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4 years ago
#include "BootMgfw.h"
SHITHOOK BootMgfwShitHook;
EFI_DEVICE_PATH* EFIAPI GetBootMgfwPath(VOID)
{
UINTN HandleCount = NULL;
EFI_STATUS Result;
EFI_HANDLE* Handles = NULL;
EFI_DEVICE_PATH* DevicePath = NULL;
EFI_FILE_HANDLE VolumeHandle;
EFI_FILE_HANDLE BootMgfwHandle;
EFI_FILE_IO_INTERFACE* FileSystem = NULL;
// get all the handles to file systems...
if (EFI_ERROR((Result = gBS->LocateHandleBuffer(ByProtocol, &gEfiSimpleFileSystemProtocolGuid, NULL, &HandleCount, &Handles))))
{
Print(L"error getting file system handles -> 0x%p\n", Result);
return DevicePath;
}
// for each handle to the file system, open a protocol with it...
for (UINT32 Idx = 0u; Idx < HandleCount && !FileSystem; ++Idx)
{
if (EFI_ERROR((Result = gBS->OpenProtocol(Handles[Idx], &gEfiSimpleFileSystemProtocolGuid, (VOID**)&FileSystem, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL))))
{
Print(L"error opening protocol -> 0x%p\n", Result);
return DevicePath;
}
if (EFI_ERROR((Result = FileSystem->OpenVolume(FileSystem, &VolumeHandle))))
{
Print(L"error opening file system -> 0x%p\n", Result);
return DevicePath;
}
// if we found the correct file (\\efi\\microsoft\\boot\\bootmgfw.efi)
if (!EFI_ERROR(VolumeHandle->Open(VolumeHandle, &BootMgfwHandle, WINDOWS_BOOTMGR_PATH, EFI_FILE_MODE_READ, EFI_FILE_READ_ONLY)))
DevicePath = FileDevicePath(Handles[Idx], WINDOWS_BOOTMGR_PATH);
VolumeHandle->Close(BootMgfwHandle);
if (EFI_ERROR((Result = gBS->CloseProtocol(Handles[Idx], &gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL))))
{
Print(L"error closing protocol -> 0x%p\n", Result);
return DevicePath;
}
}
return DevicePath;
}
EFI_STATUS EFIAPI InstallBootMgfwHooks(EFI_HANDLE BootMgfwPath)
{
EFI_STATUS Result = EFI_SUCCESS;
EFI_LOADED_IMAGE* BootMgfw = NULL;
if (EFI_ERROR((Result = gBS->HandleProtocol(BootMgfwPath, &gEfiLoadedImageProtocolGuid, (VOID**)&BootMgfw))))
return Result;
Print(L"Image Base -> 0x%p\n", BootMgfw->ImageBase);
Print(L"Image Size -> 0x%x\n", BootMgfw->ImageSize);
VOID* ArchStartBootApplication =
FindPattern(
BootMgfw->ImageBase,
BootMgfw->ImageSize,
START_BOOT_APPLICATION,
"xxxxxxxxxxxxxxxxxxxxxxxx"
);
Print(L"ArchStartBootApplication -> 0x%p\n", ArchStartBootApplication);
MakeShitHook(&BootMgfwShitHook, ArchStartBootApplication, &ArchStartBootApplicationHook, TRUE);
return Result;
}
EFI_STATUS EFIAPI ArchStartBootApplicationHook(VOID* AppEntry, VOID* ImageBase, UINT32 ImageSize, UINT8 BootOption, VOID* ReturnArgs)
{
DisableShitHook(&BootMgfwShitHook);
VOID* LdrLoadImage = GetExport(ImageBase, "BlLdrLoadImage");
VOID* ImgAllocateImageBuffer =
FindPattern(
ImageBase,
ImageSize,
ALLOCATE_IMAGE_BUFFER_SIG,
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
);
Print(L"PE PayLoad Size -> 0x%x\n", GetGoldenRecordSize());
Print(L"winload base -> 0x%p\n", ImageBase);
Print(L"winload size -> 0x%x\n", ImageSize);
Print(L"winload.BlLdrLoadImage -> 0x%p\n", LdrLoadImage);
Print(L"winload.BlImgAllocateImageBuffer -> 0x%p\n", ImgAllocateImageBuffer);
MakeShitHook(&WinLoadImageShitHook, LdrLoadImage, &BlLdrLoadImage, TRUE);
MakeShitHook(&WinLoadAllocateImageHook, ImgAllocateImageBuffer, &BlImgAllocateImageBuffer, TRUE);
return ((IMG_ARCH_START_BOOT_APPLICATION)BootMgfwShitHook.Address)(AppEntry, ImageBase, ImageSize, BootOption, ReturnArgs);
}