Australia's number two telecommunications company, Optus, said on Saturday it was contacting customers about a cyberattack that accessed personal details of up to 10 million customers, in one of Australia's biggest cybersecurity breaches. Chief executive Kelly Bayer Rosmarin said on Friday she was angry and sorry that an offshore-based entity had broken into the company's database of customer information, accessing home addresses, drivers licence and passport numbers of the equivalent to 40% of Australia's population. In an update on Saturday, the company, owned by Singapore Telecommunications Ltd, said it was contacting "all customers to notify them of the previously announced cyberattack’s impact, if any, on their personal details".
Australian No. 2 telco Optus, owned by Singapore Telecommunications Ltd, said it will contact up to 10 million customers whose personal details were taken in a "sophisticated" hack, but added no corporate clients were compromised. Optus chief executive Kelly Bayer Rosmarin said she was angry and sorry that an offshore-based entity had broke into the company's database of customer information, accessing home addresses, drivers licence and passport numbers in one of the country's biggest cybersecurity breaches. As many as 9.8 million accounts may be compromised, equivalent to 40% of Australia's population, but "that is the absolute worst case scenario (and) we have reason to believe that the number is actually smaller than that", Bayer Rosmarin said.
Optus, the Australian unit of telecoms firm Singapore Telecommunications, said it was investigating the unauthorised access of customer details including home addresses, driver's licence and passport numbers, after a cyberattack. Wireless carrier Optus said in a statement on Thursday it had immediately shut down the attack after discovering it, and that payment details and account passwords had not been compromised. Optus CEO Kelly Bayer Rosmarin said the company had notified Australian Federal Police after noticing "unusual activity".