My profile has an example to answer your second question. Nobody here would be able to either by knowledge or by classification be able to answer your first question. Unless you have a smoking gun that points to shenanigans then your guess would be good as anyone elses. At some point one must either trust or distrust their hardware and operate based on that level of trust. That is probably not the answer you wanted. If you found something, then document facts, observations, dates, times, versions of hardware, BIOS, anything else notable and then shred it and just stop using the device because if you are right the people involved would likely be dangerous. Unless you are a hardware developer and are able to diagnose hardware running machine language then this would at best just create FUD.