Whonix version 4.0.1-201811040215
user@host:~$ apt list | grep virtualbox
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
apparmor-profile-virtualbox/unknown 3:1.7-1 all
virtualbox-guest-dkms/unknown 5.2.18-dfsg-1~bpo9+1 all
virtualbox-guest-utils/unknown 5.2.18-dfsg-1~bpo9+1 amd64
virtualbox-guest-x11/unknown 5.2.18-dfsg-1~bpo9+1 amd64
user@host:~$