High-powered mining rigs are usually needed to mine cryptocurrency, but not if you can get website visitors to do it for you. Hackers are now injecting cryptocurrency mining scripts into web advertising platforms to make a quick buck, security researchers have found. Trend Micro wrote in a blog post Wednesday that its researchers tracked web miner traffic linked to MSN.com, a popular ad-supported home page, which was displaying an ad that was using a computer's processor to silently mine cryptocurrency in the background. Also: Hackers are cashing in on cryptocurrency mining -- but here's why they're avoiding bitcoin Hackers had injected the widely-used Coinhive code into an ad supplied by the AOL advertising network. Trend Micro alerted AOL to the bad ad, which -- two days later -- was pulled offline.