In computers, a Trojan horse is a program in which malicious or harmful code is contained inside apparently harmless programming or data in such a way that it can get control and do its chosen form of damage
Malware
Malware is software that is specifically designed to disrupt or damage the computer
Malware is short for "malicious software." Malware is any kind of unwanted software that is installed without your adequate consent. Viruses, worms, and Trojan horses are examples of malicious software that are often grouped together and referred to as malware
Trojan
Unlike viruses, Trojan horses do not copy themselves but they can be just as destructive. One of the most insidious types of Trojan horse is a program that claims to rid your computer of viruses but instead introduces viruses onto your computer
Worms
A computer worm is a lone malware computer program that duplicates itself in order to spread to other computers. Often, it uses a computer network to spread itself, relying on security failures on the target computer to access it.
Phishing
sending emails pretending to be from good companies in order to persuade people to reveal personal information, such as passwords and credit card numbers, online.
Spyware
software that enables a user to obtain secret information about someone elses computer activities by transmitting data secretly from their hard drive.
