The 2023 intrusion at an American telecommunications company, which hasn’t been previously reported, came about a year before US government officials and cybersecurity companies said they began spotting clues that Chinese hackers had penetrated many of the country’s largest phone and wireless firms. The US government has blamed the later breaches on a Chinese state-backed hacking group dubbed Salt Typhoon.
Corporate investigators found evidence that Chinese hackers broke into an American telecommunications company in the summer of 2023, indicating the country’s attackers penetrated the US communications system earlier than publicly known.
Investigators working for the telecommunications firm discovered last year that malware used by Chinese state-backed hacking groups was on the company’s systems for seven months starting in the summer of 2023, according to two people familiar with the matter and a document seen by Bloomberg News. The document, an unclassified report sent to Western intelligence agencies, doesn’t name the company where the malware was found and the people familiar with the matter declined to identify it.
