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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Mytob.S

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

It connects to a server and accepts remote control commands that are run in the affected computed. It prevents the user from accessing certain web pages belonging to antivirus companies. It spreads via e-mail, across the Internet and across networks.

Affected platforms:

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

First detected on:April 5, 2005
Detection updated on:April 5, 2005
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Mytob.S is a worm with backdoor characteristics. It connects to a server and accepts remote control commands that are run in the affected computed.

In addition to this, Mytob.S prevents the user from accessing certain web pages belonging to antivirus companies.

Mytob.S uses different means to spread:

  • It spreads via e-mail, in a message with variable characteristics.
  • It exploits the LSASS vulnerability to spread across the Internet.
  • It attempts to access network shared resources using passwords that are typical or easy to guess.

If you have a Windows XP/2000 computer, it is highly recommendable to download the security patch for the LSASS vulnerability from the Microsoft website.

Visible Symptoms 

    

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