Practically, backdoored firmware doesn't necessarily run services and communicates to the mothership all the time, nor does it communicate using conventional pr

Practically, backdoored firmware doesn't necessarily run services and communicates to the mothership all the time, nor does it communicate using conventional protocols. It creates invisible hole in the system beyond OS's reach to detect and repair it. Furthermore, the hardware (or chip based) backdoor is way more sophisticated, typically have been in use in the servers of foreign governments of interest. This chips can be used to take full control of a server, and the whole network when places strategically. In another note, hard RTOS are not used in servers, so performance cannot be compared with benchmarking tools.