Affected organizations are cropping up in the Czech Republic and Norway.

The group say it's dismantled nearly 3,000 malicious domains and identified more than a 2,000 software vulnerabilities.

It's the latest sign that malicious hackers aren’t holding off attacking health care facilities during the pandemic.

The Brno University Hospital has been conducting regular tests for the novel coronavirus, according to media reports.

This time the intrusion "was an extremely sophisticated attempt against us that had the intention to leave no traces of the intruder or their purpose,” the company's CISO says.

Four Bulgarians were arrested Thursday as part of an international police effort.