Malicious spyware:
Malicious spyware is used to describe the Trojan application that was created by cyber criminals to on their victims. An example would be key logger software that records a victim’s every keystroke on his or her keyboard.
The recorded information is periodically sent back to the originating cyber criminal over the Internet. Key logging software is widely available and is marketed to parents or businesses that want to monitor their kid’s or employee’s Internet usage.