I'm the only user on my personal laptop (MacBook Pro) running macOS Sierra. I discovered today that a suspicious user with a Chinese name appeared next to mine in the finder. Please see the attached picture below:
I googled for "Linchengzhang" but nothing turned up. What's scary is that's a lot of "auth" files furthest down the file tree. However I have no idea what this really means.
Furthermore, I've not downloaded any programs recently, nor used Xcode in a very long time (Xcode is actually broken for me at the moment).
I only use this laptop for occasional surfing on the web (no shady sites) and couple of programming projects now and then and additionally use Avast.
The only thing I found related to this (very closely) is this thread: link. However, the original poster claims it has to do with some cryptocurrency. I've never mined/bought/traded cryptocurrencies, so I don't think it has to do with that.
Any help would be greatly appreciated, I don't know if my computer (and/or passwords?) are compromised.