and suspected chip type. Let’s walk through the three most common workflows. Case 1: Unpacking a firmware dump for root access Scenario: You dumped the SPI flash of a IP camera based on MStar MSC313E and want to modify the startup scripts.
In the world of embedded systems, few things are as frustrating as encountering a proprietary file format. For developers, hobbyists, and security researchers working with MStar (now part of MediaTek) based devices—such as smart TVs, IP cameras, set-top boxes, and car infotainment systems—the .bin file extension often represents a significant roadblock.
# 1. Run the extractor python mstar-bin-tool.py -x firmware_dump.bin -o ./unpacked cd unpacked ls -la
Note: Newer MediaTek chips (MTK 9xxx) use a different architecture and are not supported. Even with a good tool, firmware extraction can fail. Here is how to diagnose common errors. Error: "Unsupported magic bytes" Cause: The file is either not MStar, or it is encrypted with a non-standard key. Fix: Open the file in HxD or xxd . Look for MSTAR or SIGM . If missing, run binwalk first; it might be a U-Boot image directly. Error: "CRC Mismatch" Cause: The firmware is corrupted, or you passed the wrong XOR key. Fix: Try brute-forcing the XOR key:
python mstar-bin-tool.py -x firmware.bin --extract kernel --output kernel.bin While not exhaustive, mstar-bin-tool works reliably on: