Tpes of malware and how it can be used to infect an organizational system.

  Amongst various types of malware, name three types of malware and how it can be used to infect an organizational system. Also, describe the method and what measures could be taken to prevent such attack. Describe how buffer overflow and SQL injection can be used by hackers to disable a system. Note: Please, I don’t want definitions as a way of describing the concepts. All I need is practical examples of all the required concepts.