Joe Stewart, director of malware research at SecureWorks, presented his survey at the RSA Conference, which opened Monday in San Francisco. The survey ranked the top 11 botnets that send spam; by extrapolating their size, Stewart estimated the bots on his list control just over a million machines and are capable of flooding the Internet with more than 100 billion spam messages every day.
The botnet at the top of the chart is Srizbi. According to Stewart, this botnet — which also goes by the names “Cbeplay” and “Exchanger” — has an estimated 315,000 bots and can blast out 60 billion messages a day.
Continue reading… “Botnets Control Over 1 Million Hijacked Computers”