[rdanilov@rd-vm025 ~]$ uname -a                                                                                                      
FreeBSD rd-vm025 11.2-RELEASE-p4 FreeBSD 11.2-RELEASE-p4 #0: Thu Sep 27 08:16:24 UTC 2018     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64                                                                                                      
[rdanilov@rd-vm025 ~]$ sysctl -n hw.hv_vendor                                                                                   
                                                                                                                                     
[rdanilov@rd-vm025 ~]$ sysctl -n kern.vm_guest                                                                     
generic                                                                                                                              
[rdanilov@rd-vm025 ~]$ pkg search virtualbox                                                                                         
phpvirtualbox-5.2.0_1          AJAX Web Interface for VirtualBox                                                                     
virtualbox-ose-5.2.12_1        General-purpose full virtualizer for x86 hardware                                                     
virtualbox-ose-additions-5.2.12 VirtualBox additions for FreeBSD guests                                                              
virtualbox-ose-additions-nox11-5.2.12_1 VirtualBox additions for FreeBSD guests                                                      
virtualbox-ose-kmod-5.2.12     VirtualBox kernel module for FreeBSD                                                                  
virtualbox-ose-nox11-5.2.12_1  General-purpose full virtualizer for x86 hardware                                                     
[rdanilov@rd-vm025 ~]$ pkg info virtualbox-ose-additions-nox11-5.2.12_1
virtualbox-ose-additions-nox11-5.2.12_1                                                                                              
Name           : virtualbox-ose-additions-nox11                                                                                      
Version        : 5.2.12_1                                                                                                            
Installed on   : Wed Sep 26 15:32:43 2018 MSK                                                                                        
Origin         : emulators/virtualbox-ose-additions-nox11                                                                            
Architecture   : FreeBSD:11:amd64                                                                                                    
Prefix         : /usr/local                                                                                                          
Categories     : emulators kld                                                                                                       
Licenses       : GPLv2                                                                                                               
Maintainer     : vbox@FreeBSD.org                                                                                                    
WWW            : http://www.virtualbox.org/                                                                                          
Comment        : VirtualBox additions for FreeBSD guests                                                                             
Options        :                                                                                                                     
        DBUS           : on                                                                                                          
Annotations    :                                                                                                                     
        FreeBSD_version: 1101001                                                                                                     
        cpe            : cpe:2.3:a:oracle:vm_virtualbox:5.2.12:::::freebsd11:x64:1
        repo_type      : binary
        repository     : FreeBSD
Flat size      : 2.68MiB
Description    :
These additions are for installation inside a FreeBSD guest.

VirtualBox is a family of powerful x86 virtualization products for
enterprise as well as home use. Not only is VirtualBox an extremely
feature rich, high performance product for enterprise customers, it
is also the only professional solution that is freely available as
Open Source Software under the terms of the GNU General Public License.

WWW: http://www.virtualbox.org/

[rdanilov@rd-vm025 ~]$ kenv -q smbios.system.product
VirtualBox

[rdanilov@rd-vm025 ~]$ freebsd-version
11.2-RELEASE-p4