lesson 2

•   Malware – or malicious software, is any program or file that is  harmful to a computer user.
• virus - designed to replicate itself and transfer from one computer to another any computer
• Worm - a malicious program that transfers from one computer to another by any means.
• trojan - disguises as a useful program but once downloaded or installed, leaves your PC unprotected and allow hackers to get your information.
• spyware - runs in the background without your knowledge (thus called “spy”). It can monitor what you are currently doing and typing through keylogging. The key logger software typically uses log file to store its recording.
• phishing - an attempt to trick users into giving out sensitive data such as passwords, credit card numbers, etc.
• Adware - a program designed to send you advertisements, mostly as pop-ups.
• Ransomware - or ransom software is a type of malicious software from cryptovirology that threatens to publish the victim's data or perpetually block access to it unless a ransom is paid.
• • Spam an unwanted email mostly from bots or advertisers. It can be used to send malware.