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If you are struggling to get the firmware out of your device, this is the video for you!
In this video I will explain the possible ways we can use to to get the firmware of our IoT device.
I will do a practical example, of one of these possible ways. I will connect the PC to the UART of our sample device, I will analyze the boot log, I will access the command line interface of the boot loader, and I will dump the firmware, exploiting the dump command available in the boot loader. I will use a couple of scripts, do dump the entire EEPROM in an hexadecimal ASCII text file, and, then, to convert back this file in binary form to get the exact image of the EEPROM.
********* Links with additional Information
The sample router (Gemtek WVRTM-127ACN) on
The sample router (Gemtek WVRTM-127ACN) reverse engineered on GitHub, includes scripts to dump the EEPROM to a text file and to convert it back to binary
TTL Serial Adapter (affiliate link):
PuTTY, the terminal
Curl, command line tool for transferring data with
Wget, retrieving files with
Mitmproxy, a free and open source interactive HTTPS
OpenOcd, On Chip
U-Boot, The Universal Boot
Buildroot, a simple, efficient and easy-to-use tool to generate embedded Linux systems through
Binwalk, a fast, easy to use tool for analyzing, reverse engineering, and extracting firmware
SOIC8 SOP8 Flash Chip IC Test Clips Socket Adpter BIOS/24/25/93/95 Programmer (affiliate link):