Trojan-Downloader:W32/Small

Classification

Malware

Trojan-Downloader

W32

Trojan-Downloader:W32/Small

Summary

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

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

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User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

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.