This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
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:
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.