1.first intruction will be usermode will send a message to km saying hi once km recieves the message it will send a message back saying hi then usermode can send given intructions
2. make it so that usermode will send intructions with what it want km to do typedef struct _INSTRUCTIONS {
BOOLEAN close;
BOOLEAN read;
BOOLEAN reqBase;
PVOID bufferAddress;
UINT_PTR address;
ULONGLONG size;
PVOID output;
ULONG64 baseAddress;
char moduleName[256]; // Changed from 'const char' to a character array for string storage
} INSTRUCTIONS, PINSTRUCTIONS; that km will recieve intructions read and do it and after doing intruction it will send results to usermode and usermode will read and display result

tell me where i can write the modifications

do not change communication method



usermode
using System;
using NtApiDotNet;
using System.Threading;

namespace WnfSubscriber {
class Program {
// Define the WNF state name
private
const ulong MY_WNF_STATE_NAME = 0x41C64E6DA3BC1074;

static void Main(string[] args) {
WnfClient client = new WnfClient();

// Subscribe to the WNF state
client.SubscribeState(MY_WNF_STATE_NAME, OnWnfStateChange);

Console.WriteLine("Subscribed to WNF state. Waiting for changes...");

// Keep the application running
while (true) {
Thread.Sleep(1000);
}
}

// Callback when WNF state changes
static void OnWnfStateChange(WnfStateChange change) {
Console.WriteLine("WNF State Changed!");

// Assuming the state data is the INSTRUCTIONS structure
// Deserialize the data accordingly
if (change.Data.Length >= Marshal.SizeOf(typeof (INSTRUCTIONS))) {
INSTRUCTIONS instructions = change.Data.ToStructure < INSTRUCTIONS > ();

Console.WriteLine("Received Instructions:");
Console.WriteLine($"Close: {instructions.close}");
Console.WriteLine($"Read: {instructions.read}");
Console.WriteLine($"Request Base: {instructions.reqBase}");
Console.WriteLine($"Buffer Address: {instructions.bufferAddress}");
Console.WriteLine($"Address: 0x{instructions.address:X}");
Console.WriteLine($"Size: {instructions.size}");
Console.WriteLine($"Output: {instructions.output}");
Console.WriteLine($"Base Address: 0x{instructions.baseAddress:X}");
Console.WriteLine($"Module Name: {instructions.moduleName}");
} else {
Console.WriteLine("Received data is smaller than expected.");
}
}

// Define the INSTRUCTIONS structure
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
struct INSTRUCTIONS {
public byte close;
public byte read;
public byte reqBase;
public IntPtr bufferAddress;
public UIntPtr address;
public ulong size;
public IntPtr output;
public ulong baseAddress;

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
public string moduleName;
}
}
}

kernel mode
#include <ntifs.h>

#include <ntddk.h>

// ==========================================================
// Definitions and Macros
// ==========================================================

#define TARGET_PROCESS_NAME L "notepad.exe" // Replace with your target process name
#define MY_WNF_STATE_NAME 0x2821B2CA3BC4075 ULL // WNF_AUDC_CAPTURE

// Windows Build Numbers
#define WINDOWS_1803 17134
#define WINDOWS_1809 17763
#define WINDOWS_1903 18362
#define WINDOWS_1909 18363
#define WINDOWS_2004 19041
#define WINDOWS_20H2 19569
#define WINDOWS_21H1 20180

// Page size definitions
#define PAGE_OFFSET_SIZE 12
#define PMASK 0x000FFFFFFFFFF000 ull // Corrected PMASK for x64

// ==========================================================
// Function Pointer Types for WNF (Undocumented APIs)
// ==========================================================

typedef ULONG64 WNF_STATE_NAME;
typedef ULONG64 WNF_CHANGE_STAMP;

typedef enum _WNF_SUBSCRIPTION_FLAG {
WnfSubscriptionNone = 0x0,
WnfSubscriptionPublishCurrentState = 0x1,
// Add other flags as needed
}
WNF_SUBSCRIPTION_FLAG;

typedef struct _WNF_SUBSCRIPTION {
// Define necessary fields based on WNF structures
}
WNF_SUBSCRIPTION, PWNF_SUBSCRIPTION;

typedef struct _WNF_TYPE_ID {
// Define Type ID structure based on WNF specifications
}
WNF_TYPE_ID, PCWNF_TYPE_ID;

