said by kpatz :

If the algorithm for the domains has been cracked, an enterprising security firm could register up the next few batches of domains, use them to take control of the botnet, and distribute an "update" that removes (or at least shuts down) the malware from the victim's systems.

said by fireflier :

"For weeks, the researchers were able to thwart the emergency backup measure by generating the domain names such as qpqduqud.com themselves and then snapping up the addresses ahead of the bad guys. The cat-and-mouse standoff ended this week after FireEye researchers decided they could no longer afford to spend the money buying the domains."