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Dropper

Classification

Category:

Malware

Type:

Trojan

Aliases:

  • Dropper

Summary

A program that saves and installs another file (usually a harmful program) onto a computer or device.

Removal

Technical Details

A dropper acts as a carrier or delivery vehicle for the file that is to be dropped, which is referred to as the dropper's payload. The payload is usually stored in the dropper's body as a compressed file.

Droppers are almost always used to deliver harmful programs. It was once common to see droppers delivering viruses, but it is now more usual to see them drop trojans.

Dropping the payload

When the dropper is run, it extracts the compressed file from its body and drops it, or saves it onto the computer or device. The dropper may also run the dropped file to install it onto the computer or device.

A dropper can drop more than one file as its payload. Many droppers will also drop images or videos, which are used as decoys and displayed to the user to distract them from any overt actions that the other dropped files may perform.

From droppers to Trojan-Droppers

Today, droppers are detected by F-Secure products as Trojan-Droppers.

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