A trojan-dropper is a type of trojan that drops different type of standalone malware (trojans, worms, backdoors) to a system.
Like trojans in general, trojan-droppers often rely on tricking the user into believing that the program is authentic, so that they unwittingly install the program themselves. To do this, many trojan-droppers mimic or entirely copy the style and branding of popular legitimate programs or files. Others are installed as part of the payloadd of another harmful program, such as a trojan or a worm .
A trojan-dropper is usually an executable file that contains other files compressed inside its body. When the file is run, it extracts these compressed files and saves them to a folder (usually a temporary one) on the computer. drop and execute other files designed 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: