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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Downloader.HC

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Downloader.HC
Technical name:Trj/Downloader.HC
Threat level:Low
Alias:TrojanDownloader.Win32.Swizzor.an
Type:Trojan
Effects:  

It downloads an adware program to the affected computer, modifies the Internet Explorer home page and adds several links to the Favorites folder.

Affected platforms:

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

Detection updated on:June 16, 2004
StatisticsNo
Country of origin:UNITED STATES OF AMERICA

Brief Description 

    

Downloader.HC is a Trojan that downloads the adware detected by Panda Security as Lop on the affected computer. This adware adds a tool bar to Internet Explorer.

In addition, Downloader.HC modifies the browser Internet Explorer home page and adds several links to the Favorites folder.

Occasionally, when the user closes the browser window, Downloader.HC displays advertisements.

Downloader.HC does not spread automatically using its own means. It needs the attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, e-mail messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.

Visible Symptoms 

    

Downloader.HC is very easy to recognize as:

  • It changes the Internet Explorer home page for:

  • It adds a tool bar to the Internet Explorer:

  • It displays the window below when the Internet Explorer search option is used:

  • It adds several links to the Favorites folder.
  • Occasionally, it shows advertising messages when the Internet Explorer is closed.