vagrant-vbguest
vagrant-vbguest is a Vagrant plugin which automatically installs the host’s VirtualBox Guest Additions on the guest system.
Installation
Requires vagrant 0.9.4 or later (including 1.x)
Vagrant ≥ 1.1
$ vagrant plugin install vagrant-vbguest
from https://github.com/dotless-de/vagrant-vbguest