Because WinPESE-x64 often runs as SYSTEM (highest privilege level), malicious versions could:
Security Considerations
To create a winpese-x64 environment, you can use tools like: winpese-x64
Boot a suspect machine using WinPESE to create a bit-for-bit disk image (using dd or FTK Imager) without altering the original evidence. Because WinPESE-x64 often runs as SYSTEM (highest privilege