A Trojan or Trojan horse is a variety of malware that disguises itself as something you want in order to trick you into letting it through your defenses. Like the Trojan War, the Greeks hid inside a giant wooden horse which they left outside the gates of Troy. Like Odysseus, cyber-attackers hope that you’ll be fooled by a tempting piece of bait to let malicious code inside your network. Trojans are deployed by attackers to damage or take control of your computer.”]
Source: https://www.csoonline.com/article/3403381/what-is-a-trojan-horse-how-this-tricky-malware-works.html