It is a dangerous memory resident boot virus. It hooks INT 13h and writes itself to the MBR of the hard drive and boot sector of floppy disks. The virus has a bug and does infect correctly only 360K floppy disks. While infecting other floppy disks the virus may corrupt data on them. While infecting the MBR the virus overwrites it and does not save the original sector. To load system while loading from infected MBR the virus scans Partition Table and passes control to active boot sector.