Avast! Picks it up for me as EICAR Test-NOT Virus!

Try saving the file as .bat lars.

Example:

:s
start %0
goto :s

If you save that in Notepad as *.bat the detection should be BV:Starter-X [Trj]

Don’t launch that file. As it will crash your computer. (Loads Infinite CMD’s until Retstart/Crash/Hard Reboot)