31k Aussies have had their banking details compromised
Banking passwords belonging to 31,000 Australian customers have been stolen using malware and traded through the dark web, with experts fearing customers could lose their money.
According to an investigation by cyber intelligence researcher Dvuln, banking details belonging to at least 14,000 CommBank customers, 7000 ANZ customers, 5000 NAB customers and 4000 Westpac customers are available on the messaging platform Telegram and the dark web.
Dvuln said Australian financial security was facing a silent threat of infostealer malware harvesting data but not from inside the walls of financial institutions.
Dvuln co-founder Jamieson O'Reilly told NewsWire there was a thriving underground where criminals had changed the way they scammed victims.
'Instead of the traditional ransomware attack where they lock your computer and ask for money, criminals have found that it's much more lucrative to not be detected, not make any noise and just leave the malware on your device as long as possible so that every time you change your information, it is sent back to the criminal gangs that control it.
'It means they have this continuous stream of information that they can sell to other cybercriminals.
'So rather than one payment with a ransom, they're getting year-on-year payments in some cases where they've got a device infected for a long time.'
Mr O'Reilly said while the research focused on the banks, there was a much larger problem for Aussie households.
'We chose to highlight the banking risk because that would get the everyday Australian's deserved attention, but there was a lot more information,' he said.
'If your computer is infected, it's not just your banking credentials. It's your whole personal identifiable information, your digital life,' he said.
The hack, known as an infostealer, works by individual users' devices having malicious software unknowingly installed.
The software will collect and send as much valuable data as possible to a cybercriminal before it is traded on the dark web.
It overwhelmingly targets computers running on Windows and, as well as passwords, can capture credit card details, cryptocurrency wallets, local files, and browser data, including cookies, user history and autofill details.
Some of the 31,000 devices mentioned above were infected as far back as 2021 but would still provide valuable data to hackers.
Mr O'Reilly said this number represented just a fraction of the total number of people who could have been impacted by this scam.
Globally, separate research from Kela shows more than 3.9 billion passwords have been stolen using this scam method.
Dvuln said it started the research following Australia's superannuation hack in early April.
Worse still, Dvulen research shows the scammers have evolved beyond simple password theft and are now able to capture authentication cookies, allowing them to bypass multi-factor authentications.
'It's important to say that MFA and all the other security controls are not useless, they definitely have a place,' Mr O'Reilly said.
'Use them whenever you get the opportunity.
'They won't stop this virus getting on your device, but they will make it harder for criminals to actually use the information on your device.'
Australian Banking Association chief executive Anna Bligh said the issue relates to data being accessed from individual personal devices such as phones and laptops, not from any breach of bank security systems.
'Keeping customers secure online is the top priority for Australia's banks. They continue to invest security defences to help keep customers safe, including using advanced intelligence systems to monitor both open and dark web sources for compromised customer credential,' she said.
Ms Bligh said if a bank became aware that a customer's credentials had been compromised, it could take steps to secure their account and advise them on how to prevent further activity.
What should Aussies do to protect themselves
Mr O'Reilly said it was important that Australians focused on good cyber-security awareness and evolved their thinking from traditional scams.
'I think what it shows, in terms of importance, is how much the public needs to wake up to the fact that criminals are making a good living off their information,' he said.
'And we need to get out of this mindset where if you're hacked, then you'll see big pop-up warnings on your computer.'
According to the Commonwealth Bank, there are a few tips that can help slow down these types of scams.
To enhance their security, customers should:
• Create unique, strong passwords and change them regularly
• Install and maintain reputable antivirus software
• Monitor their accounts and enable transaction notifications
• Contact their financial institution immediately if they notice anything suspicious
Commonwealth Bank also said it was using advanced intelligence systems to track the dark web for compromised credentials, block suspicious payments and adapt their defences based on real-time threats.

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