Norton has denied several requests for an interview since May 9.
Norton provides health care across the Louisville-area and serves about 600,000 patients a year.
The "cyber event" that ended with several systems being taken offline across North Healthcare properties earlier this week came as no surprise to Dr. Roman Yampolskiy, director of the cybersecurity lab at the University of Louisville.
Hackers recently attacked in Bardstown, trying to get the city to pay big to restore its internet systems.
The zoo sent an email on Wednesday notifying people of a ransomware attack.
Cyber security breaches have been on the uptick over recent years with much of the malware coming from China and Russia.
Already this year, e-skimmer criminals are active, according to research from RiskIQ.
The announcement came after Google-owned home security system Nest said Jan. 6 that it would require all customers to use two-factor authentication starting this spring.
The Capital One data breach is stoking fears about a new wave of Social Security scams, which have been on a precipitous rise in 2019.