Eleven Analyzes Impact Of Botnet Takedowns On Spam VolumesFew botnet takedowns had a noticeable impact on spam volumes
Berlin, August 1, 2012 - Two weeks after the takedown of Grum, the world's third largest botnet, the Research Team of eleven, leading German e-mail security provider, presents an interactive timeline at www.eleven.de/botnet-timeline-en.html that investigates the connection between botnet shutdowns and spam volume trends. To this purpose, eleven analyzed the most important botnet takedowns since 2008.
The result: the majority of botnet shutdowns had little or no noticeable and at most only a short-term impact on spam volumes; those volumes even increased after the takedown of the Mariposa botnet in December 2009. If the effect is greater than in 2008 when the Internet connections of the spam friendly web hosting company McColo were cut, it generally takes only a few weeks until previous spam levels are again achieved.
The only exception was the world's largest botnet, Rustock, whose control servers were taken out in March 2011. Some of the impact on spam levels could be felt even one year later, both in terms of spam volumes as well as the geographic and topic-related distribution of spamming. According to the eleven Research Team, the lacking influence of the majority of botnet takedowns shows that most botnet operators are able to restore their infrastructures very quickly and the latest generation of botnets is designed to be so robust that takedowns often fail to annihilate overall control infrastructures.
The goal of the botnet timeline is to make the links between anti-botnet measures and spam volume trends more transparent and to create greater clarity regarding myths and speculation about the impact of botnet takedowns on spam trends. The timeline is now online and findings about further botnet takedowns and their consequences will be integrated on an ongoing basis.
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