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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Autorun.JLB

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Autorun.JLB
Technical name:W32/Autorun.JLB
Threat level:Medium
Type:Virus
Effects:   It carries out damaging actions on the affected computer. It uses the infected computer to take malicious actions on other users. It carries out actions that decrease the security level of the 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:Oct. 14, 2009
Detection updated on:Oct. 14, 2009
StatisticsNo

Brief Description 

    

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

 

It affects productivity, preventing tasks from being carried out:

  • In the affected computer: it converts the computer into a platform for taking malicious action surreptitiously: spam sending, launch of Denial of Service attacks, malware distribution, etc.

 

It reduces the security level of the computer: it awaits remote-control orders received through IRC or HTTP.

 

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.

 

Autorun.JLB 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.

 

Autorun.JLB uses the following infection strategies:

  • Direct action: it infects a specific number of executable files every time the virus activates, without going memory resident.