// Function pointer typedefs
typedef NTSTATUS(PExSubscribeWnfStateChange)(
PWNF_SUBSCRIPTION Subscription,
WNF_STATE_NAME StateName,
WNF_SUBSCRIPTION_FLAG SubscriptionFlag,
PVOID Callback,
PVOID CallbackContext,
PCWNF_TYPE_ID TypeId,
PVOID DeliveryDescriptor,
ULONG DeliveryDescriptorSize
);

typedef NTSTATUS(PExPublishWnfStateData)(
PCWNF_STATE_NAME StateName,
PVOID Buffer,
ULONG Length,
PCWNF_TYPE_ID TypeId,
PVOID ExplicitScope,
ULONG MatchingChangeStamp
);

typedef NTSTATUS(PExUnsubscribeWnfStateChange)(
PWNF_SUBSCRIPTION Subscription
);

// Global function pointers
PExPublishWnfStateData ExPublishWnfStateDataFunc = NULL;
PExUnsubscribeWnfStateChange ExUnsubscribeWnfStateChangeFunc = NULL;

// ==========================================================
// Data Structures
// ==========================================================

typedef struct _INSTRUCTIONS {
BOOLEAN close;
BOOLEAN read;
BOOLEAN reqBase;
PVOID bufferAddress;
UINT_PTR address;
ULONGLONG size;
PVOID output;
ULONG64 baseAddress;
char moduleName[256]; // Changed from 'const char' to a character array for string storage
}
INSTRUCTIONS, PINSTRUCTIONS;

// ==========================================================
// Function Declarations
// ==========================================================

NTKERNELAPI
PVOID
PsGetProcessSectionBaseAddress(
__in PEPROCESS Process
);

PVOID GetProcessBaseAddress(HANDLE pid);
DWORD GetUserDirectoryTableBaseOffset();
ULONG_PTR GetProcessCr3(PEPROCESS pProcess);
ULONG_PTR GetKernelDirBase();
NTSTATUS ReadVirtual(uint64_t dirbase, uint64_t address, uint8_t buffer, SIZE_T size, SIZE_T read);
NTSTATUS WriteVirtual(uint64_t dirbase, uint64_t address, uint8_t buffer, SIZE_T size, SIZE_T written);
NTSTATUS ReadPhysicalAddress(PVOID TargetAddress, PVOID lpBuffer, SIZE_T Size, SIZE_T BytesRead);
NTSTATUS WritePhysicalAddress(PVOID TargetAddress, PVOID lpBuffer, SIZE_T Size, SIZE_T BytesWritten);
uint64_t TranslateLinearAddress(uint64_t directoryTableBase, uint64_t virtualAddress);
NTSTATUS ReadProcessMemory(int pid, PVOID Address, PVOID AllocatedBuffer, SIZE_T size, SIZE_T read);
NTSTATUS WriteProcessMemory(int pid, PVOID Address, PVOID AllocatedBuffer, SIZE_T size, SIZE_T * written);
VOID ProcessNotifyCallback(
__in HANDLE ParentId,
__in HANDLE ProcessId,
__in BOOLEAN Create
);
VOID DriverUnload(PDRIVER_OBJECT DriverObject);

// ==========================================================
// Global Variables
// ==========================================================

PWNF_SUBSCRIPTION g_WnfSubscription = NULL;

// ==========================================================
// Function Definitions
// ==========================================================

// Retrieve the base address of a process given its PID
PVOID GetProcessBaseAddress(HANDLE pid) {
PEPROCESS pProcess = NULL;
if (pid == NULL) return NULL;

NTSTATUS NtRet = PsLookupProcessByProcessId(pid, & pProcess);
if (NtRet != STATUS_SUCCESS) return NULL;

PVOID Base = PsGetProcessSectionBaseAddress(pProcess);
ObDereferenceObject(pProcess);
return Base;
}

