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Singtel Unit Hit by Cyber Attack Weeks After Optus Breach

Singtel unit Dialog said it realised a small sample of its data, including some employee personal information, had been published on the dark web

Singtel is offloading digital marketing arm Amobee to London-listed Tremor for $239 million as it sharpens focus on its key businesses.
A man looks out of the window under a Singtel signage at their head office in Singapore. Photo: Edgar Su, Reuters.


Singapore Telecommunications said on Monday that it suffered a cyber attack just weeks after its subsidiary firm Optus was hit by hackers.

The attack was targeted at Singtel’s Dialog unit, an Australia-based information technology services consulting firm, affecting 1,000 current and ex-employees, as well as a handful of clients.

Dialog said it realised “a very small sample” of its data, including some employee personal information, had been published on the dark web.

Singtel had acquired Dialog in April for A$325 million ($206.57 million).

The 10 Million Hack

The breach came only weeks after Optus, Australia’s second-largest mobile operator, said the data of up to 10 million customers had been compromised, triggering an overhaul of consumer privacy rules for data sharing between telecommunication firms and banks.

The Singapore-based telecom firm said Dialog’s systems were completely independent of Optus and information technology unit NCS, and that there was no evidence of any link between the incidents.

Shares of Singtel closed at down 1.58%.

  • Reuters, with additional editing from Alfie Habershon


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Alfie Habershon

Alfie is a Reporter at Asia Financial. He previously lived in Mumbai reporting on India's economy and healthcare for data journalism initiative IndiaSpend, as well as having worked for London based Tortoise Media.


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