Some of the stolen material, including financial and IT records, has already appeared on the darknet.
The K Club resort was hit by a ransomware attack just days before hosting the Irish Open.
Hackers allegedly gained access through the resort’s virtual private network and stole large volumes of data before encrypting files.
Some of the stolen material, including financial and IT records, has already appeared on the darknet.
The group, calling itself SafePay, left a ransom note on the club’s systems, according to The Sunday Times.
It typically demands payments in bitcoin, often amounting to 1–3 per cent of a company’s annual turnover.
The K Club confirmed a “cyber incident” but said no guest information was compromised.
It has notified the Data Protection Commission and introduced additional security measures.
Cybersecurity specialists believe the attackers are likely to be Russian-based.
Gardaí are aware of the incident.
The resort declined to say whether a ransom was paid.

Kildare County Council Reveal Funding Streams For Footpath And Street Provisions In The County
Road Closures Expected As Overnight Motorway Works Set To Take Place In Kildare
Motorcyclist Dies After Road Collision In Lucan
Kildare County Council Launch Five Year Biodiversity Action Plan
Irish Music Month Confirmed For September 2026
Online Library Services Unavailable Next Monday Across Kildare Due To Maintenance
Permission Granted For Controversial Solar Farm On Kildare/Laois Border
Clane Law Student Isobella Perrie Sullivan Granted Bail