What is a Zombie?

A zombie is a computer or device infected with malware that is controlled remotely by a hacker. Zombies may be used to launch online attacks or send spam or phishing emails to infect other devices. A large group of these zombies is known as a botnet.

How to Recognize This Threat: The primary sign of zombie computers is especially slow performance. They can also be turned on remotely by the hacker controlling them, so computers running more than normal may be another signal.

How to Prevent This Threat: Avoid downloading files you’re unsure of, and keep your network protected from online threats with a firewall that’s outfitted with email and web security. Find the firewall that’s right for you.