Sophos

Troj/Dloader-NZ

Aliases
  • Trojan-Downloader.Win32.Small.akr
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 26 May 2005 21:19:13 (GMT)
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Action

More Information

Troj/Dloader-NZ is a downloading Trojan for the Windows platform.

Troj/Dloader-NZ creates the following registry entry to run itself automatically on log-on:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
CacheLoader
<path of filename>

Troj/Dloader-NZ attempts to download an executable from a preconfigured URL to a randomly named file with ".tmp" extension. It creates "Cache" subfolder of the Windows folder. If this download is interrupted Troj/Dloader-NZ will resume at the next logon.

Once the file has finished being downloaded, it is moved to the file "Security iGuard.exe" in the Program Files folder and executed.

Troj/Dloader-NZ creates the following registry entries for its own use:

HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer
CachedFileName

HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer
CachedActualFileSize

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