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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Killfiles.AD

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Killfiles.AD
Technical name:Trj/Killfiles.AD
Threat level:Medium
Type:Trojan
Effects:  

It prevents computers from starting up, as it deletes key files for their correct functioning. It is commonly used by other Trojans to delete data from affected computers.

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Affected platforms:

Windows XP/2000/NT/ME/98/95

First detected on:July 27, 2005
Detection updated on:July 27, 2005
StatisticsNo

Brief Description 

    

Killfiles.AD is a Trojan that consists in a batch script that deletes key files for the correct functioning of the operating system. Those files are located in the Windows directory and several of its subfolders, as well as in the root directory of the C: drive.

As a result, the computer will not be able to start up.

Killfiles.AD is commonly used by other Trojans in order to delete data from affected computers, and it does not spread automatically using its own means.

Bear in mind that the method employed by Killfiles.AD to carry out its actions is not very sound and may fail. Additionally, on Windows 2003/XP/2000/NT computers, it would need administrator rights in order to delete those files.

Visible Symptoms 

    

Killfiles.AD is easy to recognize once it has affected the computer, as it prevents the computer from starting up by deleting key files for the correct functioning of the operating system.

Depending on their Windows version, affected computers will probably display the message NTLDR missing.