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This type of trojan contains one or more malicious programs, which it will secretly install and execute.

Disinfection & Removal

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see .

Technical Details

When searching our Virus Descriptions database for a specific program (e.g., Trojan-Dropper:W32/Example.A), you may be directed to this page if the overview below sufficiently describes the program.

Alternatively, you may be directed to this page if no description matching that specific query is currently available. You can submit a sample of the suspect file to our Response Lab for further analysis via:

About Trojan-Droppers

A Trojan-Dropper is a type of trojan that drops different type of standalone malware (trojans, worms, backdoors) to a system. It is usually an executable file that contains a other files compressed inside its body. When a Trojan-Dropper is run, it extracts these compressed files and saves them to a folder (usually a temporary one) on the computer.

In many cases, Trojan-Droppers also drop and executes to display games, images or messages, which serve as decoys to avert attention from malicious activities. For representative examples of Trojan-Droppers, see the following descriptions:


Some Trojan-Droppers extract components directly to memory and activate them there. In this case anti-virus software is not able to detect dropped malware, so detection of the whole trojan dropper package is added.


For more information, see Terminology: Trojan-Dropper.

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