Viruses: A virus is a malicious software attached to a document or a file That executes its code and spread from Host to Host. Their code is designed in such a way that once opened, it will disrupt the system’s ability to work, hence creating an operational issue or Data loss.
Worms: Computer Worm malware usually spreads copies of itself from computer to computer, often via email contacts of the victims.
Trojan viruses: Malware software is often disguised as a legitimate tool designed to gain access to user data.
Spyware: Spyware is disguised software that gathers information about a person or an organisation.
Adware: It is spyware disguised as an advertisement which when clicked or opened injects viruses or trojans into the system which can attack a computer system or sometimes redirects you to some other unsafe sites.
Ransomware: Ransomware is malicious software that gains access to sensitive information within a system, encrypts that information so that the user cannot access the system and then usually demands a financial pay out for the data to be released.