Wow, this box was definitely a challenge for me. Took me a few days.
Foothold: Enumerate. Once you find it, use it to enumerate even further, and look very carefully, you might miss something important. The last step to get the foothold can be a little frustrating but fight through it because you’re almost there.
User: Basic enumeration. If you get stuck, you might wanna try to look for something specific and really “reach out” for it.
Root: Be like El Chapo. Dig a tunnel and escape.