Adware is unwanted software designed to display advertisements on your screen, often in a web browser, but sometimes also in mobile applications. Typically, adware will disguise itself as a legitimate one or overlay another program to trick you into installing it on your PC, tablet, or mobile device.

Spyware is malicious software that covertly observes computer user’s activities, including browsing activity, downloads, payment information, and login information, and then reports this information to the perpetrator. software. Spyware isn’t just for cybercriminals. Legitimate companies sometimes use spyware to track employees.

A keylogger, a less sophisticated cousin of spyware, is malware that records all of the user’s keystrokes on the keyboard. This malware usually stores the collected information and sends it to the attacker looking for sensitive information such as usernames, passwords or credit card details.

Computer virus:
A computer virus is malicious software that attaches itself to another program and, when triggered, replicates itself by modifying other computer programs and infecting them with its own pieces of code.

Worms are a type of malware similar to viruses in that they spread, but they do not require user interaction to be triggered.

A Trojan horse, or Trojan horse, is more a method of transmitting infections than an infection. The Trojan is presented as something useful to trick users into opening it. Trojan horse attacks can carry just about any form of malware, including viruses, spyware, and ransomware. The famous Emotet banking Trojan started out as an information thief, targeting banks and large corporations.