Even at the time these wouldn't have been as severe as "only run on an air gapped computer and burn the computer afterwards". That type of technology wouldn't be part of a leak like this, but given the amount of undocumented opcodes in various silicon (processors, BMC, TPMs, etc) I wouldn't be surprised if it did exist.
The Eternal stuff for windows kind of captured everyone’s attention, but a LOT of the older Unix tools were ignored for the most part.
There’s a lot of neat tricks to be learned by reversing them - even today.
They are G0020 in the mitre att&ck framework