http://www.techradar.com/news/nefarious-bitcoin-miners-have-hijacked-government-websites-worldwide

In a hack of unprecedented scope, thousands of government websites around the world have been compromised as part of a criminal scheme to mine a cryptocurrency called Monero, which like Bitcoin and Ethereum is blockchain based, but with a greater focus on transaction privacy.

Security researcher Scott Helme made the initial discovery, publishing an enormous list of 4,275 government sites spanning several countries, including the US, UK and Australia, that were infected by a malware known as Coinhive.