Which type of malware builds a network of contaminated computers?

A.
Logic Bomb

B.
Storm Worm or Botnet

C.
Trojan

D.
Virus

Explanation:
Storm Worm is patient, and therefore difficult to detect and analyze. It works like a colony of ants, whereby there is no central command and control server, but instead a network connection between thousands of infected PCs is set up. As a result, the infected machines do not affect the botnet. Whats more, Storm Worm does not cause any damage or load to the host, so that the hosts do not know that they are infected.