The company disclosed sensitive information about nearly 10 million Australian telecom subscribers that may have been compromised by a major hack by the country’s second-largest provider.
Optus CEO Kelly Bayer Rosmarin said a “sophisticated” actor was behind a cyberattack that gained access to the information of up to 9.8 million users.
The data accessed included the customer’s name, date of birth, phone number and email address, as well as a number of driver’s license and passport numbers.
No passwords or bank details were obtained, according to the Singapore-owned company.
It remains unclear whether the attack came from a criminal organization or the state, but Bayer Rosmarin said no ransom demands have been made.
“It is too early to rule out any possibility,” she said, adding that police and the Australian government were investigating. “We still don’t know who these attackers are and what they want to do with this information.”
The Australian Competition and Consumer Commission has warned potentially affected Australians – a figure equivalent to almost half the country’s population – that they could be at risk of identity theft.
“Optus customers should take immediate steps to secure all of their accounts, especially their bank accounts and accounts. You should also monitor for unusual activity on your accounts and watch out for contact scammers,” the watchdog said.
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