Well, not really kill, just bring down. But it makes the title sound nice.
In other news, Microsoft has finally done something right by bringing down Rustock, a botnet that infected millions of computers and caused them to send massive amounts of spam. Rustock was one of the (if not the) biggest spam networks in the world.
Microsoft (and some feds) raided some hosting facilities in the US and took down the servers that instructed infected computers to send spam.
You can read more at cnet.