This challenge gives us the following description:
You’re in. It’s time to find secrets that may have been hidden. You can use a command to find hidden files and folders.
What is the hidden file that you find?
In Scope: Logged into the SSH machine.
Flag format: XXX{.XXXXXX_XXXXXX.XXX}
This part What is the hidden file that you find? send me directly to dot files (files prefixed by a dot, which makes them hidden by default. Using the -a flag to show hidden files we can see a .secret_coords.txt file, which is the answer to this challenge: IGE{.secret_coords.txt}
