I received a pendrive, one noticed that the volume of the device was almost all used, when I checked and only 4 photos and a presentation, all other documents and files were moved into folder called RECYCLER.BIN and all the hidden files were there.
Mschield was scanned drive and did not find anything, avast did not detect when accessing, only during scanning
the file wyvdysgfjxhxmgnvqhsmlxje.qse detected as Win32:MalOb-LU [Crypt]
Found inside the $ ROQKA3B folder located inside the RECYCLER.BIN an undetected shortcut LNK
I gave the pen drive, I could not stay to finish.