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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Nuwar.HZ

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:Nuwar.HZ
Technical name:W32/Nuwar.HZ.worm
Threat level:Medium
Type:Hacking Tool
Effects:   It allows to carry out dangerous actions for the victims of attacks.
Affected platforms:

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

First detected on:Oct. 31, 2007
Detection updated on:Oct. 31, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Nuwar.HZ is a rootkit. These are programs used to hide files, Windows Registry entries or processes, either their own or those of other programs.

In this way, even when a user looks for these items on a computer, they won't be able to see them.

Rootkits have been widely used for malicious ends, to camouflage other programs on computers that have previously been compromised through other means.

There are certain examples of malware that use rootkits in order to go unnoticed on the computer they have infected.

 

It affects productivity, preventing tasks from being carried out:

  • In the affected computer: causes system slowdowns.
  • In the local network: it generates a large amount of network activity and consumes bandwidth.

 

Nuwar.HZ 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.
  • Email: sending emails that include a copy of itself as an attachment. The computer is infected when the attachment is run.
  • Peer-to-peer (P2P) file sharing programs: it makes copies of itself with enticing names in shared folders belonging to these programs. Other users of this type of networks then voluntarily download and run the infected files.