Responder

Usage: responder -I eth0 -w -r -f
or:
responder -I eth0 -wrf

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -A, --analyze         Analyze mode. This option allows you to see NBT-NS,
                        BROWSER, LLMNR requests without responding.
  -I eth0, --interface=eth0
                        Network interface to use, you can use 'ALL' as a
                        wildcard for all interfaces
  -i 10.0.0.21, --ip=10.0.0.21
                        Local IP to use (only for OSX)
  -e 10.0.0.22, --externalip=10.0.0.22
                        Poison all requests with another IP address than
                        Responder's one.
  -b, --basic           Return a Basic HTTP authentication. Default: NTLM
  -r, --wredir          Enable answers for netbios wredir suffix queries.
                        Answering to wredir will likely break stuff on the
                        network. Default: False
  -d, --NBTNSdomain     Enable answers for netbios domain suffix queries.
                        Answering to domain suffixes will likely break stuff
                        on the network. Default: False
  -f, --fingerprint     This option allows you to fingerprint a host that
                        issued an NBT-NS or LLMNR query.
  -w, --wpad            Start the WPAD rogue proxy server. Default value is
                        False
  -u UPSTREAM_PROXY, --upstream-proxy=UPSTREAM_PROXY
                        Upstream HTTP proxy used by the rogue WPAD Proxy for
                        outgoing requests (format: host:port)
  -F, --ForceWpadAuth   Force NTLM/Basic authentication on wpad.dat file
                        retrieval. This may cause a login prompt. Default:
                        False
  -P, --ProxyAuth       Force NTLM (transparently)/Basic (prompt)
                        authentication for the proxy. WPAD doesn't need to be
                        ON. This option is highly effective when combined with
                        -r. Default: False
  --lm                  Force LM hashing downgrade for Windows XP/2003 and
                        earlier. Default: False
  -v, --verbose         Increase verbosity.

The -A flag puts us into analyze mode, allowing us to see NBT-NS, BROWSER, and LLMNR requests in the environment without poisoning any responses. We must always supply either an interface or an IP.

Some common options we'll typically want to use are -wf; this will start the WPAD rogue proxy server, while -f will attempt to fingerprint the remote host operating system and version. We can use the -v flag for increased verbosity if we are running into issues, but this will lead to a lot of additional data printed to the console.

Other options such as -F and -P can be used to force NTLM or Basic authentication and force proxy authentication, but may cause a login prompt, so they should be used sparingly. The use of the -w flag utilizes the built-in WPAD proxy server. This can be highly effective, especially in large organizations, because it will capture all HTTP requests by any users that launch Internet Explorer if the browser has Auto-detect settings enabled.

Any of the rogue servers (i.e., SMB) can be disabled in the Responder.conf file.