I am new to all this and this box is an amazing eye-opener. I learned a lot, especially enumeration and linux privilege escalation. many thanks to all the hints provided here. and a big thanks to @kbotnen . for your patience and very good hints. and of course, the user who created this box. can’t find the username (sorry about that)
i guess there is never such thing as “too much enumeration”. really enjoyed this box.