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Chinese Hackers Compromised Telecom Firms, Researchers Say

  • Hacking groups said to exploit flaws in Microsoft Exchange
  • Attackers pulled off ‘holy grail of espionage’ in breaches
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Chinese state-backed hacking groups compromised at least five global telecommunications companies and stole phone records and location data, according to cybersecurity researchers.

The hacking groups waged a campaign across Southeast Asia from 2017 to 2021, in some cases exploiting security vulnerabilities in Microsoft Corp.’s Exchange servers to gain access to telecommunication companies’ internal systems, according to a new report published Tuesday by U.S.-based security firm Cybereason Inc.