The takedown of 100 servers used to control Zeus-related botnets may be a short-lived victory, security researchers said after discovering that about a third of the orphaned channels were able to regain connectivity in less than 48 hours. The resurrection of at least 30 command and control channels came after their ISP found a new upstream provider to provide connectivity to the outside world, autonomous system records show. Researchers at Recorded Future report a rise in cracked Cobalt Strike and other open-source adversarial tools with easy-to-use interfaces.
Source: https://threatpost.com/botnets-find-new-internet-homes-quickly-031210/73679/