Find "Network Service" Token

I am trying to get an ACCESS_TOKEN for the built-in Network Service account. From my limited understanding, Sessions are created for Local System, Local Service, and Network Service automatically.

I need to utilize a unc path, so I need some network access. I am doing this in a workitem, so it is a system thread. I want to impersonate the Network Service account to gain the required access.

Does anyone have any idea how to get a token for this account in a kernel mode driver?