DNS POISONING USING CAIN

DNS POISONING USING CAIN

Note: This Tutorial is for educational purposes only (you’ll be responsible for your own actions)
DOWNLOAD CAIN: LINK

First What is the DNS ?: Wikipedia 

The Domain Name System (DNS) is a hierarchical naming system for

computers, services, or any resource connected to the internet or a

private network. It associates various information with domain names

assigned to each of the participants. Most importantly, it translates

domain names meaningful to humans into the numerical (binary)

identifiers associated with networking equipment for the purpose of

locating and addressing these devices worldwide. An often used analogy

to explain the Domain Name System is that it serves as the "phone book"

for the Internet by translating human-friendly computer hostnames into

IP addresses. For example, http://www.example.com translates to 208.77.188.166.

What does poisoning the DNS allow us to do ?

It allows us to redirect the traffic to another website.

First This is the structure of the network :http://farm5.static.flickr.com/4044/4337060175_5b99b48ac0.jpg (EXAMPLE ONLY)

1 , 2 and 3 are computers

1 is the computer being the gateway (could be a router) (172.128.254.1)

2 is the target computer (172.128.254.10)

3 is the attacker using cain

Note : IPs are just used for this tutorial and chosen randomly.

Our work is on computer number 3.

1-After you install cain , open it and go to the sniffer tab

2-Click on configure and choose your adapterDemo :http://farm5.static.flickr.com/4032/4336895163_134d4202fd.jpg

3-Enable the sniffer (click on the second icon in the toolbar next to the open icon)

4-Right click in the empty area and choose scan MAC addresses. We get the results above.

5-Click on the APR Tab

Demo : http://farm3.static.flickr.com/2725/4337645862_9e847b91e4.jpg

6-Click on the + sign in the toolbar to add a new ARP poison routing.

demo : http://farm5.static.flickr.com/4062/4337656172_57b3d5b3b5.jpg

7-choose the gateway which is 172.128.254.1 , in the next list you’ll

get the IP of the computer 2 which is 172.128.254.10 and click ok.

demo : http://farm5.static.flickr.com/4009/4337049117_87315e8629.jpg

8-now click on the APR-DNS tab

demo: http://farm5.static.flickr.com/4029/4337796362_14af553609.jpg

9-click on the + sign

10-enter the web address that you want to spoof , (in this case when the

user goes to facebook he’ll be redirected to myspace) click on resolve

type the web address that you want to redirect the user to it, and click

ok, and you’ll get the IP of the web address, then click ok.

demo : http://farm3.static.flickr.com/2731/4337798910_e83774f149.jpg

you'll get something like this:http://farm5.static.flickr.com/4003/4337057395_171642d13d.jpg

11-now to make this work we have to enable APR poisoning , click on the

icon next to the sniffer icon, and everything should work as we expect.

Now the computer 2 will get the routes poisoned and when the user requestshttp://www.facebook.com he will be redirected to http://www.myspace.com .(you can change myspace.com to ur phishing website)

Imagine what you can do with this technique.