Medibank has about 4 million customers but it is not known at this stage how many were caught in the breach. The sample is believed to come from ahm and contain information about international students who were policyholders. In a statement the insurer said the hacker also claimed to hold credit card information, but this has not been confirmed. This information contained names, addresses, dates of birth, Medicare numbers, phone numbers and medical claims data – including information about diagnoses, procedures and the location of medical services. The hacker shared a sample of 100 policies for verification. Medibank is understood to still be investigating but it is thought someone gained access using fake or compromised user credentials. The situation developed on Wednesday when Medibank disclosed to the Australian stock exchange that hackers had contacted the company to “negotiate” over the future of 200 gigabytes of customer data they said had been stolen from company systems.Īlthough Medibank initially claimed there was “no evidence that customer data has been accessed”, the public learned the scale of the breach on Thursday as the Australian Signals Directorate and the Australian federal police started to investigate. The next day the company announced it had restored systems and said it was “still responding” to the incident. On 13 October, Medibank said it had taken offline the data and policy systems of its budget provider, ahm, and its international student division after a “cyber incident”. Here is what we know so far about the data breach. In the wake of the Medibank breach, the cybersecurity minister, Clare O’Neil, warned of a new world “under relentless cyber-attack”, while Australia’s security agencies scrambled to manage the fallout.
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