An attack that used a tiny microchip installed onto Super Micro servers during the manufacturing process by sub-contractors in China reached almost 30 U.S. companies, including Amazon and Apple, compromising America’s technology supply chain, according to extensive interviews with government and corporate sources.
Nested on the servers’ motherboards, testers found a tiny microchip, not much bigger than a grain of rice, that wasn’t part of the boards’ original design. Amazon reported the discovery to U.S. authorities,...