// Get the offset for the UserDirectoryTableBase based on Windows version
DWORD GetUserDirectoryTableBaseOffset() {
RTL_OSVERSIONINFOW ver = {
0
};
RtlGetVersion( & ver);

switch (ver.dwBuildNumber) {
case WINDOWS_1803:
case WINDOWS_1809:
return 0x0278;
case WINDOWS_1903:
case WINDOWS_1909:
case WINDOWS_2004:
case WINDOWS_20H2:
case WINDOWS_21H1:
default:
return 0x0388;
}
}

// Retrieve the CR3 (Page Directory Base) of a process
ULONG_PTR GetProcessCr3(PEPROCESS pProcess) {
PUCHAR process = (PUCHAR) pProcess;
#ifdef _WIN64
ULONG_PTR * process_dirbase_ptr = (ULONG_PTR)(process + 0x28); // dirbase for x64
#else
ULONG_PTR process_dirbase_ptr = (ULONG_PTR * )(process + 0x18); // dirbase for x86
#endif
ULONG_PTR process_dirbase = process_dirbase_ptr;

if (process_dirbase == 0) {
DWORD UserDirOffset = GetUserDirectoryTableBaseOffset();
ULONG_PTR process_userdirbase_ptr = (ULONG_PTR * )(process + UserDirOffset);
return process_userdirbase_ptr;
}
return process_dirbase;
}

// Example function to get the kernel's CR3 (for demonstration; typically not used)
ULONG_PTR GetKernelDirBase() {
// Note: Accessing the kernel's CR3 is generally unsafe and not recommended
// This is just for illustrative purposes
return __readcr3();
}

// Translate a virtual address to a physical address using the provided directory table base
uint64_t TranslateLinearAddress(uint64_t directoryTableBase, uint64_t virtualAddress) {
directoryTableBase &= 0xFFFFFFFFFF000 ull; // Align directoryTableBase

uint64_t pageOffset = virtualAddress & 0xFFF;
uint64_t pte = (virtualAddress >> 12) & 0x1FF;
uint64_t pt = (virtualAddress >> 21) & 0x1FF;
uint64_t pd = (virtualAddress >> 30) & 0x1FF;
uint64_t pdp = (virtualAddress >> 39) & 0x1FF;

SIZE_T readsize = 0;
uint64_t pdpe = 0;
if (!NT_SUCCESS(ReadPhysicalAddress((PVOID)(directoryTableBase + 8 * pdp), & pdpe, sizeof(pdpe), & readsize)) || (pdpe & 1))
return 0;

uint64_t pde = 0;
if (!NT_SUCCESS(ReadPhysicalAddress((PVOID)((pdpe & PMASK) + 8 * pd), & pde, sizeof(pde), & readsize)) || (pde & 1))
return 0;

// 1GB large page
if (pde & (1 << 7)) // Check the PS (Page Size) bit
return (pde & 0x000FFFFFFFFFF000 ull) + (virtualAddress & 0x3FFFFFFF ull);

uint64_t pteAddr = 0;
if (!NT_SUCCESS(ReadPhysicalAddress((PVOID)((pde & PMASK) + 8 * pt), & pteAddr, sizeof(pteAddr), & readsize)) || (pteAddr & 1))
return 0;

// 2MB large page
if (pteAddr & (1 << 7)) // Check the PS bit
return (pteAddr & PMASK) + (virtualAddress & 0x1FFFFF ull);

uint64_t physPage = 0;
if (!NT_SUCCESS(ReadPhysicalAddress((PVOID)((pteAddr & PMASK) + 8 * pte), & physPage, sizeof(physPage), & readsize)) || !(physPage & 1))
return 0;

physPage &= PMASK;
return physPage + pageOffset;
}

// Read a physical address into a buffer
NTSTATUS ReadPhysicalAddress(PVOID TargetAddress, PVOID lpBuffer, SIZE_T Size, SIZE_T BytesRead) {
if (TargetAddress == NULL || lpBuffer == NULL || BytesRead == NULL)
return STATUS_INVALID_PARAMETER;

