ETTERCAP-PLUGINS(8)ETTERCAP-PLUGINS(8)NAME
ettercap-plugins - A collection of plugins for ettercap
DESCRIPTIONEttercap(8) supports loadable modules at runtime. They are called plug‐
ins and they come within the source tarball. They are automatically
compiled if your system supports them or until you specify -DEN‐
ABLE_PLUGINS=OFF option to the cmake configure script.
Some of older ettercap plugins (roper, banshee, and so on) have not
been ported in the new version. By the way, you can achieve the same
results by using new filtering engine.
If you use interactive mode, most plugins need to "Start Sniff" before
using them.
To have a list of plugins installed in your system do that command:
ettercap -P list
The following is a list of available plugins:
arp_cop
It reports suspicious ARP activity by passively monitoring ARP
requests/replies. It can report ARP posioning attempts, or sim‐
ple IP-conflicts or IP-changes. If you build the initial host
list the plugin will run more accurately.
example :
ettercap -TQP arp_cop //
autoadd
It will automatically add new victims to the ARP poisoning mitm
attack when they come up. It looks for ARP requests on the lan
and when detected it will add the host to the victims list if it
was specified in the TARGET. The host is added when an arp
request is seen form it, since communicating hosts are alive :)
chk_poison
It performs a check to see if the arp poisoning module of etter‐
cap was successful. It sends spoofed ICMP echo packets to all
the victims of the poisoning pretending to be each of the other
targets. If we can catch an ICMP reply with our MAC address as
destination it means that the poisoning between those two tar‐
gets is successful. It checks both ways of each communication.
This plugin makes sense only where poisoning makes sense. The
test fails if you specify only one target in silent mode. You
can't run this plugin from command line because the poisoning
process is not started yet. You have to launch it from the
proper menu.
dns_spoof
This plugin intercepts DNS query and reply with a spoofed
answer. You can chose to which address the plugin has to reply
by modifying the etter.dns file. The plugin intercepts A, AAAA,
PTR, MX, WINS, SRV and TXT request. If it was an A request, the
name is searched in the file and the IP address is returned (you
can use wildcards in the name).
The same applies if it was a AAAA request.
If it was a PTR request, the IP address is searched in the file
and the name is returned (except for those name containing a
wildcard). For PTR requests, IPv4 or IPv6 addresses are sup‐
ported.
In case of MX request a special reply is crafted. The host is
resolved with a fake host 'mail.host' and the additional record
contains the IP address of 'mail.host'. The first address that
matches is returned, so be careful with the order. The IP
address for MX requests can be a IPv4 or a IPv6 address.
If the request was a WINS request, the name is searched in the
file and the IP address is returned.
In case of SRV request, a special reply is crafted. The host is
resolved with a fake host 'srv.host' and the additional record
contains the IP address of 'srv.host'. The IP address for SRV
requests can be a IPv4 or a IPv6 address.
In case of a TXT request, the string defined is being returned.
The string has to be wrapped in double quotes. Wildcards for the
requested name can also be used.
A special reply can be spoofed for A or AAAA requests, if the
'undefined address' is specified as the IP address in the file.
Then the client gets a response which stops resolution process‐
ing imediately. This way one can control which address family is
being used to access a dual-stacked host.
In the case of an ANY request, all matching results of type A,
AAAA, MX and TXT are returned in the reply. If the 'undefined
address' for A or AAAA records is defined, nothing is returned
for these types whether or not the name matches.
mdns_spoof
This plugin does the same as the dns_spoof plugin described
above, despite that it listens for mDNS (Multicast DNS) queries
on UDP port 5353. To choose to which address the plugin shall
reply, you have to modify a diffent file called etter.mdns. Due
to the nature of mDNS, the plugin intercepts only A, AAAA, PTR
and SRV requests.
The way the mdns_spoof plugin interprets the etter.mdns file and
the rules that apply are the same as with the dns_spoof plugin.
dos_attack
This plugin runs a d.o.s. attack against a victim IP address. It
first "scans" the victim to find open ports, then starts to
flood these ports with SYN packets, using a "phantom" address as
source IP. Then it uses fake ARP replies to intercept packets
for the phantom host. When it receives SYN-ACK from the victim,
it replies with an ACK packet creating an ESTABLISHED connec‐
tion. You have to use a free IP address in your subnet to cre‐
ate the "phantom" host (you can use find_ip for this purpose).
