Vault Breaker

“We have recovered an old file named ‘vault.exe’ from a legacy system, designed in a rush by a former intern. Rumor has it that only basic security patches were applied, and many believe the password was carelessly left as ‘Plain Text’ inside the binary itself. Your mission is to look beyond the binary walls, find the intern’s mistake, and retrieve the secret key to unlock the vault. Can you expose the hardcoded truth?”