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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Nurech.Z

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Nurech.Z
Technical name:W32/Nurech.Z.worm
Threat level:Low
Type:Worm
Effects:  

It ends processes belonging to several security tools and has rootkit functionalities in order to make its detection more difficult. It spreads via email in a message with an attached file and an image that includes a text.

Affected platforms:

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

First detected on:April 13, 2007
Detection updated on:Nov. 21, 2007
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Nurech.Z is a worm that ends several processes belonging to security tools, such as antivirus programs and firewalls, among others.

Additionally, it has rootkit functionalities, which allow it to make its detection more difficult.

Nurech.Z spreads via email in a message with an attached file that is compressed with a password.

Visible Symptoms 

    

Nurech.Z is easy to recognize, as it reaches the computer in an email message with the following characteristics:

  • Subject: it is variable and can be one of the following:
    ATTN!
    Spyware Alert!
    Spyware Detected!
    Trojan Alert!
    Trojan Detected!
    Virus Activity Detected!
    Virus Alert!
    Virus Detected!ected!
    Warning!
    Worm Activity Detected!
    Worm Detected!
  • Message: it contains an image like the following with a text and a password in order to decompress the attached file:

  • Attachments: it is compressed with a password that is given in the message and can be one of the following:
    BUGFIX-%5 random characters%.ZIP
    HOTFIX-%5 random characters%.ZIP
    PATCH-
    %4 random characters%.ZIP
    REMOVAL-%5 random characters%.ZIP