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botnets


Ask the Expert: Can a Botnet Really Turn My Computer Into a Zombie?

Q: “I recently read about something called bots and botnets, and that these things can turn my computer into a zombie. What does that mean? Can you explain what botnets are and what they do?”

A: Botnets are a new and scary online phenomenon. In layman’s terms, a botnet is a network of infected computers that are controlled virtually by a botmaster.

With the rapid growth in bot infections, it’s vitally important that everyone get up to speed about this threat.

Night of the Living BotNets

Botmasters can take over computers in a variety of ways, but usually they do it by sending infected emails to unsuspecting users. When the user opens a file attached to the email, their machine becomes infected.

After a computer becomes infected, the botmaster adds it to his or her botnet, which is the network of infected computers. Infected computers are sometimes called “zombie” computers.

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Online Security: Global Spam Email Levels Fall

BBC News reports on a a “precipitous decline” in spam messages, noting that one security firm detected around 200 billion spam messages being sent each day in August 2010, but just 50 billion by December. The majority of spam is sent by networks of infected computers known as botnets; the article points out that one botnet, called Rustock, was once responsible for almost 48% of spam, but by December it accounted for just 0.5% of global spam.

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