Kaspersky Lab and Microsoft just managed to neutralize a major botnet, known as "Kelihos" or "Hlux," depending on which company you ask. At its peak, the botnext had infected over 49,000 IPs across the world, with an elaborate peer-to-peer architecture dispatching "jobs" to the "worker" machines, which generated all sorts of illicit activity like spam, DOS attacks, stock scams, and identity theft. Tillmann Werner from Kaspersky lab wrote up an enlightening behind-the-scenes story on exactly how they managed to take down the botnet. Interestingly (spoiler alert), the Microsoft and Kaspersky were able to gain control of the botnet, redirecting all of the slave computers to a "sinkhole" address operated by the good guys, but they haven't issued a self-destruct update to the software, due to the invasive and illegal nature of that sort of thing. So, somewhere, maybe even on a computer near you, a botnet lies dying, but not yet dead.