The service of cloud mining NiceHash was attacked by hackers. After several hours of silence, the company confirmed that cybercriminals managed to steal customer funds.

The service for cloud mining NiceHash went offline in the morning of 6 December. The company limited itself to statements about "technical reasons," but some users noticed that the funds from their deposits were transferred to an unknown bitcoin address.

In the evening on 6 December, NiceHash confirmed in an official statement that the service became a victim of cybercriminals.

"Importantly, our payment system was compromised, and the contents of the NiceHash Bitcoin wallet have been stolen. We are working to verify the precise number of BTC taken," NiceHash wrote.

The service added that additionally to their own investigation, they reported about the incident to the relevant authorities and law enforcement. Due to the attack, NiceHash is stopping all operations for the next 24 hours.

Even before the official statement of NiceHash about the hacker attack, customers of the service began to suspect the worst. Many of NiceHash clients noticed that all their funds were withdrawn from their deposits.

First, users' funds were sent to one purse, and then all the bitcoins from it were transferred to another purse, which, apparently, also belongs to cybercriminals.

Within the last 24 hours, this purse accumulated more than 4730 bitcoins, which at the current rate exceeds $60 million.

Meanwhile, users began to discuss the incident on various forums trying to find out who are the founders and owners of NiceHash. The company's website reports only that the business address of NiceHash is located in the Slovenian capital Ljubljana.

NiceHash offers users to lease their mining capacities, either on GPU or ASIC devices, and also rent power from other customers. Regardless of the cryptocurrency mined, customers receive a reward in bitcoins.