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Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Autorun.IRB

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Autorun.IRB
Technical name:Trj/Autorun.IRB
Threat level:Medium
Type:Trojan
Effects:   It allows to get into the affected computer. It uses stealth techniques to avoid being detected by the user. It spreads , via mapped drives, through shared network resources, by infecting files that are then distributed.
Affected platforms:

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

First detected on:March 4, 2009
Detection updated on:March 4, 2009
StatisticsNo

Brief Description 

    

Autorun.IRB is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions.

 

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

  • 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.IRB 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.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.
  • Computer networks (shared resources): it creates copies of itself in shared network resources to which it has access.
  • 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.

 

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