vc++实现内核级进程保护

保护核心代码

#include "ntddk.h"

#define NT_DEVICE_NAME      L"//Device//ProtectProcess"
#define DOS_DEVICE_NAME     L"//DosDevices//ProtectProcess"

#define IOCTL_PROTECT_CONTROL CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)

NTSTATUS DispatchDeviceControl(IN PDEVICE_OBJECT  DeviceObject,IN PIRP  Irp);
VOID OnUnload(IN PDRIVER_OBJECT DriverObject);

#pragma pack(1) //SSDT表的结构
typedef struct ServiceDescriptorEntry {
unsigned int *ServiceTableBase;
unsigned int *ServiceCounterTableBase; //Used only in checked build
unsigned int NumberOfServices;
unsigned char *ParamTableBase;
} ServiceDescriptorTableEntry_t, *PServiceDescriptorTableEntry_t;
#pragma pack()

__declspec(dllimport) ServiceDescriptorTableEntry_t KeServiceDescriptorTable; //变量名是不能变的,因为是从外部导入
//这个是查询某个函数的地址的一个宏
#define SYSTEMSERVICE(_function)  KeServiceDescriptorTable.ServiceTableBase[*(PULONG)((PUCHAR)_function+1)]

NTSYSAPI NTSTATUS NTAPI ZwOpenProcess(OUT PHANDLE ProcessHandle,IN ACCESS_MASK DesiredAccess,IN POBJECT_ATTRIBUTES ObjectAttributes,IN PCLIENT_ID ClientId OPTIONAL);
typedef NTSTATUS (*ZWOPENPROCESS)(OUT PHANDLE ProcessHandle,IN ACCESS_MASK DesiredAccess,IN POBJECT_ATTRIBUTES ObjectAttributes,IN PCLIENT_ID ClientId OPTIONAL);

ZWOPENPROCESS OldZwOpenProcess;
long pid = -1;

NTSTATUS NewZwOpenProcess(OUT PHANDLE ProcessHandle,IN ACCESS_MASK DesiredAccess,IN POBJECT_ATTRIBUTES ObjectAttributes,IN PCLIENT_ID ClientId OPTIONAL)
{
//用来替换的新函数
NTSTATUS nStatus = STATUS_SUCCESS;
if((long)ClientId->UniqueProcess == pid)
{
  DbgPrint("保护进程 PID:%ld/n",pid);
  return STATUS_ACCESS_DENIED;
}

//剩下的交给我们的原函数
nStatus = OldZwOpenProcess(ProcessHandle,