Z

A zombie computer, or zombie, is a computer that has been backdoored for use in denial-of-service attacks, spamming, or other unethical or illegal Internet activity; that is, its security has been compromised and it has become available for use by an outside person. This backdooring is usually accomplished with the use of a worm or Trojan. The person who has backdoored the zombie may seek to add it to a larger group (a zombie army or botnet) for use in denial and degradation of service attacks, spamming, and other online mischief.