Is there any appliance or software that can passively monitor a network to see if any ME commands and related data flow back and forth from an attacker? It see

Is there any appliance or software that can passively monitor a network to see if any ME commands and related data flow back and forth from an attacker? It seems to me that using ME as an _actual_ backdoor would be only an occasional thing, (maybe once in a lifetime thing), but it would be so cool to at least know when it is happening and maybe capture some packets.