Found out HTTrack and tumbled upon same NTLM problem. Thanks Rich and others to
point me to right direction.

I just (4.5.2016) got HTTrack working to mirror Sharepoint2013.

I didn't get the capture URL -function (inside HTTrack) to work whatever I
tried.

I used Fiddler as a proxy server.
<https://www.telerik.com/download/fiddler>
Fiddler Web Debugger (v4.6.2.3)

This was the winning combination:

Fiddler:
- Started Fiddler

- located Fiddler proxy address (Tools --> Fiddler Options --> Connections
tab)
. listens port: 8888 and following checkboxes should be checked: Act as system
proxy on startup and Monitor All connections and DefaultLan

- In Fiddler Automatically Authenticate has to be checked (Rules -->
Automatically Authenticate)

- leaving Fiddler open and started HTTrack

HTTrack:
- Created project

- Add URL
. gave URL and Username and Password

- Set Options and Proxy tab put proxy address 127.0.0.1 and port 8888



And when starting Mirroring you should see in the Fiddler  a lot of request
for your pages and Process name should be winnhtrack.


Hope this helps.