Suspected Chinese hackers are behind an ongoing cyberespionage campaign against U.S. technology companies and legal firms, stealing national security secrets often while remaining undetected, according to Alphabet’s Google.
The hacking group, which Google tracks under the code name UNC5221, are "the most prevalent adversary in the U.S. over the past several years” in terms of frequency, severity and complexity of incidents, said Charles Carmakal, chief technology officer at Google Cloud’s Mandiant consulting arm.
The attackers are described as extraordinarily advanced and stealthy. They dwell undiscovered in their victims’ networks for an average of more than a year, all the while stealing information about U.S. national security and international trade, researchers said. The same group is also targeting key European industries.
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