Reverse

Reverse Engineering

Java language

jd-gui

Emulation of GBA

https://problemkaputt.de/no$gba.zip
https://mgba.io/downloads.html
https://github.com/SiD3W4y/GhidraGBA

Identification of the file type

file <filename>

xor file contents

xor under the command line

cat password | xor 0xff > password.bin