Privilege Escalation

Remember that your implant needs to execute as root in order to sniff traffic for the portknocks? If your backdoor is initially executed by a non-root user and you don't have any built in methods of privilege escalation the implant becomes useless.

I won't tell you what to do here, but there are plenty of resources out there, here are some ideas:

Submit your code that allows your implant to escalate privileges.