Ransomware com.apple.axsvcpd

I launched Chrome yesterday, downloaded from the official site a long time ago, and as I did, it downloaded without asking my permission some file, that I couldn't place and soon forgot about it. The nane of the file is "com.apple.axsvcpd" and it is a ransomware, it created a .txt file in my home and other big folders, that described the situation: you mihgt be looking for your photos or files and come up with nothing because they're missing? Don't bother because we've encrypted your files with [I don't remember what] and now you have 72 hours to pay us only once, email provided. No payment within 72 hours — my files are gonna be deleted.

Before that, something was eating halp of my RAM and CPU, I managed to find this file in the Library/osxmobiledata/com.apple.axsvcpd . Deleting, stopping the process in the Activity Monitor, moving, any manipulations with this file were abviousely futile. BUT: none of my files are missing for now. And the text file started with: "As soon as you get this message" — don't really know what they're talking about, there was no message, I only quick looked it because it wasn't there before. Right after Chrome sent me this surprise, I started receiving questions: allow the process track all your buttons pushed on your keyboard? and stupid crap like that. At first, I might have given it a green light for the external drive access, one partition of which is TimeMachine - also the process prevents rolling back in time. How do I know what permissions this file has? Is it curable? Somebody had a similar experience with ransom ware before?

Thanks,

Anna