Singtel OPTUS Priorities for FY24

1. 2. Optus Cyberattack Update • In Sep 22, Optus was subject to a malicious cyberattack targeting certain customer data • • Optus' network, systems & services were not compromised & remained fully operational & available As previously indicated, the attack was undertaken by a motivated & determined criminal(s) who targeted Optus with techniques designed to evade detection & bypass security controls The attack was detected & shut down by Optus; it communicated swiftly and transparently; it notified relevant Government agencies & regulators; & worked closely with the police & other authorities to protect customers In its response, Optus' focus on protecting customers, accepting accountability & apologising, & committing to taking steps to do better were all important factors in rebuilding trust & returning to strong customer growth in the second half Putting customers first Committed to cyber excellence ■ ◉ Sustained positive net add momentum since Dec 22 Ongoing customer support, free credit & identity All customers communicated with bespoke messaging monitoring, & payment for document replacement costs² ◉ Continued investment in cyber capability; currently stopping over 100M cyberattacks per year Funding to advance cyber security innovation & digital skills Sharing learnings with the aim of improved national cyber defences The cyberattack is still subject to investigation by the Australian Federal Police who are working with the FBI. There is no indication as to whether this is an individual or group. As previously disclosed, a provision of A$140m was taken to cover these costs. Subsequently, a Class Action has been filed which will be vigorously defended. 7 Singtel

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