An unknown hacker managed to hijack Coinhive’s CloudFlare account that allowed him/her to modify its DNS servers and replace the official JavaScript code embedded into thousands of websites with a malicious version. The Pirate Bay was caught secretly using a browser-based cryptocurrency miner on its site. Now the company is also looking ways to reimburse its users for the lost revenue due to breach. Some Antivirus products, including Malwarebytes and Kaspersky, have also started blocking Coinhives script to prevent their customers from unauthorised mining.
Source: https://thehackernews.com/2017/10/coinhive-cryptocurrency-miner.html