AttACker teChniques And motivAtions 101
charging the advertisers. Ad networks can also use browser cookies
to determine when the same user is clicking an ad multiple times.
Botnets solve these problems for the fraudster because each infected
computer has a different IP address and a different browser. In 2006,
Google discovered the Clickbot.A botnet, a click fraud botnet con-
sisting of more than 100,000 nodes.
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While the distributed nature of botnets benefits click fraud, ...