I recently created a virtualbox virtual machine of Ubuntu 18.04 and installed Anydesk remote desktop app in it. An IT guy accessed my computers desktop via Anydesk app, but he is actually inside the Ubuntu Virtual Machine on Virtualbox. I don't even mentioned anything about Virtualbox, but after asking me my laptop model and brand, in less than one minute he asked me "Are you using Virtualbox VM?". I startled, he even mentioned which virtualization software I am using( virtual box) even there is VMWARE, Parallel, Nutanix and manymore. My host machine is Linux Mint. Can anyone explain how our IT guy managed to know that I am running Ubuntu 18.04 inside virtualbox as a Virtual Machine.
I figured it out. Actually it's the username. When we create a virtual os in virtual box the default name will be -virtualBox, in my case Ubuntu-virtualBox. When we open a terminal this name is vividly displayed in the shell prompt. That's why he found out I am using virtual Box, even without running any other command in front of me. I know from Jim Browining videos we can actually change all details of the virtual box hardware and fake it. But This is not that case, since he doesn't even disconnect or put my screen blackout during the entire operation. So guy watchout for virtual box virtual machine name.