Run whoami /priv . You will likely see enabled.

Use tools like Feroxbuster or Gobuster to find hidden directories.

This is the "key" to the room. The UnrealIRCd 3.2.8.1 backdoor works by sending a crafted \x00 character to the AB command.

The challenge starts with an multi-front enumeration of the perimeter. You aren't just looking for one entry point; you're hunting for leaked credentials across three different platforms: