Installing Kali Linux VirtualBox Guest Additions, If you run Kali Linux as a “guest” within VirtualBox, this article will help you to successfully install the “Guest Addition” tools.
You must use version 4.2.xx or higher of VirtualBox in order to take advantage of the improvements, including compatibility updates, and enhanced stability of both the core application and the Guest Additions.
Installing Kali Linux VirtualBox Guest Additions
The VirtualBox Guest Additions provide proper mouse and screen integration, as well as folder sharing, with your host operating system. To install them, proceed as follows.
Start up your Kali Linux virtual machine, open a terminal window and issue the following commands.
apt-get install -y virtualbox-guest-x11
Credit: Kali Linux Virtual Box Guest