Comment 19 for bug 1576768

See this issue as well:

$ groups
andrey_sidorov adm dialout cdrom sudo dip plugdev lpadmin sambashare docker wireshark vboxusers

$ ls -l /dev/vboxusb/003/
total 0
crw-rw---- 1 root vboxusers 189, 257 окт 9 13:11 002
crw-rw---- 1 root vboxusers 189, 258 окт 9 13:11 003
crw-rw---- 1 root vboxusers 189, 259 окт 9 13:11 004
crw-rw---- 1 root vboxusers 189, 262 окт 13 15:46 007

$ VBoxManage list usbhost
Host USB Devices:

<none>

$ sudo VBoxManage list usbhost
Host USB Devices:

UUID: d1f185b4-b9d0-4c7c-87cc-681ee61883bc
VendorId: 0x045e (045E)
ProductId: 0x07b9 (07B9)
Revision: 1.20 (0120)
Port: 5
USB version/speed: 2/Low
Manufacturer: LITEON Technology
Product: USB Keyboard
Address: sysfs:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-6//device:/dev/vboxusb/003/003
Current State: Busy

[etc...]

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial

$ VBoxManage -v
5.0.24_Ubuntur108355

$ VBoxManage list extpacks
Extension Packs: 2
Pack no. 0: VNC
Version: 5.0.24
Revision: 108355
Edition:
Description: VNC plugin module
VRDE Module: VBoxVNC
Usable: true
Why unusable:

Pack no. 1: Oracle VM VirtualBox Extension Pack
Version: 5.0.24
Revision: 108355
Edition:
Description: USB 2.0 and USB 3.0 Host Controller, Host Webcam, VirtualBox RDP, PXE ROM, Disk Encryption.
VRDE Module: VBoxVRDP
Usable: true
Why unusable: