>>Tactic+(OP)
Different. In 2018 there was articles [0] talking about hacked Supermicro servers being in the wild that had (simplifying) extra ICs in their motherboard, like some short of supply chain attack.
But AFAIK, tangible evidence never surfaced. [1]
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0: https://news.ycombinator.com/item?id=18176620
1: https://news.ycombinator.com/item?id=19910537