What is a dropper?
A dropper is a program that installs a virus or Trojan on a computer system. The program itself is not infected nor is it a virus because it does not replicate. So, technically, a dropper should be considered a Trojan. The virus code is usually contained in a dropper in such a way that it won’t be detected by virus scanners that normally detect that virus (i.e., the dropper program is not infected with the virus).
