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VirTool:DOS/Konboot


VirTool:Win32/Konboot is a utility that allows a user to log on and gain access to a computer without requiring authenticated user logon credentials.


What to do now

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.

Threat behavior

VirTool:Win32/Konboot is a utility that allows a user to log on and gain access to a computer without requiring authenticated user logon credentials.
Installation
At the time of this writing, Konboot is available as an archive containing an image file named "cd-konboot-v1.1-2in1.iso". The .ISO image is then used to create a bootable image on either CD-ROM or USB removable drive. Booting a computer using the boot image allows a user to log on to a user account without knowing the logon credentials.
 
After logging on, a user could make changes to the computer such as modifying the logon credentials or other actions.
Additional Information
When booting the computer and starting Windows, VirTool:Win32/Konboot alters the Windows kernel. This can have the effect of destabilizing the applications or the operating system or – in more extreme cases – crashing the operating system resulting in data loss.
 
Analysis by Aaron Hulett

Symptoms

Alert notifications or detections of this malware from installed antivirus or security software may be the only symptom.

Prevention


Alert level: Severe
First detected by definition: 1.55.1923.0
Latest detected by definition: 1.69.152.0 and higher
First detected on: Apr 18, 2009
This entry was first published on: Feb 25, 2010
This entry was updated on: Apr 17, 2011

This threat is also detected as:
  • not-a-virus:PSWTool.Boot.KonBoot.a (Kaspersky)
  • BOOT.GENERIC (Trend Micro)
  • Kon Boot (other)