Something is creating batch files

Question

My OS is Windows 10. Since a couple of days I notice that many many folders have a batch file in it, that if clocked is set to copy files. The code of the file is as follows:

@echo off

for /r "d:" /d %%a in (*) do copy %0 "%%~fa%%~nxa.bat"

I for certain have not created this. How or what did it, is my question, and how to get rid of it. Are these files harmful?

Thanks and regards,

Danker

[Moved from: Windows / Windows 10 / Security & privacy]

Answer 1

Have you run Windows Defender and Malwarebytes?

Yes, that plus avast. Nothing was found except the usual cookie mess

Answer 2

Have you run Windows Defender and Malwarebytes?