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Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Klez

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Klez
Technical name:W32/klez
Threat level:Low
Type:Virus
Effects:   It carries out damaging actions on the affected computer. It does not spread automatically using its own means.
Affected platforms:

MS-DOS

Detection updated on:Sept. 19, 2007
StatisticsNo

Brief Description 

    

W32\Klez is a worm designed to spread via e-mail in a message whose characteristics may vary. Once the infected attachment is run, it will copy itself to the Windows System and Windows/Temp folders. Additionally, W32\Klez will create an entry in the Windows Registry in order to ensure its execution every time the infected system is started up.

 

Finally, W32\Klez incorporates a polymorphic virus called W32/Elkern, which looks for and eliminates every executable file found in the infected computer. However, this virus will only work correctly under Windows 98. 

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