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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Klez.C

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Klez.C
Technical name:W32/Klez.C
Threat level:Low
Type:Worm
Effects:  It deletes the contents of all the disk drives if it is run on the thirteenth of odd months.

Affected platforms:

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

Detection updated on:Oct. 31, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies
Family:KLEZ

Brief Description 

    

Klez.C is a worm with destructive effects that spreads via e-mail in a message with variable characteristics. Most frequent subjects are How are you? and Can you help me?

Klez.C is very dangerous, as it deletes the content of all the disk drives if the attached file that carries it is run on the thirteenth of odd months (January, March, May, etc.).

Klez.C spreads very fast, as it sends itself out to all the contacts in the Address Book.

Visible Symptoms 

    

Klez.C is difficult to recognize, as it does not show any messages or warnings that indicate it has reached the comptuer.

Klez.C reaches the computer in a message with variable characteristics. However, most common subjects are the following:

How are you?

Can you help me?

We want peace

Where will you go?

Congratulations!!!

Don't cry

For further information on the characteristics of the message, consult the section Means of transmission.