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Responder/MultiRelay

IPv6/IPv4 LLMNR/NBT-NS/mDNS Poisoner and NTLMv1/2 Relay.

Author: Laurent Gaffie <laurent.gaffie@gmail.com > https://g-laurent.blogspot.com

Intro

Responder is an LLMNR, NBT-NS and MDNS poisoner.

Features

Supports NTLMv1, NTLMv2 hashes with Extended Security NTLMSSP by default. Successfully tested from Windows 95 to Server 2022, Samba and Mac OSX Lion. Clear text password is supported for NT4, and LM hashing downgrade when the --lm option is set. If --disable-ess is set, extended session security will be disabled for NTLMv1 authentication. SMBv2 has also been implemented and is supported by default.

This server supports NTLMv1, LMv2 hashes. This functionality was successfully tested on Windows SQL Server 2005, 2008, 2012, 2019.

This server supports NTLMv1, NTLMv2 hashes and Basic Authentication. This server was successfully tested on IE 6 to IE 11, Edge, Firefox, Chrome, Safari.

Note: This module also works for WebDav NTLM authentication issued from Windows WebDav clients (WebClient). You can now send your custom files to a victim.

Same as above. The folder certs/ contains 2 default keys, including a dummy private key. This is intentional, the purpose is to have Responder working out of the box. A script was added in case you need to generate your own self signed key pair.

This server supports NTLMSSP hashes and Simple Authentication (clear text authentication). This server was successfully tested on Windows Support tool "ldp" and LdapAdmin.

This server supports NTLMSSP hashes. This server was successfully tested on Windows XP to Server 2019.

This modules will collect clear text credentials.

This server will answer type SRV and A queries. This is really handy when it's combined with ARP spoofing.

This module will capture all HTTP requests from anyone launching Internet Explorer on the network if they have "Auto-detect settings" enabled. This module is highly effective. You can configure your custom PAC script in Responder.conf and inject HTML into the server's responses. See Responder.conf.

This module allows to find the PDC in stealth mode.

For MITM on Windows XP/2003 and earlier Domain members. This attack combined with the DNS module is pretty effective.

DHCP Inform Spoofing. Allows you to let the real DHCP Server issue IP addresses, and then send a DHCP Inform answer to set your IP address as a primary DNS server, and your own WPAD URL. To inject a DNS server, domain, route on all Windows version and any linux box, use -R

This module allows you to see NBT-NS, BROWSER, LLMNR, DNS requests on the network without poisoning any responses. Also, you can map domains, MSSQL servers, workstations passively, see if ICMP Redirects attacks are plausible on your subnet.

Hashes

All hashes are printed to stdout and dumped in a unique John Jumbo compliant file, using this format:

(MODULE_NAME)-(HASH_TYPE)-(CLIENT_IP).txt

Log files are located in the "logs/" folder. Hashes will be logged and printed only once per user per hash type, unless you are using the Verbose mode (-v).

Additionally, all captured hashed are logged into an SQLite database which you can configure in Responder.conf

Considerations

Edit this file /etc/NetworkManager/NetworkManager.conf and comment the line: dns=dnsmasq. Then kill dnsmasq with this command (as root): killall dnsmasq -9

Usage

First of all, please take a look at Responder.conf and tweak it for your needs.

Running the tool:

./Responder.py [options]

Typical Usage Example:

./Responder.py -I eth0 -Pv

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)
-6 2002:c0a8:f7:1:3ba8:aceb:b1a9:81ed, --externalip6=2002:c0a8:f7:1:3ba8:aceb:b1a9:81ed
                    Poison all requests with another IPv6 address than
                    Responder's one.
-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
-d, --DHCP            Enable answers for DHCP broadcast requests. This
                    option will inject a WPAD server in the DHCP response.
                    Default: False
-D, --DHCP-DNS        This option will inject a DNS server in the DHCP
                    response, otherwise a WPAD server will be added.
                    Default: False
-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. Default: False
--lm                  Force LM hashing downgrade for Windows XP/2003 and
                    earlier. Default: False
--disable-ess         Force ESS downgrade. Default: False
-v, --verbose         Increase verbosity.

Donation

You can contribute to this project by donating to the following $XLM (Stellar Lumens) address:

"GCGBMO772FRLU6V4NDUKIEXEFNVSP774H2TVYQ3WWHK4TEKYUUTLUKUH"

Paypal:

https://paypal.me/PythonResponder

Acknowledgments

Late Responder development has been possible because of the donations received from individuals and companies.

We would like to thanks those major sponsors:

Thank you.

Copyright

NBT-NS/LLMNR Responder

Responder, a network take-over set of tools created and maintained by Laurent Gaffie.

email: laurent.gaffie@gmail.com

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.