Baddest botnets of 2012

According to security firm Kindsight, these are the Top Ten Worst Botnets this year.

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Grum was responsible for sending 18 billion spam messages per day and 18% of the world’s spam. It used victim computers to distribute pharmaceutical spam email. The shutdown of Grum in July 2012 was considered a huge win for the security community. But even after its shutdown, spam levels quickly resurged to the same level, likely due to other spamming botnets.

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