Researchers at RSA have identified the network framework that endows some of the worlds most notorious botnets with always-on connections that are virtually immune from takedowns.
At the network's heart are the servers that shepherd tens of thousands of infected PCs so they continue to send spam, spread malware, and stay updated with the latest bot software. By maintaining multiple conduits between these master control channels and the outside world, malware gangs are able to create highly redundant networks that are extremely difficult for authorities and whitehats to shut down.
"What they've worked really hard to do for themselves is build a spiderweb of connections to the outer ring if the outer ring were the internet at large," Sean Brady, manager of RSA's identity protection and verification group, told The Register
. "As you start picking off threads, they work to reroute, to crawl along different threads."