Grum botnet loses Dutch servers

ISPs in Russia and Panama are continuing to host Grum botnet command-and-control servers, after Dutch authorities silenced C&Cs in their country.

According to FireEye Research, two Netherlands-based servers were taken offline on July 17.

“With these two servers offline, the spam template inside Grum's memory will soon time out and the zombies will try to fetch new instructions but will not able to find them. Ideally this should stop these bots from sending more spam”, writes FireEye’s Atif Mushtaq. Mushtaq adds that the company believes Grum to be the world’s third-largest Spam botnet.