Question Randomly named hidden files and folders on Desktop ?

[mkaafy]

So, I've just noticed something peculiar in these locations:

• Desktop
• C:\
• the root folder of external hard drives
• ...

some randomly named (seems encrypted) hidden folders exist such as:

cRUQSfOTXj
bnfWscOfOlLSA
wOcRPkwERx
...

And some randomly named files with various extensions (zip, txt, doc, ...) live inside every one of these folders.
It is created again when deleted.

Malwarebytes did not detect anything suspicious.
Please help me to find the virus or trojan or whatever it might be.

 

[rgd1101]

upload a screenshot to imgur.com and post the link here

 

[mkaafy]

upload a screenshot to imgur.com and post the link here

https://imgur.com/gcBneNr

https://imgur.com/MOp7ocz

Thank you in advance.

 

[rgd1101]

did you have show protected os files or show hidden files/folders?
do you have online file sync?

 

[mkaafy]

did you have show protected os files or show hidden files/folders?
do you have online file sync?

Yes.
Just OneDrive.
Now I cannot delete these files/folders.