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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Lewor.AJ

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Lewor.AJ
Technical name:W32/Lewor.AJ.worm
Threat level:Medium
Type:Worm
Effects:   It spreads and affects other computers. It terminates processes belonging to security tools, leaving the computer vulnerable to other malware attacks. 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:July 27, 2006
Detection updated on:July 27, 2006
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Lewor.AJ is a worm that spreads by copying itself, without infecting other files.

 

It reduces the security level of the computer: it terminates processes belonging to security tools, such as antivirus programs and firewalls, leaving the computer defenseless against attacks from other malware.

 

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.

 

Lewor.AJ 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.