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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Mydoom.O

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Mydoom.O
Technical name:W32/Mydoom.O.worm
Threat level:Low
Type:Worm
Effects:  

It installs a file that opens several TCP ports and acts as a backdoor.

Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Aug. 2, 2004
Detection updated on:Aug. 2, 2004
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Mydoom.O installs a file that behaves as a backdoor by opening the TCP port 1034 and listens to it. By doing so, it allows hackers to remotely access the affected computer in order to carry out actions that would compromise users confidentiality or impede normal work.

Mydoom.O spreads via e-mail in a message with variable characteristics.

 

Panda Security's TruPreventTM Technologies detected and successfully blocked Mydoom.O, without prior knowledge of the malicious code.

Visible Symptoms 

    

Mydoom.O is very difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.