One of the older and potentially widely misunderstood forms of malware is the Trojan. Simply put, a Trojan is a software application that is designed to provide covert access to a
victim’s system. The malicious code is packaged in such a way that it appears harmless and thus gets around both the scrutiny of the user and the antivirus or other applications that are looking for malware. Once on a system, its goals are similar to those of a virus or worm: to get and maintain control of the system or perform some other task.