The cyber attacker in Optus’ 2022 data breach had a “high degree of knowledge” of its confidential systems, the telco has claimed, as it seeks to counter allegations by the communications regulator that the hack was unsophisticated.

Optus is being sued in the Federal Court by the communications regulator, claiming it failed to protect confidential customer information before it was hit by a cyber attack on 17 September 2022 at 8.17am. The attack lasted until around 3.45 am on September 20.

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