https://www.theverge.com/2018/10/4/17935868/chinese-spies-microchip-hack-servers-apple-amazon-supermicro

Chinese spies have infiltrated the supply chain for servers used by nearly 30 US companies, including government contractors, Apple, and Amazon, according to an explosive report from Bloomberg Businessweek.

The operation is perhaps the most audacious example of hardware hacking by a nation state ever publicly reported, with a branch of China’s armed forces reportedly forcing Chinese manufacturers to insert microchips into US-designed servers. The chips were “not much bigger than a grain of rice,” reports Bloomberg, but able to subvert the hardware they’re installed on, siphoning off data and letting in new code like a Trojan Horse.