A Trojan virus is a type of malware that disguises itself as legitimate code or software. It is designed to damage, disrupt, steal, or in general inflict some other harmful action on your data or network. Unlike computer viruses and worms, Trojans generally do not attempt to inject themselves into other files or otherwise propagate themselves). Instead, they are generally spread by some form of social engineering, such as where a user is duped into executing an email attachment disguised to appear innocuous or by clicking on a fake advertisement on social media or anywhere else). Once a Trojan is inside your system, it can perform destructive actions before you even know it’s there. Some Trojans sit idly on your computer and wait for further instructions from its host hacker, but others begin their malicious activity right from the start. Trojans can act like bona fide applications or files to trick you into loading and executing the malware on your device. Once installed, a Trojan can perform the action it was designed for, such as gain backdoor access to corporate systems, spy on users’ online activity, or steal sensitive data.