Kfm understands that some of the stolen material, including financial and IT records, has already appeared on the darknet.
The K Club has told Kfm that "no ransom was paid to hackers" following a cyber attack at its premises.
When asked if customer data was compromised, a spokesperson said “no guest or client information was accessed during" the incident.
They said The K Club has implemented several additional security measures to safeguard information.
Kfm understands that some of the stolen material, including financial and IT records, has already appeared on the darknet.
Hackers also demanded a ransom.
It is understood that the hackers are Russia-based.
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