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Telstra service provider hit by cyber attack as hackers claim SIM card information stolen


Hackers have claimed they have gained access to “tens of thousands” of SIM cards after a cyber attack against an Australian telecom firm.

The victim, Melbourne-based Schepisi Communications, describes itself as a “platinum partner” of Telstra that supplies phone numbers and cloud storage services on behalf of the telecommunications giant.

The company’s website has been offline for days after a hacker group said it infiltrated the company’s data systems and posted a disturbing ransom note on the dark web.


“We have a large amount of data on mobile devices, tens of thousands of SIM cards … financial information, contracts, banking information,” the ransom note read.

Telstra confirmed there had been a security breach that affected one of its “dealers”.

“We’ve been in contact with the dealer and been told some ‘high level’ Telstra business customer information, such as mobile phone numbers, may have been accessed from its order fulfilment system,” a Telstra spokesman said.


Excerpts of documents posted on the dark web as part of the extortion attempt appeared to show customer phone numbers and addresses.

Among Schepisi’s customers that appeared to have had their information exposed were global food conglomerate Nestle, a Melbourne radio station, an Australian property management firm, and a financial services company based in Victoria.