Kali Linux is an open-source Linux distribution, based on Raspberry Pi OS, and including all apps for penetration testing.
I recently installed it on my Raspberry Pi and I will give you some tips to do the same on your side. We’ll also test a few tools to learn more about this system.
Download the Kali Linux image from the official website.
Then, flash it on a SD card with Balena Etcher and start the Raspberry Pi.
In this article, I will explain in 15 steps how to get started with this hacking distribution on Raspberry Pi.
Feel free to use the table of contents below to go directly to what interests you the most.
By the way, if you are really interested in improving your skills on Raspberry Pi, I highly recommend to check out my e-book here. It’s a 30-days challenge from beginner to master, with step-by-step tutorials and many projects to practice along the way.
Kali Linux introduction
Kali Linux is a Debian-based Linux distribution, which includes security and penetration testing tools.
Formerly known as Backtrack, many security companies (and also hackers) use it.
Associated with Raspberry Pi, it turns it into a perfect hacking kit.
Kali Linux is available for the ARM architecture, so the installation is relatively simple. We will now see how to install it on your Raspberry Pi.
How to Install Kali Linux
Download Kali Linux images for Raspberry Pi
Kali Linux images for the ARM architecture are available on this page of the official website.
Click on the image name to download it directly, or click on “Torrent” to download the torrent file.
If you don’t know Torrent, it’s a peer-to-peer download protocol
You need to download and install a software to use it (Transmission, Vuze, Deluge, BitTorrent, …).
On Ubuntu, for example, Transmission is part of the basic packages already installed.
Create a new SD Card with Etcher
Now that you have the image of Kali Linux, we will create an SD card to install and use it later.
If possible, I recommend installing it on another SD card than the one you use for Raspberry Pi OS, so you don’t have to redo everything if you come back on Raspberry Pi OS (8Gb minimum).
If you need more SD cards, you can check my recommended products here.
As usual, we will use Etcher to create our SD card.
If you don’t have it yet you can download it from the official website, it’s available for Linux, Windows and macOS and will make your life easier.
Once Etcher installed, start it.
Then select your image and your SD card then start the copy.
I don’t know exactly why, but Kali Linux took me longer than other distributions to flash (even if the size is almost the same as Raspberry Pi OS Full), probably more compressed than Raspberry Pi OS.
First boot on Kali Linux
Just insert the SD card into your Raspberry Pi and start.
Kali Linux will start directly the login screen.
No questions or other, insert, start, wait.
There is nothing else to do 🙂
Open a session on Kali Linux
Once Kali started, you need to log in:
The default identifiers on Kali Linux are:
– login: kali
– password: kali
It is strongly recommended changing them quickly.
You can change it by opening a terminal and typing the command:
Kali Linux Configuration
You are now on the Kali Linux Desktop, and we can move to the configuration part.
If you don’t use a US keyboard, you can change the layout in the Settings, Keyboard options.
But be careful, on the login screen you will keep the US layout for the moment, so choose your password knowing this.
Connect to your Network
This part is only to use the network if there is a DHCP server on it.
If not, or if you need to set a static IP address, look at the following step.
Just connect the RJ45 cable to your Raspberry Pi and wait a few seconds for an IP address to be assigned to it, there is nothing else to do.
On the Kali desktop, click on the network icon at the top right, and choose the SSID of your Wi-Fi network.
Type the password of your access point, and wait a few moments.
Get your current IP address:
Whatever your connection mode, you can retrieve the IP address obtained with the ifconfig command:
sudo ifconfigThe addresses are indicated on the second line of each interface, after the keyword “inet”.
eth0 = Ethernet, wlan0 = Wi-Fi
I recommend not to activate both simultaneously, even if it seems to work.
I had problems of response time by moments. Probably a problem of routing (I didn’t take any longer to look at this, but by disabling the Wi-Fi it fixed the problem).
Set a static IP address
A static IP address will allow you to choose the IP address associated with your Raspberry Pi, and therefore find it more easily later:
- Open a terminal or connect with SSH
- To set a static IP open the /etc/network/interfaces file:
sudo nano /etc/network/interfaces
- You will see something like this
iface eth0 inet dhcp
- Replace it with something like this:
iface eth0 inet static
Replace the IPs indicated by what fits your network
- Reboot your Raspberry Pi or unplug/plug the network cable to update your IP
You can do the same thing for your Wi-Fi connection by replacing eth0 with wlan0.
As for any fresh new installation, a good practice is to update your system :
sudo apt update
sudo apt upgrade
Enable SSH and VNC
Now that we have a fixed IP address, it’s time to make our Raspberry Pi accessible from another network computer.
In theory, SSH is installed and enabled by default.
If you don’t have access, it’s probably because you need to start the service:
service ssh start
If you need help with SSH, look at this tutorial here.
VNC will allow you to have access to a remote desktop on your Raspberry Pi.
On the latest Kali Linux versions, TightVNC is already installed
You just need to set a password:
- Open a terminal or connect via SSH
- Use this command to define your password:
- Once done, this will also start the service
You can now connect to your Raspberry Pi on Kali Linux with any VNC Viewer.
For example, on Ubuntu :
sudo apt install xtightvncviewer
On Windows, you can download TightVNC here.
