Yesterday was security day at Google, they even gave away 2GB of storage to those who went through a simple security questionnaire on their Google account. On the ad network side, Google announced they have automated the blocking of traffic from the top three fraud botnets. These three botnets accounted for over 500,000 infected machines.

Google said “today we’re further reinforcing our existing botnet defenses across our ad systems through a new feature that automates the filtering of traffic from three of the top ad fraud botnets, amongst those we are monitoring and defending against.” “One of the key benefits of this new feature is that it is resilient to possible changes to the malware that generates this botnet traffic,” they added.

What are botnets? Google explained:

They made a point to call out one of the botnets named Bedep and as well as the other two were named Beetal and Changthangi.

Forum discussion at Google AdWords Help and Google+.