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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Downloader.CYZ

Threat LevelHigh threatDamageSevereDistributionNot widespread
Common name:Downloader.CYZ
Technical name:Trj/Downloader.CYZ
Threat level:Medium
Type:Trojan
Effects:  

It downloads the Trojans Banker.VY and Dumarin.L to the affected computer. It reaches the computer when the user accesses certain web pages, which attempt to exploit the Internet Explorer vulnerabilities called Vulnerability in Cursor and Icon Format Handling, MhtRedir and Object Type vulnerability.

Affected platforms:

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

First detected on:June 1, 2005
Detection updated on:Jan. 21, 2006
StatisticsNo
Proactive protection:
Yes, using TruPrevent Technologies

Brief Description 

    

Downloader.CYZ is a Trojan that downloads the Trojans Banker.VY and Dumarin.L to the affected computer.

Additionally, it grants itself the privilege of debugging other programs, which allows it to end processes, create remote threads, etc. It also monitors the presence of windows with certain titles in order to close them and prevent the user from viewing them.

Downloader.CYZ does not spread by its own means. It reaches the computer when the user access certain malicious web pages that exploit the Internet Explorer vulnerabilities called Vulnerability in Cursor and Icon Format Handling, MhtRedir and Object Type, in order to automatically download and run Downloader.CYZ.

In order to avoid being affected by Downloader.CYZ, download and install the security patch for the Vulnerability in Cursor and Icon Format Handling, as well as the latest cumulative updates for Internet Explorer y Outlook Express from the Microsoft website.

 

Visible Symptoms 

    

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