complete info Man in the Middle Attack (MITM)

Man-in-the-Middle Tutorial: Learn About Man-in-the-Middle Attacks, Vulnerabilities and How to Prevent MITM Attacks


Definition - What does Man-in-the-Middle Attack (MITM) mean?

A man-in-the-middle (MITM) attack is a form of eavesdropping where communication between two users is monitored and modified by an unauthorized party. Generally, the attacker actively eavesdrops by intercepting a public key message exchange and retransmits the message while replacing the requested key with his own.

complete info about cookie And session hijacking In the process, the two original parties appear to communicate normally. The message sender does not recognize that the receiver is an unknown attacker trying to access or modify the message before retransmitting to the receiver. Thus, the attacker controls the entire communication.
This term is also known as a janus attack or a fire brigade attack.  

The Art of Sniffing
Before we embark on a MitM attack, we need to address a few concepts. First, sniffing is the act of grabbing all of the traffic that passes you over the wired or wireless communication. There are a number of tools that will enable you to do this. Most famously, Wireshark, but also tcpdump, dsniff, and a handful of others.

Enter Promiscuous Mode
In order to see and grab traffic other than your own, you need to first put your NIC or wireless adapter into promiscuous mode (called monitor mode in wireless), meaning that it will pick up ALL traffic, not just that intended for your MAC/IP address. In wireless and wired networks with hubs, this can be accomplished relatively easily. In a switched environment, we need to be a bit more creative.

Switches & Spoofing

Switches are designed to reduce network traffic and congestion by isolating traffic and only sending packets to a particular IP address or MAC address that's the destination, unlike hubs that send all traffic to all NICs. This means that my NIC only sees traffic intended for it, if the switch is doing its job. This makes it harder, but not impossible to sniff and thereby conduct a MiTM attack.
linux basics & Hacking Linux Systems To defeat the switches task of isolating network traffic, a number of strategies have been attempted. On older switches, you could flood them with ARPs and the switch would flood and fail open. These means that it would begin to act like a hub, sending all the traffic to all the NICs, enabling the hacker to sniff other people's traffic.
This strategy no longer works on modern switches and even on the older ones, a vigilant network admin is going to notice the change in network traffic and volume.
In order for switches to "know" where to send traffic, they maintain a CAM table that essentially maps IP addresses to MAC addresses. This table says that when traffic is intended for IP address 192.168.1.101, for instance, send that traffic to MAC address 11:22:33:44:EE:FF (example MAC address).
If we can change the entries in that table, we can successfully get someone else's traffic. This is called ARP spoofing, because the entries in the CAM table come from ARPs that are sent out by the switch to gather this information from the NIC.

ARP Spoofing for a MitM Attack

What we will be doing here, is using ARP spoofing to place ourselves between two machines making the client believe we are the server and the server believe we are the client. With this, we can then send all the traffic through our computer and sniff every packet that goes in either direction.

Kali Linux Man in the Middle Attack

How to perform man in the middle attack using Kali Linux?we will learn the step by step process how to do this.
I believe most of you already know and learn about the concept what is man in the middle attack, but if you still don't know about this, you can read above or  here is some definition from wikipedia. 

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Scenario:
This is the simple scenario, and I try to draw it in a picture

Victim IP address : 192.158.8.9

Attacker network interface : eth0; with IP address : 192.158.8.99

Router IP address : 192.178.3.5

Requirements:

1. Arpspoof

2. Driftnet

3. Urlsnarf

Step by step Kali Linux Man in the Middle Attack :

1. Open your terminal (CTRL + ALT + T kali shortcut) and configure our Kali Linux machine to allow packet forwarding, because act as man in the middle attacker, Kali Linux must act as router between "real router" and the victim. Read the tutorial here how to set up packet forwarding in linux.

2. You can change your terminal interface to make the view much more friendly and easy to monitor by splitting kali linux terminal window.

3. The next step is setting up arpspoof between victim and router.

arpspoof -i eth0 -t 192.158.8.9   192.178.3.5

4. And then setting up arpspoof from to capture all packet from router to victim.

arpspoof -i eth0 192.178.3.5  192.158.8.9  

5. After step three and four, now all the packet sent or received by victim should be going through attacker machine.

6. Now we can try to use driftnet to monitor all victim image traffic. According to its website,

7. To run driftnet, we just run this

To stop driftnet, just close the driftnet window or press CTRL + C in the terminal

8. For the next step we will try to capture the website information/data by using urlsnarf. To use urlsnarf, just run this code

urlsnarf -i eth0

and urlsnarf will start capturing all website address visited by victim machine.

9. When victim browse a website, attacker will know the address victim visited.

Here is the video in case you can't get the text explanations above. - See more at: 

THis whole Article is only for education purpose what ever you done on your own risk thank you for coming here . If any question or any help comment bellow .