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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

AutoRun.XA

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:AutoRun.XA
Technical name:W32/AutoRun.XA.worm
Threat level:Medium
Type:Virus
Effects:   It carries out damaging actions on the affected computer. It sends the information it has captured to a remote user. It changes system permissions. It uses stealth techniques to avoid being detected by the user. It does not spread automatically using its own means.
Affected platforms:

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

First detected on:May 30, 2008
Detection updated on:Aug. 26, 2009
StatisticsNo

Brief Description 

    

AutoRun.XA is a virus that spreads to other computers by copying its code to other files or programs.

 

It captures certain information entered or saved by the user, with the corresponding threat to privacy: .

It sends the gathered information to a remote user by any available means: email, FTP, etc.

 

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

 

It uses stealth techniques to avoid being detected by the user:

  • It uses techniques included in its code to hide itself while it is active.
  • It deletes the original file from which it was run once it is installed on the computer.
  • It modifies system permissions in order to hide itself.

 

AutoRun.XA does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

 

AutoRun.XA uses the following infection strategies:

  • Resident: once it has been run, the virus goes memory resident and stops functions belonging to the operating system. Therefore, every time the operating system or an application tries to access any of these functions, the virus will activate and infect new files.