Structure of a Click Fraud Botnet is an interesting introduction into how Click fraud can be perpetrated using a ‘botnets’. The more detailed technical paper explains that a clickbot is a software robot that clicks on ads to help an attacker conduct click fraud — i.e. earn money from PayPerClick advertising with ‘fraudulent’ clicks. Bad clickbots infect machines in order to get many different IPs to form a ‘botnet’. Many of the popular virus scanners did not detect clickbot viruses. One example grew relatively slowly but still at an impressive rate of just over a 100 machines in mid-May to more than 100,000 in mid-June.
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