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    Data of up to 9 million Australian customers exposed to massive Optus hack

    “The exposed data can now be maliciously used to create false identities or as a starting point to further target users individually through spear-phishing campaigns. These campaigns will now be even more effective as cybercriminals have access to more information than just an email address,” he said.

    “While technical protection is a step forward in terms of cybersecurity maturity, I cannot emphasize the importance of training and educating business users enough, as people are always the weakest link when it comes to cybersecurity.”

    Unni said third-party risk is another area that requires a lot of attention, as larger organizations are regularly infiltrated through partnerships with third-party vendors.

    “The findings of the Australian Cyber ​​Security Center investigation into the Optus data breach will reveal the nature of the attack – whether it was the work of cybercriminals or a state-sponsored attack,” he said.

    “Optus users should remain vigilant for email providing support for this breach, even if the email appears to be from an authoritative or legitimate source. Optus customers should do their due diligence when it comes to cyber hygiene and avoid clicking links in emails unless their legitimacy has been validated.”

    Optus said contacting them through the My Optus app is the safest option, or call 133 937 for private customers and 133 343 for businesses.

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