This one took me wayyyy longer than anticipated. Learned a lot, screamed a little, but got it in the end! Congrats to everyone who got it so quickly. The path to root is something I will always keep in the toolbelt. Thank you to the box maker!
There’s probably enough here in the comments to get you going, but I’d like to offer a subtle methodical nudge.
To anyone struggling at privesc: Think about the logical flow of keeping persistence on a box. What’s the first thing you’d like to have happen? And what goes into that from the system’s perspective? I hope this helps someone. I was stuck here for a while.
Feel free to DM. You need to tell me where you’re stuck and what all you’ve tried. I will not tell you what to do, but I am happy to offer some guidance.