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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Autorun.JWU

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Autorun.JWU
Technical name:W32/Autorun.JWU.worm
Threat level:Medium
Type:Worm
Effects:   It spreads and affects other computers. It affects the productivity of the computer, the network to which it’s connected or other remote sites. It changes system permissions. It uses stealth techniques to avoid being detected by the user. It spreads , across the Internet, via mapped drives, by infecting files that are then distributed.
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95/3.X

First detected on:April 16, 2010
Detection updated on:April 16, 2010
StatisticsNo

Brief Description 

    

Autorun.JWU 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: .
  • In the local network: it generates a large amount of network activity and consumes bandwidth.

 

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 terminates processes corresponding to several security tools, such as antivirus programs and firewalls, to prevent detection.
  • It modifies system permissions in order to hide itself.

 

Autorun.JWU 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.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.
  • 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.