50 lines
2.2 KiB
Markdown
50 lines
2.2 KiB
Markdown
# ESP32
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## Tools
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* [espressif/esptool](https://github.com/espressif/esptool) - Espressif SoC serial bootloader utility
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* [jmswrnr/esp32knife](https://github.com/jmswrnr/esp32knife) - Tools for ESP32 firmware dissection
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* [scientifichackers/ampy](https://github.com/scientifichackers/ampy) - Utility to interact with a MicroPython board over a serial connection
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* [ESPWebTool](https://esp.huhn.me/) - Flash your ESP32 or ESP8266 through your browser.
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## Flashing
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The ESP32 microprocessor uses the Xtensa instruction set, use `Tensilica Xtensa 32-bit little-endian` in Ghidra.
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* Flash a new firmware with `espressif/esptool`
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```ps1
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esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32 write_flash --flash_mode dio --flash_size 2MB --flash_freq 40m 0x1000 build/bootloader/bootloader.bin 0x8000 build/partition_table/partition-table.bin 0x10000 build/ble_ctf.bin
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esptool.py -p /dev/ttyS5 -b 115200 --after hard_reset write_flash --flash_mode dio --flash_freq 40m --flash_size detect 0x8000 build/partition_table/partition-table.bin 0x1000 build/bootloader/bootloader.bin 0x10000 build/esp32-wifi-penetration-tool.bin
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```
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* Flash a new firmware with `scientifichackers/ampy` (MicroPython)
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```ps1
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ampy --port /dev/ttyUSB0 put bla.py
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```
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* Dump the flash
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```ps1
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esptool -p COM7 -b 115200 read_flash 0 0x400000 flash.bin
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```
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* Dissect the flash
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```ps1
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python esp32knife.py --chip=esp32 load_from_file ./flash.bin
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```
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* Flash the new firmware
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```ps1
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# repair the checksum
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python esp32fix.py --chip=esp32 app_image ./patched.part.3.factory
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esptool -p COM7 -b 115200 write_flash 0x10000 ./patched.part.3.factory.fixed
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```
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## References
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* [ESP32-reversing - BlackVS](https://github.com/BlackVS/ESP32-reversing)
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* [ESP32 Wi-Fi Penetration Tool - GitHub - Exploring possibilities of ESP32 platform to attack on nearby Wi-Fi networks](https://github.com/risinek/esp32-wifi-penetration-tool)
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* [ESP32 Wi-Fi Penetration Tool - Documentation - Exploring possibilities of ESP32 platform to attack on nearby Wi-Fi networks](https://risinek.github.io/esp32-wifi-penetration-tool/) |