For the privesc there are 2 major points: messages on the dashboard (extremely important) and understanding of B** hij***.
If you’re stuck, try to answer these questions one by one.
- How many B** participants?
- What are they advertised (each of them)?
- Is there something interesting (see the messages mentioned above)?
- What is it?
- How could you get it in “normal” network, in the same LAN for example?
- Obviously, we have much more sophisticated case, so what we will do to reach our goal and how B** can help us?
Are you thoroughly investigated all links on B** in this thread? They have detailed instructions for similar cases.