Trojan viruses, also known as Trojan horses, are a type of malware that disguises itself as legitimate software to trick users into installing it on their computers. Once installed, Trojans can give attackers remote access to the infected computer, allowing them to steal data, install other malware, or launch denial-of-service attacks.
Trojans are one of the most common types of malware, and they can be very difficult to detect. This is because they often use social engineering techniques to trick users into installing them. For example, a Trojan may be disguised as a popular software update, a game, or even a harmless-looking email attachment.