Haven’t got root yet, but I still want to give my thoughts on user since i see a lot of people almost getting frustrated.
First thing i thought when i saw the name of the box was, sure this is going to be super CTF-like, just like the rating says. So if you want something more life like, maybe do another box, Jarvis is a lot more “real life”. CTF-like boxes are an awesome way for people to learn how to use their skills in a different way.
Rant over.
User: There are already a lot of hints in this thread, but for the low port, think about ways to get information out of such a file.
Then. If you have a stack of hay and you need to find a needle in it, what is the better approach. Take one hand full and start looking though that? or take the entire haystack and shake it until you find what you are looking for? Think about the service, are there any tools to get the entire picture?
happy hunting 