As the U.S. reportedly readies for retaliation against Russia for hacking into some of the government’s most sensitive federal networks, the U.S. is facing another old adversary in cyberspace: China.
Microsoft last week revealed a new hacking group it calls Hafnium, which operates in, and is backed by, China. Hafnium used four previously unreported vulnerabilities — or zero-days — to break into at least tens of thousands of organizations running vulnerable Microsoft Exchange email servers and steal email mailboxes and address books.
It’s not clear what Hafnium’s motives are. Some liken the activity to espionage — a nation-state …
