Cyberattacks on dozens of American companies have been traced to an area on the outskirts of Shanghai that houses a Chinese military unit, according to a report out Tuesday by Mandiant, a U.S. cybersecurity company.
The 60-page document, first reported by The New York Times, says the group behind the attacks — nicknamed "Comment Crew"— is the most prolific the company has ever tracked and has been hacking U.S.