Tags: xor reversing 

Rating:

Unpack binary with UPX and reverse engineer in ghidra to identify the XOR operation on the flag. Solve with GDB + Cyber-Chef.

Full video walkthrough: https://www.youtube.com/watch?v=deg0CQwwN-M&t=1523s

Original writeup (https://www.youtube.com/watch?v=deg0CQwwN-M&t=1523s).