On Wednesday morning, Hillel Yaffe said it had received no advance warning of the attack on its computer systems.
Urgent medical services at the hospital were continuing as usual as it switched to alternate systems.
Mickey Dudkiewicz, the director of the hospital, told Channel 12 news that the hackers didn’t ask for a specific sum of money to return the systems to operation.
With computer systems down, hospital staff resorted to logging admissions with pen and paper.
Heavy delays in treatment were also caused due to doctors having to constantly walk physically between departments in order to review test results.
With patients being turned away, the Laniado Hospital in Netanya said it was coordinating with the Magen David Adom ambulance service and was ready to receive those who needed treatment that was not available at Hillel Yaffe due to the attack.
Hillel Yaffe serves hundreds of thousands of people.