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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Nimda.R

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Nimda.R
Technical name:W32/Nimda.R
Threat level:Low
Type:Worm
Effects:   It spreads and affects other computers. It causes the slowdown of the system, preventing planned tasks from being carried out. It changes system permissions. It spreads , across the Internet, via email, by infecting files that are then distributed.
Affected platforms:

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

First detected on:Feb. 23, 2010
Detection updated on:Feb. 23, 2010
StatisticsNo

Brief Description 

    

Nimda.R is a worm that spreads by copying itself, without infecting other files.

 

It affects productivity, preventing tasks from being carried out:

  • In the affected computer: causes system slowdowns.

 

It reduces the security level of the computer: it changes system permissions, decreasing the security level.

 

Nimda.R uses the following propagation or distribution methods:

  • Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
  • Via Internet, exploiting remote vulnerabilities: attacking random IP addresses, in which it tries to insert a copy of itself by exploiting one or more vulnerabilities.
  • Email: sending emails that include a copy of itself as an attachment. The computer is infected when the attachment is run.
  • File infection: it infects different types of files, which are then distributed through any of the usual means: floppy disks, email messages with attachments, Internet download, files transferred via FTP, IRC channels, P2P file sharing networks, etc.