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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Naco.B

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Naco.B
Technical name:W32/Naco.B
Threat level:Low
Type:Worm
Subtype: Trojan
Effects:  It causes security programs to stop working. It also sends out information on the affected computer.
Affected platforms:

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

Detection updated on:May 27, 2003
StatisticsNo

Brief Description 

    

Naco.B is a dangerous worm, as it includes a Trojan component that allows an attacker to gain remote access to certain resources on the affected computer. A hacker could carry out the following actions, among others, open and close the CD-ROM tray, switch the mouse button functions, etc.

Naco.B also sends an e-mail message containing information on the affected computer to the following address: chatza@phreaker.net.  The information it sends includes the operating system installed, the version of Internet Explorer installed, the machine name, number and type of drives installed, etc.

Finally, Naco.B disables the security programs installed on the affected computer. In order to do this, it carries out the following actions:

  • It ends active processes belonging to antivirus and firewall programs, among others, in the affected computer.
  • It looks for files related to different antivirus and security programs and deletes them.

Naco.B spreads rapidly via e-mail, P2P (peer-to-peer) file sharing programs and ICQ chat channels. When it spreads via e-mail, the message always contains an attached file called WARS.EXE.

Visible Symptoms 

    

When Naco.B spreads via e-mail it is easy to recognize, as it reaches computers in an e-mail message with an attached file called WARS.EXE.

Similarly, the body of the message is always the same:

Hello dear,
I’m gonna missed you babe, hope we can see again!
In Love,
Rekcahlem ~<>~ Anacon