You can't run this plugin in unoffensive mode.
This plugin is based on the original Naptha DoS attack
(http://razor.bindview.com/publish/advisories/adv_NAPTHA.html)
example :
ettercap -TQP dos_attack
dummy
Only a template to demonstrate how to write a plugin.
find_conn
Very simple plugin that listens for ARP requests to show you all
the targets an host wants to talk to. It can also help you find‐
ing addresses in an unknown LAN.
example :
ettercap -TQzP find_conn
ettercap -TQu -i eth0 -P find_conn
find_ettercap
Try to identify ettercap packets sent on the LAN. It could be
useful to detect if someone is using ettercap. Do not rely on it
100% since the tests are only on particular sequence/identifica‐
tion numbers.
find_ip
Find the first unused IP address in the range specified by the
user in the target list. Some other plugins (such as gre_relay)
need an unused IP address of the LAN to create a "fake" host.
It can also be useful to obtain an IP address in an unknown LAN
where there is no dhcp server. You can use find_conn to deter‐
mine the IP addressing of the LAN, and then find_ip. You have
to build host list to use this plugin so you can't use it in
unoffensive mode. If you don't have an IP address for your
interface, give it a bogus one (e.g. if the LAN is
192.168.0.0/24, use 10.0.0.1 to avoid conflicting IP), then
launch this plugin specifying the subnet range. You can run it
either from the command line or from the proper menu.
example :
ettercap -TQP find_ip //
ettercap -TQP find_ip /192.168.0.1-254/
finger
Uses the passive fingerprint capabilities to fingerprint a
remote host. It does a connect() to the remote host to force the
kernel to reply to the SYN with a SYN+ACK packet. The reply will
be collected and the fingerprint is displayed. The connect()
obey to the connect_timeout parameter in etter.conf(5). You can
specify a target on command-line or let the plugin ask the tar‐
get host to be fingerprinted. You can also specify multiple tar‐
get with the usual multi-target specification (see ettercap(8)).
if you specify multiple ports, all the ports will be tested on
all the IPs.
example :
ettercap -TzP finger /192.168.0.1/22
ettercap -TzP finger /192.168.0.1-50/22,23,25
finger_submit
Use this plugin to submit a fingerprint to the ettercap website.
If you found an unknown fingerprint, but you know for sure the
operating system of the target, you can submit it so it will be
inserted in the database in the next ettercap release. We need
your help to increase the passive fingerprint database. Thank
you very much.
example :
ettercap -TzP finger_submit
fraggle_attack
This plugin performs a DoS attack because it sends a large
amount of UDP echo and chargen traffic to all hosts in target2
with a fake source ip address (victim).
example (192.168.0.5 is the victim):
ettercap -i eth1 -Tq /192.168.0.5/ // -P fraggle_attack
gre_relay
This plugin can be used to sniff GRE-redirected remote traffic.
The basic idea is to create a GRE tunnel that sends all the
traffic on a router interface to the ettercap machine. The plug‐
in will send back the GRE packets to the router, after ettercap
"manipulation" (you can use "active" plugins such as smb_down,
ssh decryption, filters, etc... on redirected traffic) It needs
a "fake" host where the traffic has to be redirected to (to
avoid kernel's responses). The "fake" IP will be the tunnel end‐
point. Gre_relay plugin will impersonate the "fake" host. To
find an unused IP address for the "fake" host you can use
find_ip plugin. Based on the original Tunnelx technique by
Anthony C. Zboralski.
gw_discover
This plugin try to discover the gateway of the lan by sending
TCP SYN packets to a remote host. The packet has the destination
IP of a remote host and the destination mac address of a local
host. If ettercap receives the SYN+ACK packet, the host which
own the source mac address of the reply is the gatway. This
operation is repeated for each host in the 'host list', so you
need to have a valid host list before launching this plugin.
example :
ettercap -TP gw_discover /192.168.0.1-50/
isolate
The isolate plugin will isolate an host form the LAN. It will
poison the victim's arp cache with its own mac address associ‐
ated with all the host it tries to contact. This way the host
will not be able to contact other hosts because the packet will
never reach the wire.
