另一种简便的Ring0恢复SSDTShadow主要源码

//Ring0恢复SSDTShadow主要源码 By VirusWizard
//主要思路和恢复SSDT是一样的。不多说了
NTSTATUS GetOrigShadowTable(
                             )
{
    NTSTATUS status = STATUS_UNSUCCESSFUL;
    HANDLE hFile = 0;
     OBJECT_ATTRIBUTES ObjAttr = {0};
    UNICODE_STRING ustrWin32k = {0};
     IO_STATUS_BLOCK ioStatus = {0};
     FILE_POSITION_INFORMATION fpi = {0};
    ULONG ulOffsetOfShadow = 0;
     PIMAGE_NT_HEADERS pNtHdr = NULL;
     LARGE_INTEGER Offset = {0};

    if (!KeServiceDescriptorTableShadow)
     {
        return STATUS_UNSUCCESSFUL;
     }

     dprintf("CountOfSSDTShadow : %d\n", KeServiceDescriptorTableShadow[1].Limit + 1);
     g_pOrigSSDTShadow = ExAllocatePool(
                 PagedPool,
                 (KeServiceDescriptorTableShadow[1].Limit + 1) * sizeof(ULONG));
    if ( !g_pOrigSSDTShadow )
     {
         dprintf("[GetOrigShadowTable] AllocateMemory Error.\n");
        return STATUS_UNSUCCESSFUL;
     }

     RtlInitUnicodeString(&ustrWin32k, L"\\SystemRoot\\System32\\win32k.sys");
     dprintf("ustrWin32k : %S.\n", ustrWin32k.Buffer);

     InitializeObjectAttributes(
         &ObjAttr,
         &ustrWin32k,
         OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
         NULL,
         NULL
     );

     status = ZwCreateFile(
                 &hFile,
                 GENERIC_READ,
                 &ObjAttr,
                 &ioStatus,
                 NULL,
                 FILE_ATTRIBUTE_NORMAL,
                 FILE_SHARE_READ,
                 FILE_OPEN,
                 FILE_NON_DIRECTORY_FILE | FILE_RANDOM_ACCESS | FILE_SYNCHRONOUS_IO_NONALERT,
                 NULL,
                 0
             );

    if ( !NT_SUCCESS(status) )
     {
         dprintf("ZwCreateFile Error.status = 0x%08X.\n", status);
        goto __exit;
     }

     pNtHdr = RtlImageNtHeader(g_pWin32kBase);
     ulOffsetOfShadow = RvaToOffset(pNtHdr, (ULONG)KeServiceDescriptorTableShadow[1].Base - (ULONG)g_pWin32kBase);
     dprintf("ulOffsetOfSSDT : 0x%08X.\n", ulOffsetOfShadow);

    if (ulOffsetOfShadow)
     {
         Offset.LowPart = ulOffsetOfShadow;
         Offset.HighPart = 0;

         status = ZwReadFile (
                     hFile,
                     NULL,
                     NULL,
                     NULL,
                     &ioStatus,
                     g_pOrigSSDTShadow,
                     KeServiceDescriptorTableShadow[1].Limit * sizeof(ULONG),
                     &Offset,
                     NULL
                 );
        if ( NT_SUCCESS(status) )
         {
            ULONG i;
             dprintf("ReadOrigShadowSuccess.\n");
            for (i = 0;i < KeServiceDescriptorTableShadow[1].Limit;i++)
             {
                 dprintf("Index : 0x%03X,ShadowRoutineAddr : 0x%08X\n", i,((ULONG *)g_pOrigSSDTShadow));
             }
         }
     }

__exit:
    if (hFile)
     {
         ZwClose(hFile);
     }
    return status;
}