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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Downloader.ENC

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Downloader.ENC
Technical name:Trj/Downloader.ENC
Threat level:Low
Type:Trojan
Effects:  

It downloads a variant of the worm Dedler. It reaches the computer when the user accesses certain malicious web pages, which exploit the Internet Explorer vulnerability called Vulnerability in HTML Help.

Affected platforms:

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

First detected on:Sept. 2, 2005
Detection updated on:Sept. 2, 2005
StatisticsNo

Brief Description 

    

Downloader.ENC is a Trojan that downloads a variant of the worm Dedler to the affected computer.

Downloader.ENC does not spread by its own means. It reaches the computer when the user access certain malicious web pages that exploit the Internet Explorer vulnerability called Vulnerability in HTML Help, in order to automatically download and run Downloader.ENC.

It has been reported that some of such web pages deal with the catastrophe caused by hurricane Katrina, occurred in New Orleans in late August 2005, in order to draw the user's attention to such pages and to pass themselves off as legitimate websites.

 

In order to avoid being affected by Downloader.ENC, download and install the security patch for the Vulnerability in HTML Help from the Microsoft website.

Visible Symptoms 

    

Downloader.ENC is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.