MM_COPY_ADDRESS AddrToRead = {
0
};
AddrToRead.PhysicalAddress.QuadPart = (ULONG_PTR) TargetAddress;

NTSTATUS status = MmCopyMemory(lpBuffer, AddrToRead, Size, MM_COPY_MEMORY_PHYSICAL, BytesRead);
return status;
}

// Write a buffer to a physical address
NTSTATUS WritePhysicalAddress(PVOID TargetAddress, PVOID lpBuffer, SIZE_T Size, SIZE_T * BytesWritten) {
if (!TargetAddress || !lpBuffer || !BytesWritten)
return STATUS_INVALID_PARAMETER;

PHYSICAL_ADDRESS AddrToWrite = {
0
};
AddrToWrite.QuadPart = (ULONG_PTR) TargetAddress;

// Limit MmMapIoSpaceEx to PAGE_SIZE (4096 bytes)
if (Size > PAGE_SIZE)
return STATUS_INVALID_PARAMETER;

PVOID pmapped_mem = MmMapIoSpaceEx(AddrToWrite, Size, PAGE_READWRITE);
if (!pmapped_mem)
return STATUS_UNSUCCESSFUL;

RtlCopyMemory(pmapped_mem, lpBuffer, Size);
BytesWritten = Size;
MmUnmapIoSpace(pmapped_mem, Size);
return STATUS_SUCCESS;
}

// Read virtual memory from a process
NTSTATUS ReadVirtual(uint64_t dirbase, uint64_t address, uint8_t buffer, SIZE_T size, SIZE_T * read) {
if (!buffer || !read)
return STATUS_INVALID_PARAMETER;

uint64_t paddress;
NTSTATUS status = STATUS_SUCCESS;
SIZE_T CurOffset = 0;
SIZE_T TotalSize = size;

while (TotalSize > 0) {
paddress = TranslateLinearAddress(dirbase, address + CurOffset);
if (!paddress)
return STATUS_UNSUCCESSFUL;

ULONG64 ReadSize = min(PAGE_SIZE - (paddress & 0xFFF), TotalSize);
SIZE_T BytesReadLocal = 0;

status = ReadPhysicalAddress((PVOID) paddress, buffer + CurOffset, ReadSize, & BytesReadLocal);
if (!NT_SUCCESS(status) || BytesReadLocal == 0)
break;

TotalSize -= BytesReadLocal;
CurOffset += BytesReadLocal;
}

read = CurOffset;
return status;
}

// Write virtual memory to a process
NTSTATUS WriteVirtual(uint64_t dirbase, uint64_t address, uint8_t buffer, SIZE_T size, SIZE_T * written) {
if (!buffer || !written)
return STATUS_INVALID_PARAMETER;

uint64_t paddress;
NTSTATUS status = STATUS_SUCCESS;
SIZE_T CurOffset = 0;
SIZE_T TotalSize = size;

while (TotalSize > 0) {
paddress = TranslateLinearAddress(dirbase, address + CurOffset);
if (!paddress)
return STATUS_UNSUCCESSFUL;

ULONG64 WriteSize = min(PAGE_SIZE - (paddress & 0xFFF), TotalSize);
SIZE_T BytesWrittenLocal = 0;

status = WritePhysicalAddress((PVOID) paddress, buffer + CurOffset, WriteSize, & BytesWrittenLocal);
if (!NT_SUCCESS(status) || BytesWrittenLocal == 0)
break;

TotalSize -= BytesWrittenLocal;
CurOffset += BytesWrittenLocal;
}

written = CurOffset;
return status;
}

// Read the memory of a process by PID
NTSTATUS ReadProcessMemory(int pid, PVOID Address, PVOID AllocatedBuffer, SIZE_T size, SIZE_T read) {
if (pid == 0 || Address == NULL || AllocatedBuffer == NULL || read == NULL)
return STATUS_INVALID_PARAMETER;

PEPROCESS pProcess = NULL;
NTSTATUS NtRet = PsLookupProcessByProcessId((HANDLE)(ULONG_PTR) pid, & pProcess);
if (NtRet != STATUS_SUCCESS)
return NtRet;

