“Here’s how it worked: A group of hackers bought ads across Yahoo’s network — finance, games, news, etc., as well as Yahoo.com. When a computer visited one of those sites, it would download malware code. At that point, the malware searched around for an out-of-date version of Adobe Flash, which could be used to commandeer the computer and hold it for ransom, or redirect the browser to websites that pay hackers for traffic.”
Read the full article at consumerist.com.