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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Sobig

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Sobig
Technical name:W32/Sobig
Threat level:Low
Alias:W32/Sobig@MM Sobig W32/Sobig@MM W32.Sobig.A@mm,
Type:Worm
Effects:  

It spreads to other computers via e-mail and trough shared network drives. It downloads a Trojan to the affected computer from the Internet.

Affected platforms:

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

First detected on:Jan. 10, 2003
Detection updated on:Oct. 25, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies
Repair utility:Panda QuickRemover

Brief Description 

    

Sobig is a worm that spreads rapidly via e-mail in a message with the text Attached file:, whose sender address is big@boss.com.

This worm also spreads through shared network drives, provided that the operating system is in English.

When Sobig affects a computer, it sends a message to an specific address and connects to a webpage in order to download a Trojan.

Visible Symptoms 

    

Sobig is very easy to recognize, as it reaches the computer in an e-mail message with the following characteristics:

  • Sender:
    big@boss.comand
  • Message:
    Attached file:.