ALIASES:

Grub

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Others

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This memory resident Boot virus copies itself to memory (high memory) once it is executed, or when a system is booted using an infected disk.

  TECHNICAL DETAILS

NOTES:

This Boot virus hooks Interrupt 13H, which is used by DOS for drive access routines. Services 2 and 3, used for Reading and Writing disk sectors, respectively. Thus the virus infects the boot sector of a disk that is being accessed, if the disk is a bootable disk. Once the boot sector is infected all disks that are accessed from the boot will also be infected.