dpkg -l | grep -i virtualbox
ii  virtualbox-guest-dkms                       4.3.34-dfsg-1+deb8u1ubuntu1.14.04.1     all          x86 virtualization solution - guest addition module source for dkms
ii  virtualbox-guest-utils                      4.3.34-dfsg-1+deb8u1ubuntu1.14.04.1     amd64        x86 virtualization solution - non-X11 guest utilities
ii  virtualbox-guest-x11                        4.3.34-dfsg-1+deb8u1ubuntu1.14.04.1     amd64        x86 virtualization solution - X11 guest utilities