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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Blackout

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Blackout
Technical name:W97M/Blackout
Threat level:Low
Alias:W97M.Blackout.Worm,
Type:Worm
Effects:  It disables the Shut down option in the Windows Start button menu. It sometimes displays a message on screen. It infects Word documents.

Affected platforms:

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

Detection updated on:May 14, 2009
StatisticsNo

Brief Description 

    

Blackout is a worm that mainly uses the chat channel IRC to spread.

Blackout carries out the following actions:

  • It disables the Shut down option in the Windows Start button menu.
  • It infects Word documents when they are opened.
  • It sometimes displays a message on screen.

Visible Symptoms 

    

It is easy to know if Blackout has infected a computer, as it disables the Shut down option in the Windows Start button menu.

Furthermore, every time a file is run on the infected computer, Blackout compares the time on the system clock with a number select at random between 1 and 24. If the hour and this number coincide, it displays the following message on screen: