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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Nugache.K

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Nugache.K
Technical name:W32/Nugache.K.worm
Threat level:Medium
Type:Worm
Effects:   It spreads and affects other computers. It carries out denial of service attacks against mail servers in the local network. It carries out actions that decrease the security level of the computer. It spreads , via email, via IRC, via mapped drives, through instant messaging.
Affected platforms:

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

First detected on:June 29, 2007
Detection updated on:July 3, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Nugache.K is a worm that spreads by copying itself, without infecting other files.

 

  • In the local network: it carries out denial of service attacks against mail servers on the local network.

 

It reduces the security level of the computer: it notifies the attacker that the computer has been compromised and is ready to be used maliciously; it awaits remote-control orders received through IRC, HTTP, or FTP.

 

Nugache.K 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.
  • IRC: It sends a copy of itself to all users connected to the channel to which the infected user is connected.
  • Instant messaging: it sends links pointing to a copy of itself to all users included in the infected user's contacts list.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.