Waikato DHB cyber attack 'hackers' make contact with health bosses 19 May, 2021 07:14 AM 4 minutes to read Waikato DHB's IT centre is the target of a major cyber security attack. Video / Waikato DHB Waikato DHB's IT centre is the target of a major cyber security attack. Video / Waikato DHB Ben Leahy is a reporter for the New Zealand HeraldBen.Leahy@nzherald.co.nz Hackers claiming to be behind a cyber attack that led to surgeries being postponed at Waikato public hospitals this week have made contact with health officials. Tuesday's attack brought the Waikato District Health Board's entire IT network down, with officials now hoping to get the system back up and running by the weekend.