White Papers for Federal Information Security Management Act (FISMA)

Stopping Zombies, Botnets and Other Email and Web-borne Threats

Sophos

A zombie is a computer that has been silently infected with malware, giving unauthorized or remote users the ability to control it. Once a computer has been turned into a zombie, hackers use it to commit a wide range of crimes by linking with a network of thousands of other infected computers. Networks of zombie computers are used by hackers to send spam, plant spyware and adware, and phish for confidential information from within unwitting organizations. Sophos estimates that up to 90% of all spam originates from hijacked computers.
Zombies have been found in organizations of all kinds, from financial planning companies to universities and nursing homes. They cause business disruption, network damage, information theft and harm to an organization’s reputation.

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