This has been a problem that is found all around. Now this is being found within a high security premises. Almost every airport used to have high security, beyond that it is hard to enter. This surely should have taken place with the support of an employee. Such kind of mining softwares were found to be installed illegally on different computers. Often we can find news that states about illegal mining.

This kind of activities were to overcome the increased electricity consumption that takes away the profiting out of mining. Came across an article that gives some detailed data on mining practices Mining Cryptocurrency using Company Hardware and Electricity.