Explain how it affects a computer system or the user/user account system. (How does it “get in”?

You will select one of the following security issues/malware from the list below. Define each in your own words (3-4 sentences, minimum). Explain how it affects a computer system or the user/user account system. (How does it “get in”? What does it specifically do to the system–What is the payload? What are some of the “symptoms”? How is it transferred to another system?); give 2 examples/names. List your resources (URLs)paste them at the bottom of your post.

Wikipedia is not a valid reference/resource.