An ambitious group of suspected state-backed hackers has been burrowing into telecoms to spy on high-profile targets across the world, a US cybersecurity firm said in a report published on Tuesday.
Boston-based Cybereason said the tactic gave hackers sweeping access to the targets’ call records, location data and device information — effectively turning the targets’ telecom against them.
Because customers were not directly targeted, they might never discover that their every movement was being monitored by a hostile power, Cybereason chief executive Lior Div said.
The hackers have turned the affected telecoms into “a global surveillance system,” Div said in a telephone interview. “Those individuals don’t know they were hacked — because they weren’t.”
Div, who presented his findings at the Cyber Week conference in Tel Aviv, Israel, provided scant details about who was targeted in the hack.
Cybereason had been called in to help an unidentified telecom last year and discovered that the hackers had broken into the firm’s billing server, where call records are logged, he said.
The hackers were using their access to extract the data of “around 20” customers, Div said.
Who those people were he declined to say, describing them as mainly coming from the worlds of politics and the military.
He said the information was so sensitive that he would not provide even the vaguest idea of where they or the telecom were located.
“I’m not even going to share the continent,” he said.
Cybereason said the compromise of its customer eventually led it to about 10 other firms that had been hit in a similar way, with hackers stealing data in 100 gigabyte chunks.
Div said that, in some cases, the hackers even appeared to be tracking non-phone devices, such as vehicles or smartwatches.
Cybereason said that it was in the process of briefing some of the world’s largest telecoms on the development.
The GSM Association, a group that represents mobile operators worldwide, said in an e-mail that it was monitoring the situation.
Who might be behind such hacking campaigns is often a fraught question in a world full of digital false flags.
Cybereason said all the signs pointed to APT10 — the nickname often applied to a notorious cyberespionage group that US authorities and digital security experts have tied to the Chinese government, but Div said that the clues they found were so obvious that he and his team sometimes wondered whether they might have been left on purpose.
“I thought: ‘Hey, just a second, maybe it’s somebody who wants to blame APT10,’” he said.
Chinese authorities routinely deny responsibility for hacking operations. The Chinese embassy in London did not immediately return a request seeking comment.
Div said that it was unclear whether the ultimate targets of the espionage operation were warned, saying that Cybereason had left it to the telecom to notify its customers.
Div added that he had been in touch with “a handful” of law enforcement agencies about the matter, although he did not say which ones.
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