ULONG_PTR process_dirbase = GetProcessCr3(pProcess);
ObDereferenceObject(pProcess);

NtRet = ReadVirtual(process_dirbase, (ULONG_PTR) Address, (uint8_t * ) AllocatedBuffer, size, read);
return NtRet;
}

// Write the memory of a process by PID
NTSTATUS WriteProcessMemory(int pid, PVOID Address, PVOID AllocatedBuffer, SIZE_T size, SIZE_T * written) {
if (pid == 0 || Address == NULL || AllocatedBuffer == NULL || written == NULL)
return STATUS_INVALID_PARAMETER;

PEPROCESS pProcess = NULL;
NTSTATUS NtRet = PsLookupProcessByProcessId((HANDLE)(ULONG_PTR) pid, & pProcess);
if (NtRet != STATUS_SUCCESS)
return NtRet;

ULONG_PTR process_dirbase = GetProcessCr3(pProcess);
ObDereferenceObject(pProcess);

NtRet = WriteVirtual(process_dirbase, (ULONG_PTR) Address, (uint8_t * ) AllocatedBuffer, size, written);
return NtRet;
}

// Callback function for WNF state changes
NTSTATUS notifCallback(
PWNF_SUBSCRIPTION Subscription,
WNF_STATE_NAME StateName,
ULONG SubscribedEventSet,
WNF_CHANGE_STAMP ChangeStamp,
PCWNF_TYPE_ID TypeId,
PVOID CallbackContext
) {
UNREFERENCED_PARAMETER(TypeId);
UNREFERENCED_PARAMETER(CallbackContext);
UNREFERENCED_PARAMETER(SubscribedEventSet);

NTSTATUS status = STATUS_SUCCESS;
ULONG bufferSize = 0x0;
PVOID pStateData = NULL;
WNF_CHANGE_STAMP changeStampLocal = 0;

// Query required buffer size
status = ExQueryWnfStateDataFunc(Subscription, & changeStampLocal, NULL, & bufferSize);
if (status != STATUS_BUFFER_TOO_SMALL)
goto Exit;

// Allocate buffer
pStateData = ExAllocatePoolWithTag(PagedPool, bufferSize, 'LULZ');
if (pStateData == NULL) {
status = STATUS_UNSUCCESSFUL;
goto Exit;
}

// Query the state data
status = ExQueryWnfStateDataFunc(Subscription, & changeStampLocal, pStateData, & bufferSize);
if (NT_SUCCESS(status)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "## Data processed: %S\n", (PWSTR) pStateData);
// Implement further processing of pStateData as needed
}

Exit:
if (pStateData != NULL)
ExFreePoolWithTag(pStateData, 'LULZ');
return status;
}

// Function to subscribe to WNF state changes
NTSTATUS CallExSubscribeWnfStateChange() {
PWNF_SUBSCRIPTION wnfSubscription = NULL;
WNF_STATE_NAME stateName = MY_WNF_STATE_NAME; // Use the corrected WNF state name
NTSTATUS status;

status = ExSubscribeWnfStateChange( & wnfSubscription, stateName, WnfSubscriptionPublishCurrentState,
NULL, ¬ifCallback, NULL, NULL, 0);
if (NT_SUCCESS(status)) {
g_WnfSubscription = wnfSubscription;
DbgPrint("Subscription address: %p\n", (PVOID) wnfSubscription);
}

return status;
}

// ==========================================================
// Process Notification Callback
// ==========================================================

VOID ProcessNotifyCallback(
__in HANDLE ParentId,
__in HANDLE ProcessId,
__in BOOLEAN Create
) {
UNREFERENCED_PARAMETER(ParentId);

if (Create) {
PEPROCESS pProcess = NULL;
NTSTATUS status = PsLookupProcessByProcessId(ProcessId, & pProcess);
if (NT_SUCCESS(status)) {
// Get process image file name
WCHAR imageName[300] = {
0
};
UNICODE_STRING uProcessImageName = {
0
};

