Grum's servers — the machines that control the network and manipulate users' PCs without their knowledge — were based in the Netherlands and Panama, making them difficult to locate. Once they were shut down on Wednesday, Grum's architects quickly revived the spam networking using new machines in both Russia and the Ukraine. But almost as quickly as those new servers sprung to life, they were again shut down by authorities.
Experts estimate that Grum's spam production may have accounted for as much as 50% of the web's total. So, will you notice an immediate difference in the amount of junk mail or scam-ridden chat messages? Perhaps, but with botnets such as this, as soon as one is taken down there are typically several more lined up to take its place. Still, lowing the hammer on Grum is definitely a big step towards a safer internet.