The Abuse of Crypto Coin Miners

The increase in value of Bitcoin and availability of JavaScript based Crypto Coin Miners has resulted in malicious actors hacking WordPress sites or hiding coin mining scripts within web adverts.
Recently YouTube displayed an advert with a hidden coin mining script for two hours.

Sources used:
https://www.symantec.com/blogs/threat-intelligence/browser-mining-cryptocurrency
https://arstechnica.com/information-technology/2017/10/a-surge-of-sites-and-apps-are-exhausting-your-cpu-to-mine-cryptocurrency/
https://www.engadget.com/2017/12/15/as-online-ads-fail-sites-mine-cryptocurrency/
https://github.com/keraf/NoCoin
https://www.theverge.com/2017/11/8/16617794/chrome-redirect-blocking-announced-google
https://www.infosecurity-magazine.com/news/stealthy-cryptominers-web-ads/
https://www.infosecurity-magazine.com/news/browserbased-cryptomining-rises/
http://www.techtimes.com/articles/219792/20180127/hackers-hijack-google-s-doubleclick-advertisement-system-on-youtube-for-cryptocurrency-mining.htm
https://blog.malwarebytes.com/threat-analysis/2018/01/rig-exploit-kit-campaign-gets-deep-into-crypto-craze/
https://arstechnica.com/information-technology/2018/01/now-even-youtube-serves-ads-with-cpu-draining-cryptocurrency-miners/