While there is no single "one-click" unpacker for Virbox Protector due to its customizability, security researchers often use a suite of tools: Used for dynamic analysis and finding the OEP.
For manual stepping and breakpoint setting. Scylla: For memory dumping and IAT reconstruction. Process Dump: To grab the decrypted code from RAM.
Converts standard instructions into a private instruction set. Anti-Debugging/Anti-Injection:
Identify the where the protector hands control back to the actual application code.