Australian insurer back online after cyberattack

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Breach Notification, Cybercrime, Fraud Management and Cybercrime

Medibank Group says no evidence of data compromise

Mihir Bagwe (MihirBagwe) •
October 14, 2022

Image: Shutterstock

A private health insurance company serving nearly 4 million Australians has restored access to its policy writing systems after taking them offline following a cyber incident.

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Medibank Group said there is no evidence of access to customer data despite detect Wednesday “unusual activity” on its network.

The incident led the listed company to interrogate the Australian Securities Exchange on Thursday to suspend trading in its shares until Monday.

Medibank is one of Australia’s largest health insurers, providing private health insurance and healthcare services to over 3.9 million Australians. It ended 2021 with health insurance premium income of A$6.7 billion.


Chronology of events

Medibank says it detected unusual activity on its network on Wednesday. In response, it hired anonymous cybersecurity firms and took some of its systems to offline customers as a precaution.

On Thursday, Medibank CEO David Koczkar acknowledged the cyber incident to his customers and also asked the Australian Securities Exchange to impose a “trading halt”.

Medibank notified the Australian Cyber ​​Security Center, the Australian Prudential Regulation Authority and the Office of the Australian Information Commissioner.

It sent email and text notifications to customers on Thursday explaining what had happened and the company’s response. The company has already sent this notification to 2.8 million customers on Thursday and was in the process of contacting all the others on Friday.

Until Thursday, while some systems remained offline, Medibank’s health services, which include telehealth and home care, were unaffected. On Friday morning, Koczkar informed its policy customers that the systems were back online.

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