驱动编程软件SSDT内核函数宝盒

易语言 2020-08-03 17:42:30

驱动编程软件SSDT内核函数宝盒

代码部分:

对于KeServiceDescriptorTable的类型定义如下:

typedef struct _SERVICE_DESCRIPTOR_TABLE

{

PULONG ServiceTableBase; //指向系统服务函数地址表

PULONG ServiceCounterTableBase;

ULONG NumberOfService; //服务函数的个数,NumberOfService*4 就是整个地址表的大小

ULONG ParamTableBase;

}SERVICE_DESCRIPTOR_TABLE,*PSERVICE_DESCRIPTOR_TABLE;

//KeServiceDescriptorTable为导出函数



extern "C" PSERVICE_DESCRIPTOR_TABLE KeServiceDescriptorTable;

驱动入口函数:

extern "C" NTSTATUS DriverEntry ( IN PDRIVER_OBJECT pDriverObject, IN PUNICODE_STRING pRegistryPath )

{
NTSTATUS status; //定义驱动卸载函数 pDriverObject->DriverUnload = OnUnload; //调用HOOK Hook();
return STATUS_SUCCESS;

}

驱动卸载函数:

VOID OnUnload(IN PDRIVER_OBJECT pDriverObject)

{

//调用恢复HOOK

Unhook();

}

HOOK函数:

VOID Hook()

{

  //得到内核函数在SSDT表中索引的地址,其中0x3E是服务ID号

  ULONG NtDeleteFileAddress = (ULONG)(KeServiceDescriptorTable->ServiceTableBase+0x3E);

  //在SSDT表中取到内核函数的地址,并保存以便卸载驱动的时候恢复

  OldNtDeleteFile = *(ULONG*)NtDeleteFileAddress ;

  __asm

  {

    //去掉内存保护

    cli mov eax,cr0

    and eax,not 10000h

    mov cr0,eax

  }

  //把我们自己函数写进SSDT表中索引位置

  *(ULONG*)NtDeleteFileAddress = (ULONG)MyNtDeleteFile;

  __asm

  {

    //恢复内存保护 mov eax,cr0 or eax,10000h mov cr0,eax sti

  }

}

UNHOOK函数:

VOID Unhook()

{

   //得到内核函数在SSDT表中索引的地址

  ULONG NtDeleteFileAddress = (ULONG)(KeServiceDescriptorTable->ServiceTableBase+0x3E);

  __asm

  {

     cli mov eax,cr0

    and eax,not 10000h

    mov cr0,eax

   }

  //在SSDT表中索引的地址恢复系统内核函数

  *(ULONG*)NtDeleteFileAddress = (ULONG)OldNtDeleteFile;

  __asm{ mov eax,cr0 or eax,10000h mov cr0,eax sti }

}

//自定义函数

NTSTATUS MyNtDeleteFile( IN POBJECT_ATTRIBUTES ObjectAttributes)

{

  //函数内可做过滤,如放行则可调用原来函数

  return STATUS_SUCCESS;

}