Virus Type: Mass mailing worm, written with Visual Basic Script.
Affected OS: Win95/98/Me/2000/XP
Size: about 5 Kb
Packed by: No
When virus start, it creates Gigabyte.vbs file in system directory - C:\Windows\System.
Provides its autorun by creating registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\Gigabyte and
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices\Gigabyte
Besides the basic function - expansion via email by using MS Outlook client, virus contains set of destructive functions:
1. Blocking start of the registry editor RegEdit.
2. Formatting HDD (Win9x only).
3. Deleting such points in Start menu: Programs, Shut Down, Find, Run, Documents, etc.
4. Switching off keyboard and mouse (Win9x only).
5. Function of reassignment of mouse buttons.
6. Deleting special directories Documents and Settings.
7. Restarting computer (Win9x only).
8. Changing of browser start page.
Besides, virus contains functions of minimizing all active windows and displaying password message box.