Originally Posted by
IsayWhaat
I managed to fix the problem, but I had to re-install the Kali completely.
So, after fixing repositories and network manager, I tried different approach.
apt-get install linux-headers-$(uname -r)
Then I went and mounted, Devices - Insert Guest Additions CD Image, but canceled it.
cd /media/cdrom
ls
cp VBoxLinuxAdditions.run /root/Desktop
cd /root/Desktop
chmod 777 VBoxLinuxAdditions.run
./VBoxLinuxAdditions.run
reboot
and it worked. Just in case someone else gets the problem. This can go to SOLVED. Thank you.