Jump in Botnet Problem
What is up with the 4x jump in bots? Check out the graphs at Shadowserver. It has been pointed out that there is no obvious explanation in terms of new malware but like others I suspect it is a combination of other delivery mechanisms and better control of bots.
It's a lot like marketing. Once a market matures, in this case the pool of prospective bots, the cost of the bot herder to acquire new zombies becomes greater than the cost of doing more to retain existing bots. That is probably going on here to some degree. More effort is going into keeping bots and C&C servers in place.
In terms of new distribution, could this be a product of all those content management system SQL injection attacks we've seen over the past several months? ISC is working on honeypot projects to learn more.
Not a lot of data to work on to determine the cause but the raw number in terms of size is clear enough.
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