Separately, U.S. authorities sanctioned a Shanghai-based hacker, Yin Kecheng, whom they allege was involved in an unrelated breach of sensitive systems within the Treasury Department itself.

The APT27 cases accuse the duo—Yin 'Coldface' Kecheng and Zhou 'YKCAI' Shuai—of "multi-year, for-profit computer intrusion ...

Those charged included Chinese nationals Yin Kecheng and Zhou Shuai for their involvement in cyberattacks as far back as 2013. Both were identified as members of the APT27 hacking group ...