Really good box, learned alot!
Here are some tips
User: Look at all the different services available to you, research all the different techniques to exploit them. once you have creds, use the higher port to get a shell. There’s a really useful tool someone posted here on the forums you can use to help.
Root: You should know by now what the role of this machine in a network is. If you’ve researched privilege escalation options for this, the “dog” you need to use should be apparent. If you’re having trouble getting the tool to work on the box, try switch to a meterpreter shell. From here, you should be able to see a path.