The graphic above is from a report from a group that monitors studies online attacks and other badness in the underground economy. It suggests an increasing divergence in the way criminals are managing botnets. Botnets are large amalgamations of hacked PCs that are used for everything from snarfing up passwords to relaying spam and anonymizing traffic for the bad guys. The number of Web-based botnets has continued to climb, doubling in number over the last six months, the report says.”]
Source: https://krebsonsecurity.com/2010/01/the-rise-of-the-point-and-click-botnets/