Hackers use QEMU virtual machines to hide ransomware and bypass security ...
Hackers are dodging Windows security tools by running secret Linux virtual machines with QEMU, an open-source virtualizer.
If you need to use virtual machines on Linux, try Virt-Manager. Virt-Manager is more reliable than VirtualBox. Virt-Manager is completely free and open-source. I'm a long-time supporter of VirtualBox.