BBC – When cyber criminals are arrested it usually means the end of their profiting from spam, viruses and stolen data. Once down, they stay down.
But some parts of the cyber crime world are much harder to stamp out. Like zombies they do not seem to know they are supposed to be dead, and keep coming back again and again to cause even more trouble.
In particular, botnets – networks of hijacked computers – exhibit this zombie-like ability to lurch back into life, despite a significant number of victories against these crime networks over the past year.