Telstra : Australian Telecommunications Company's Third-Party Avaddon Ransomware Attack Results In Stolen SIM Card Data. Hackers have claimed they have gained access to tens of thousands of SIM cards after a cyber attack against an Australian telecom firm.

https://www.theaustralian.com.au/breaking-news/telstra-service-provider-hit-by-cyber-attack-as-hackers-claim-sim-card-information-stolen/news-story/2ff32b2e3634506882102e9c9d012994