Botnet grinds to a halt

We’ve been observing quite a small botnet – around 8000 zombie-machines – recently. Just a few days ago it exploded and started growing very quickly. The growth only stopped early yesterday evening – around 5pm Moscow time – when the overall total number of zombies was about 14000!

It’s interesting to take a look at how the network grew. We collected some stats which are shown in the graph below:

We have found that the botnet is mostly targeting machines in Russia. Maybe this explains why its growth slowed during what is night-time in the Russian Federation.

We detect the Trojan which is used to spread the infection as Trojan-Downloader.Win32.Small.ehe. Detection was added on 30th July 2007.

We’ll be keeping an close eye on this network and will keep you posted about new spikes of infections, so watch this blog.

Botnet grinds to a halt

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