A ransomware group has threatened to release Medibank client data as Australia's largest health insurer faces a possible class action over the hacking of sensitive information for 9.7 million current and former customers.
Medibank has confirmed almost 500,000 health claims were accessed and the personal details of former and current customers were exposed when an unnamed group hacked into its system weeks ago.
About midnight AEDT, a ransomware group posted to its dark web blog that "data will be publish (sic) in 24 hours".