You can specify all the host or only a group. the targets speci‐
fication work this way: the target1 is the victim and must be a
single host, the target2 can be a range of addresses and repre‐
sent the hosts that will be blocked to the victim.
examples :
ettercap -TzqP isolate /192.168.0.1/ //
ettercap -TP isolate /192.168.0.1/ /192.168.0.2-30/
link_type
It performs a check of the link type (hub or switch) by sending
a spoofed ARP request and listening for replies. It needs at
least one entry in the host list to perform the check. With two
or more hosts the test will be more accurate.
example :
ettercap -TQP link_type /192.168.0.1/
ettercap -TQP link_type //
pptp_chapms1
It forces the pptp tunnel to negotiate MS-CHAPv1 authentication
instead of MS-CHAPv2, that is usually easier to crack (for exam‐
ple with LC4). You have to be in the "middle" of the connection
to use it successfully. It hooks the ppp dissector, so you have
to keep them active.
pptp_clear
Forces no compression/encryption for pptp tunnels during negoti‐
ation. It could fail if client (or the server) is configured to
hang off the tunnel if no encryption is negotiated. You have to
be in the "middle" of the connection to use it successfully. It
hooks the ppp dissector, so you have to keep them active.
pptp_pap
It forces the pptp tunnel to negotiate PAP (cleartext) authenti‐
cation. It could fail if PAP is not supported, if pap_secret
file is missing, or in case windows is configured with
"authomatic use of domain account". (It could fail for many
other reasons too). You have to be in the "middle" of the con‐
nection to use it successfully. It hooks the ppp dissector, so
you have to keep them active.
pptp_reneg
Forces re-negotiation on an existing pptp tunnel. You can force
re-negotiation for grabbing passwords already sent. Furthermore
you can launch it to use pptp_pap, pptp_chapms1 or pptp_clear on
existing tunnels (those plugins work only during negotiation
phase). You have to be in the "middle" of the connection to use
it successfully. It hooks the ppp dissector, so you have to
keep them active.
rand_flood
Floods the LAN with random MAC addresses. Some switches will
fail open in repeating mode, facilitating sniffing. The delay
between each packet is based on the port_steal_send_delay value
in etter.conf.
It is useful only on ethernet switches.
example :
ettercap -TP rand_flood
remote_browser
It sends to the browser the URLs sniffed thru HTTP sessions. So
you are able to see the webpages in real time. The command exe‐
cuted is configurable in the etter.conf(5) file. It sends to the
browser only the GET requests and only for webpages, ignoring
single request to images or other amenities. Don't use it to
view your own connection :)
reply_arp
Simple arp responder. When it intercepts an arp request for a
host in the targets' lists, it replies with attacker's MAC
address.
example :
ettercap -TQzP reply_arp /192.168.0.1/
ettercap -TQzP reply_arp //
repoison_arp
It solicits poisoning packets after broadcast ARP requests (or
replies) from a posioned host. For example: we are poisoning
Group1 impersonating Host2. If Host2 makes a broadcast ARP
request for Host3, it is possible that Group1 caches the right
MAC address for Host2 contained in the ARP packet. This plugin
re-poisons Group1 cache immediately after a legal broadcast ARP
request (or reply).
This plugin is effective only during an arp-posioning session.
In conjunction with the reply_arp plugin, repoison_arp is a good
support for the standard arp-poisoning mitm method.
example :
ettercap -T-M arp:remote -P repoison_arp /192.168.0.10-20/
/192.168.0.1/
scan_poisoner
Check if someone is poisoning between some host in the list and
us. First of all it checks if two hosts in the list have the
same mac address. It could mean that one of those is poisoning
us pretending to be the other. It could generate many false-
positives in a proxy-arp environment. You have to build hosts
list to perform this check. After that, it sends icmp echo
packets to each host in the list and checks if the source mac
address of the reply differs from the address we have stored in
the list for that ip. It could mean that someone is poisoning
that host pretending to have our ip address and forwards inter‐
cepted packets to us. You can't perform this active test in
unoffensive mode.
example :
ettercap -TQP scan_poisoner //
search_promisc
It tries to find if anyone is sniffing in promisc mode. It sends
two different kinds of malformed arp request to each target in
the host list and waits for replies. If a reply arrives from the
target host, it's more or less probable that this target has the
NIC in promisc mode. It could generate false-positives. You can
launch it either from the command line or from the plugin menu.
