https://techcrunch.com/2018/02/12/browsealoud-coinhive-monero-mining-hack/

Over the weekend, a little piece of malware was hard at work mining cryptocurrency on government computers. Security researcher Scott Helme first noticed the malware, which he believes was running on more than 4,000 sites, including the U.K.’s Information Commissioner’s Office (ico.org.uk) and the website for the American court system (uscourts.gov).

The malware leveraged the victims’ devices to generate the cryptocurrency Monero by performing complex, CPU-intensive calculations, a mathematical process known as “mining” that’s used to create some cryptocurrencies.