Building Custom Kali ISOs
One of the most powerful features of Kali Linux is the ability to create your own flavors of the distribution containing customized tools, desktop managers, and services. This workshop will show you how to create your own personalized Kali Linux ISO, customizing virtually every aspect using the live-build utility and making efficient use of the various meta-packages available in Kali.
The Awesomeness of Live Build
0x00 – Begin by updating the repos, installing the prerequisites, and checking out a fresh version of live-build-config from the Kali Git repositories:
apt install git live-build cdebootstrap devscripts -y
git clone git://gitlab.com/kalilinux/build-scripts/live-build-config.git
0x01 – Overwrite the default Kali package list, including only the packages you want. In the video, we simply edited the list and changed a few package names.
0x02 – Add a customised syslinux boot entry which includes a boot parameter for a custom preseed file.
menu label ^Install Automated
append vga=788 -- quiet file=/cdrom/install/preseed.cfg locale=en_US keymap=us hostname=kali domain=local.lan
0x03 – Customise the ISO build. In this example, we’ll have the SSH service start by default. To do this, we can use a chroot hook script which is placed in the “hooks” directory:
chmod +x kali-config/common/hooks/01-start-ssh.chroot
0x04 – Next, we download a wallpaper and overlay it. Notice how chroot overlayed files are placed in the includes.chroot directory.
mv wp-blue.png kali-config/common/includes.chroot/usr/share/wallpapers/kali/contents/images
0x05 – Add a preseed file that will run through a default Kali installation with no input (unattended). We can include a ready made preseed configuration and alter it as needed:
wget https://raw.githubusercontent.com/offensive-security/kali-linux-preseed/master/kali-linux-full-unattended.preseed -O kali-config/common/debian-installer/preseed.cfg
0x06 – Let’s include a Nessus Debian package into the packages directory for inclusion into our final build. Since we used a 64 bit build, we’re including a 64 bit Nessus Debian package. Download the Nessus .deb file and place it in the packages.chroot directory:
mv Nessus-*amd64.deb kali-config/common/packages.chroot/
0x07 – Now you can proceed to build your ISO, this process may take a while depending on your hardware and internet speeds. Once completed, your ISO can be found in the live-build root directory.
For more live-build implementations, refer to the following: