Embattled Medibank faces 48-hour outage as cyber security upgrade begins – IT PRO




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Medibank plans to shut down its systems for a weekend while it carries out essential upgrades to its cyber security system, with help from Microsoft experts.
The company was hit by a cyber attack in October that saw data belonging to the company’s 9.7 million current and former customers exposed. Hackers are believed to have had access to a range of data, including passport numbers and health claims data.
The private healthcare insurance company said it plans to take systems belonging to Medibank, and its subsidiary ahm, temporarily offline from 08:30pm Friday 9 December, to undertake maintenance and strengthen its systems to boost its security. The company expects the systems to be back online by Sunday 11 December.
When the systems are down, customers will be unable to access Medibank or ahm services through the company’s website or app. Its retail stores and customer contact centre is also set to close on Saturday 10 December. However, health services like its 24/7 critical health support lines will remain open.
Medibank, one of Australia's largest private health insurance providers, said the work forms the next phase of its ongoing effort to safeguard its network. As part of this, Microsoft IT experts are flying in from across the Asia Pacific region and will join the company at its Melbourne headquarters. It isn’t clear what specific assistance the tech giant will provide.
Medibank said the work has required several weeks of preparation, given the complexity associated with taking systems offline entirely.
“While there has been no further suspicious activity detected inside our systems since 12 October 2022, as part of the next stage of our work we are undertaking maintenance across some of our systems to further strengthen security,” said the company.
Medibank said it has boosted its security since the attack took place. This includes implementing two-factor authentication at its contact centres, aiming to increase the security for customers when they call for support.
The Australian company has also boosted its existing monitoring, added more forensics and detection capabilities across its systems and network, and has also improved its analytical support by hiring specialist third parties.
The company is continuing to analyse its customer data that was released by the hacker on the dark web. It has found that the number of stolen customer files hasn’t changed.
It will also begin contacting customers who have limited provider data stolen, including provider numbers, discharge data, and admission date.
“Like most of the data stolen, this data has been released in a raw form and is hard to understand,” said the company.
Australia has been rocked by a series of high profile cyber attacks in recent months, which has led the government to begin developing a new cyber security strategy. The new plan aims to help the country strengthen its government networks and critical infrastructure, and build sovereign cyber security capabilities. Home Affairs minister Claire O’Neil said on 8 December that the country will also look to create a 100-person team which will be focused on hunting down hackers.
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