In December 2017, ~ 4,700 BTC were stolen from a company’s wallet.
The stolen Bitcoins were the assets of the said company’s customers.
This company offers a platform for renting computing power for mining various cryptocurrencies on the Internet. The computing power is provided by their customers and rented to users via the platform.
The processing of the payments (deposits for renting computing power and payments to the providers of computing power) is handled by the company concerned.
At the Bitcoin rate at that time, the value of the stolen Bitcoins was ~ 53,815,000.00 EUR.