What you need to know about Trojan Horse?
A Trojan horse is an application that appears to have a benign purpose, but actually performs malicious activity. This deception is what makes these applications a dangerous threat to your system. The Internet is full of useful utilities (including many security tools), screen savers, images, and documents. Most Internet users tend to download these things. Creating an attractive download that has a malicious payload is an effective way of gaining access to a person’s computer.