The hacker who claims to be behind the attack has said that they have extracted the data of 162 million users.
According to an announcement from CBA on behalf of PTBC, the cyber attack occurred when hackers gained “unauthorised access to a web-based software application used for project management”.
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Despite the attack, “PT Bank Commonwealth services continue to operate as normal”.
CBA has said that while PTBC is its Indonesian subsidiary, its own systems are separate from those accessed by hackers.
“Commonwealth Bank of Australia’s systems are segregated from PTBC’s systems,” it said.
“We are working closely with PTBC and supporting their efforts in this matter.”
The Commonwealth Bank of Australia has been contacted for comment on the issue.
Daniel Croft
Born in the heart of Western Sydney, Daniel Croft is a passionate journalist with an understanding for and experience writing in the technology space. Having studied at Macquarie University, he joined Momentum Media in 2022, writing across a number of publications including Australian Aviation, Cyber Security Connect and Defence Connect. Outside of writing, Daniel has a keen interest in music, and spends his time playing in bands around Sydney.