Threat Description

Trojan-Downloader:​W32/Small

Details

Aliases: Trojan-Downloader:​W32/Small
Category: Malware
Type: Trojan-Downloader
Platform: W32

Summary


This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.



Technical Details


Trojan-Downloader:W32/Small identifies one of more than 370 variants (as of June 28 2004) in this large malware family. The main characteristics of these programs are:

  • They are very compact (a few kilobytes long).
  • They silently download and run executable files on a user's computer.

Many variants are compressed (bya variety of file compressor programs) to reduce their size and hide their contents from the user.

Some Small variants download adware, spyware and searchware (third-party search plugins); others download trojans and backdoors.

Small variants are often silently installed on a user's system via a driveby download when the user visits a malicious website.






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