Regrettably I can't seem to get some functionality working in my virtualbox.
Apparently my vbox guest additions installation does work with scaling to full screen but other then that I can't get my clipboard to work or even shared folders including drag and drop.
When running uname -r I see my latest kernel 3.18.0-kali3-amd64 being installed so this shouldn't be the issue.
My /var/log/vboxadd-install.log is in the attachment.
Does anyone have an idea on why this problem persists?