This is a dangerous memory resident boot infector. It infects the boot sectors of the floppy disks and the hard drive MBR.
The virus infects the hard drive while loading from an infected floppy disk. Then it hooks INT 13h, and infects the floppy disks that are accessed - these floppies are infected by the "Brain" method. On February 11th the virus displays a message and erase the disk sectors:
Ausländer raus aus der Schweiz !