Remember that VNC is not a secure protocol, and if you use it at home it’s ok, but in a more extensive network it is better to use it through an SSH tunnel for example.
You can find more details about remote desktop on Raspberry Pi in my tutorial linked here. It’s for Raspberry Pi OS, but it’s very similar.
Kali Linux tools
Ok, you are now ready to try the Kali Linux tools available directly after the installation.
There are so many apps available that it can quickly become overwhelming.
That’s why I’ll show you a few ones here, that you can easily try.
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Change your MAC Address
A MAC address is a unique identifier for each network adapter. It depends on each manufacturer, and it’s often used to give access to a specific part of the network to restricted computers. A DHCP server can also assign always the same IP to a MAC Address.
For example, you can configure your Wi-Fi network to whitelist your MAC address, and prevent anyone else from connecting to it. I have a detailed article here on how to find the MAC address of your Raspberry Pi.
MacChanger is a tool which allows you to do MAC address spoofing, i.e. to pretend to be someone else.
Install it if needed:
sudo apt install macchanger
See your current MAC Address:
- Disable your network card:
- Get a random MAC address:
macchanger -r eth0
- Set a specific MAC address:
macchanger -m XX:XX:XX:XX:XX:XX eth0
- Reboot to reset and get the standard MAC Address
Hack Wi-Fi password
AirCrack-NG is one of the most popular tools on Kali Linux.
It’s a complete suite of tools to test the wireless security of a network.
It provides tools for monitoring, attacking, testing and cracking Wi-Fi networks.
You need to disconnect the Wi-Fi on your Raspberry Pi before starting:
- Then check that your network card is compatible (it is):
- Start monitoring:
sudo airmon-ng start wlan0
- Show wireless network available:
sudo airodump-ng wlan0mon
And you are ready to go!
You can read this post to get more details on how to do this.
Brute force with Hydra
Brute force is a password cracking method, that try passwords from a dictionary or other, and try all the possibilities until it works.
Hydra is a tool to make very fast brute force from a Kali Linux software and which supports many protocols.
First, you will need a list of passwords and put it in a file, like /root/passwords.txt (one per line).
You can find most common passwords on the Internet, or generate your own
For the test, just put a few random passwords manually in the file.
Then you can try it, for example, I have decided to brute force SSH on my computer from the Raspberry Pi:
hydra -l root -P /root/passwords.txt -t 6 ssh://192.168.222.51
If I check in my /var/log/auth.log, I can see tries from the Raspberry :
May 22 15:55:37 ubuntu sshd: Failed password for root from 192.168.222.31 port 37226 ssh2 May 22 15:55:37 ubuntu sshd: Failed password for root from 192.168.222.31 port 37234 ssh2 May 22 15:55:39 ubuntu sshd: Failed password for root from 192.168.222.31 port 37228 ssh2 May 22 15:55:39 ubuntu sshd: Failed password for root from 192.168.222.31 port 37232 ssh2
A packet analyzer (or sniffer) is a tool that can intercept traffic from the network and capture it to analyze it.
On Kali Linux, you can use Wireshark, which is the most used tool to analyze network traffic.
It’s a graphical tool, but you can capture packets with tcpdump or something else, and then open it with Wireshark.
You can find the app in the Applications menu, under Sniffing and spoofing:
- Start it and then go to Capture > Start
- You will now see all packets from the network
- Click Stop when you want
Then there are many features that you can use to filter or analyze what you have captured:
SQL injection is a technique to attack insecure applications, including injecting code into user fields that are not protected.
This technique is mainly used to attack websites.
For example, if you replace a parameter of the URL, say ?user=yourname by something like ?user=yourname ‘ OR 1
If the field is poorly protected, the SQL query will be modified and will return all the data, not just those of your user.
On Kali Linux, the sqlmap tool allows testing SQL injection vulnerabilities.
Sqlmap is a straightforward tool to use.
You only need to put the URL of the page to test, something like this:
sqlmap -u https://www.domain.com/?p=123
Once you have found a security hole, it is possible to dig deeper with this tool to see what you can get. But the best thing to do is to fix it 🙂
Metasploit is a tool that will allow you to validate vulnerabilities and use them.
Metasploit allows you to automate the process of discovery and exploitation and provides you with the tools required to perform the manual testing phase of a penetration test.
You can start it in Applications > Exploitation Tools > Metasploit framework.
This tool will initialize and start a terminal that will allow you to use it.
For example, you can use nmap in the framework:
db_nmap -v -sV 192.168.222.51
You can also retrieve information about a known vulnerability, and try to use it:
Replace the search parameter with your vulnerability ID and use the exploit path displayed in the search results.
If you are interested, find a good tutorial on the topic, it’s not possible to explain everything in a few lines.
If you want a visual explanation, you can watch this video on how to install Kali Linux on your Raspberry Pi:
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We learned how to install Kali Linux on Raspberry Pi, the first steps of the system configuration, and some exciting tools to use on this distribution.
As I said at the beginning, this article is not exhaustive. There are hundreds of apps and most are quite complicated to take in hand which would require an article each, but it was not the goal here.
I still hope you understand the basics and that this article made you want to try 🙂
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