hardwaremedium

Defusal

hackthebox

Task: Analyze AVR firmware for Arduino Mega bomb defusal device with keypad, LCD, and LED matrix. Solution: Extract XOR-encrypted LED bitmap frames from .data section and decrypt with password 7355608 (CS:GO bomb code) to reveal flag characters displayed on 8x8 LED matrix.

$ ls tags/ techniques/

reverse_engineering xor firmware embedded avr spi lcd atmega2560 arduino_mega led_matrix max7219 keypad ledcontrol

xor_decryptiondata_section_extractionavr_disassemblyled_bitmap_renderingsymbol_analysisperipheral_identification

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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