Welcome to the Virus Encyclopedia of Panda Security.
|Alias:||Klez.K,, Klez.gen@MM, W32/Klez.K-mm, WORM_KLEZ, Klez.G, W32/Klez.G-mm|
|Effects: ||It overwrites executable files and modifies some system controllers, preventing the affected computer from starting up correctly.|
|Detection updated on:||Oct. 31, 2007|
Klez.H is a worm that reaches computers in an e-mail message, which is difficult to recognize as its subject varies. The most common subjects however, are How are you? or let’s be friends.
It is very easy to become infected by this worm, as it is automatically activated when the message is viewed through Outlook’s Preview Pane. It also carries out its infection when the file attached to the message is run.
The effects of Klez.H are the following:
- It automatically and rapidly spreads to all the contacts in Outlook’s Address Book.
- It overwrites executable files, rendering them unusable.
- It deactivates processes that are running.
- It attempts to delete files corresponding to antivirus programs.
Klez.H is difficult to recognize as it reaches computers hidden in an e-mail message with variable characteristics. The most common subjects are:
How are you?
let’s be friends
So cool a flash,enjoy it
For more information consult the section Means of transmission.