Which of the following malware types typically allows an attacker to monitor a user’s computer, is characterized by a drive-by download, and requires no user
interaction?

A.
Virus

B.
Logic bomb

C.
Spyware

D.
Adware

Explanation:
Spyware is software that is used to gather information about a person or organization without their knowledge and sends that information to another entity.
Incorrect Answers:
A: A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. Viruses can also
replicate themselves. All computer viruses are man-made. A simple virus that can make a copy of itself over and over again is relatively easy to produce. Even
such a simple virus is dangerous because it will quickly use all available memory and bring the system to a halt. An even more dangerous type of virus is one

capable of transmitting itself across networks and bypassing security systems. Some people distinguish between general viruses and worms. A worm is a special
type of virus that can replicate itself and use memory, but cannot attach itself to other programs. A virus is not what is described in this question. Therefore, this
answer is incorrect.
B: A logic bomb is a piece of code intentionally inserted into a software system that will set off a malicious function when specified conditions are met. For example,
a programmer may hide a piece of code that starts deleting files should they ever be terminated from the company. A logic bomb is not what is described in this
question. Therefore, this answer is incorrect.
D: Adware is free software that is supported by advertisements. Common adware programs are toolbars that sit on your desktop or work in conjunction with your
Web browser. They include features like advanced searching of the Web or your hard drive and better organization of your bookmarks and shortcuts. Adware can
also be more advanced programs such as games or utilities. They are free to use, but require you to watch advertisements as long as the programs are open.
Since the ads often allow you to click to a Web site, adware typically requires an active Internet connection to run.
Most adware is safe to use, but some can serve as spyware, gathering information about you from your hard drive, the Web sites you visit, or your keystrokes.
Spyware programs can then send the information over the Internet to another computer. So be careful what adware you install on your computer. Make sure it is
from a reputable company and read the privacy agreement that comes with it. Adware is not what is described in this question. Therefore, this answer is incorrect.

http://en.wikipedia.org/wiki/Spyware
http://www.webopedia.com/TERM/V/virus.html
http://techterms.com/definition/adware