Since it listens for arp replies it is better that you don't use
it while sending arp request.
example :
ettercap -TQP search_promisc /192.168.0.1/
ettercap -TQP search_promisc //
smb_clear
It forces the client to send smb password in clear-text by man‐
gling protocol negotiation. You have to be in the "middle" of
the connection to successfully use it. It hooks the smb dissec‐
tor, so you have to keep it active. If you use it against a
windows client it will probably result in a failure. Try it
against a *nix smbclient :)
smb_down
It forces the client to not to use NTLM2 password exchange dur‐
ing smb authentication. This way, obtained hashes can be easily
cracked by LC4. You have to be in the "middle" of the connec‐
tion to successfully use it. It hooks the smb dissector, so you
have to keep it active.
smurf_attack
The Smurf Attack is a DoS attack in which huge numbers of ICMP
packets with the intended victim(s)IP(s) in target1 are sent to
the hosts in target2. This causes all hosts on the target2 to
reply to the ICMP request, causing significant traffic to the
victim's computer(s).
example (192.168.0.5 is the victim):
ettercap -i eth1 -Tq /192.168.0.5/ // -P fraggle_attack
sslstrip
While performing the SSL mitm attack, ettercap substitutes the
real ssl certificate with its own. The fake certificate is cre‐
ated on the fly and all the fields are filled according to the
real cert presented by the server. Only the issuer is modified
and signed with the private key contained in the 'etter.ssl.crt'
file. If you want to use a different private key you have to
regenerate this file. To regenerate the cert file use the fol‐
lowing commands:
openssl genrsa -out etter.ssl.crt 1024
openssl req -new -key etter.ssl.crt -out tmp.csr
openssl x509 -req -days 1825 -in tmp.csr -signkey etter.ssl.crt
-out tmp.new
cat tmp.new >> etter.ssl.crt
rm -f tmp.new tmp.csr
NOTE: SSL mitm is not available (for now) in bridged mode.
NOTE: You can use the --certificate/--private-key long options
if you want to specify a different file rather than the
etter.ssl.crt file.
stp_mangler
It sends spanning tree BPDUs pretending to be a switch with the
highest priority. Once in the "root" of the spanning tree,
ettercap can receive all the "unmanaged" network traffic.
It is useful only against a group of switches running STP.
If there is another switch with the highest priority, try to
manually decrease your MAC address before running it.
example :
ettercap -TP stp_mangler
ORIGINAL AUTHORS
Alberto Ornaghi (ALoR) <alor@users.sf.net>
Marco Valleri (NaGA) <naga@antifork.org>
PROJECT STEWARDS
Emilio Escobar (exfil) <eescobar@gmail.com>
Eric Milam (Brav0Hax) <jbrav.hax@gmail.com>
OFFICIAL DEVELOPERS
Mike Ryan (justfalter) <falter@gmail.com>
Gianfranco Costamagna (LocutusOfBorg) <costamagnagianfranco@yahoo.it>
Antonio Collarino (sniper) <anto.collarino@gmail.com>
Ryan Linn <sussuro@happypacket.net>
Jacob Baines <baines.jacob@gmail.com>
CONTRIBUTORS
Dhiru Kholia (kholia) <dhiru@openwall.com>
Alexander Koeppe (koeppea) <format_c@online.de>
Martin Bos (PureHate) <purehate@backtrack.com>
Enrique Sanchez
Gisle Vanem <giva@bgnett.no>
Johannes Bauer <JohannesBauer@gmx.de>
Daten (Bryan Schneiders) <daten@dnetc.org>
SEE ALSOettercap(8)ettercap_curses(8)etterlog(8)etterfilter(8)etter.conf(5)ettercap-pkexec(8)ettercap 0.8.2ETTERCAP-PLUGINS(8)
