A PoC/demo demonstrating code injection via COM (using the IRundown::DoCallback() mechanism) to execute a payload in the context of a selected process, including lsass.exe (or any other PID).
Mastering Living off the Process in Offensive Security
No need for overusing WriteProcessMemory, VirtualAlloc, injecting a DLL, etc. This way, everything you need to manipulate the remote process is self-contained and already available to the process.