If you are a security researcher: bookmark this guide, set up your VM, and practice on legally obtained samples (e.g., old shareware that you own). Each unpack will teach you something new.
If you can tell me a bit more, I can sharpen this draft for you: unpack enigma 5x full
If you encounter an "Enigma 5x Full" in a puzzle (e.g., a CTF challenge or an escape room), you cannot brute force it. Here is the professional approach to unpacking it: If you are a security researcher: bookmark this