Use a hardened virtual machine that is hidden from "VM detection" triggers.
Virbox often hooks low-level APIs ( LoadLibraryA , GetProcAddress , CreateFile ). Some cracks succeed by (e.g., a custom kernel32.dll proxy) before Virbox initializes. virbox protector unpack top
With great unpacking power comes great responsibility. Use these techniques ethically, or prepare to face the legal protector stronger than Virbox: the federal court. Use a hardened virtual machine that is hidden