In 2013, cybersecurity firm Mandiant published a blockbuster report on a state-sponsored hacking team known as APT1, or Comment Crew. The Chinese group achieved instant infamy, tied to the successful hacks of more than 100 US companies and the exfiltration of hundreds of terabytes of data. They also vanished in the wake of being exposed. Now, years later, researchers from security firm McAfee say they’ve found code based on APT1–associated malware cropping up in a new set of attacks.

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