// Use SeLocateProcessImageName
status = SeLocateProcessImageName(pProcess, & uProcessImageName);
if (NT_SUCCESS(status)) {
// Extract file name from full path
PWSTR processName = wcsrchr(uProcessImageName.Buffer, L ''); // Corrected to search for backslash
if (processName) {
processName++; // Move past the backslash

// Check if this is the target process
if (_wcsicmp(processName, TARGET_PROCESS_NAME) == 0) {
// Perform memory operations here

// Get base address
PVOID baseAddress = GetProcessBaseAddress(ProcessId);
if (baseAddress) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Base address of %ws: %p\n", processName, baseAddress);

// Example: Read some memory from the process
UCHAR buffer[256] = {
0
};
SIZE_T bytesRead = 0;
NTSTATUS ntStatus = ReadProcessMemory((int)(ULONG_PTR) ProcessId, baseAddress, buffer, sizeof(buffer), & bytesRead);

if (NT_SUCCESS(ntStatus)) {
// Do something with the read data
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Successfully read %zu bytes from %ws\n", bytesRead, processName);
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to read process memory: 0x%X\n", ntStatus);
}

// Example: Write to process memory (be cautious with actual addresses)
/
UCHAR writeData[256] = {
/ ... */
};
SIZE_T bytesWritten = 0;
ntStatus = WriteProcessMemory((int)(ULONG_PTR) ProcessId, baseAddress, writeData, sizeof(writeData), & bytesWritten);

if (NT_SUCCESS(ntStatus)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Successfully wrote %zu bytes to %ws\n", bytesWritten, processName);
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to write process memory: 0x%X\n", ntStatus);
}
/
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to get base address of %ws\n", processName);
}
}
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to parse process name\n");
}

// Free the UNICODE_STRING allocated by SeLocateProcessImageName
ExFreePoolWithTag(uProcessImageName.Buffer, 'imgN');
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] SeLocateProcessImageName failed with status: 0x%X\n", status);
}

ObDereferenceObject(pProcess);
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] PsLookupProcessByProcessId failed with status: 0x%X\n", status);
}
}
}

// ==========================================================
// Driver Unload Routine
// ==========================================================

VOID DriverUnload(PDRIVER_OBJECT DriverObject) {
UNICODE_STRING symbolicLinkName;
RtlInitUnicodeString( & symbolicLinkName, L "??\MyKernelDriverLink");

// Remove the process notify routine
NTSTATUS status = PsSetCreateProcessNotifyRoutine(ProcessNotifyCallback, TRUE);
if (!NT_SUCCESS(status)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to remove process notify routine: 0x%X\n", status);
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Process notify routine removed successfully\n");
}

// Unsubscribe WNF state change if subscribed
if (g_WnfSubscription != NULL && ExUnsubscribeWnfStateChangeFunc != NULL) {
ExUnsubscribeWnfStateChangeFunc(g_WnfSubscription);
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] WNF subscription unsubscribed successfully\n");
}

// Delete the symbolic link and device object (if created)
// Assuming device creation was implemented as per user requirements. If not, this section can be omitted.

DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Driver unloaded\n");
}

// ==========================================================
// WNF Functions and DriverEntry Implementation
// ==========================================================

// Function to initialize WNF communication
NTSTATUS InitializeWNF() {
// Dynamically resolve the ExPublishWnfStateData function
UNICODE_STRING publishFunctionName;
RtlInitUnicodeString( & publishFunctionName, L "ExPublishWnfStateData");
ExPublishWnfStateDataFunc = (PExPublishWnfStateData) MmGetSystemRoutineAddress( & publishFunctionName);

// Dynamically resolve the ExUnsubscribeWnfStateChange function
UNICODE_STRING unsubscribeFunctionName;
RtlInitUnicodeString( & unsubscribeFunctionName, L "ExUnsubscribeWnfStateChange");
ExUnsubscribeWnfStateChangeFunc = (PExUnsubscribeWnfStateChange) MmGetSystemRoutineAddress( & unsubscribeFunctionName);

if (ExPublishWnfStateDataFunc == NULL || ExUnsubscribeWnfStateChangeFunc == NULL) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] Failed to resolve WNF functions\n");
return STATUS_UNSUCCESSFUL;
}

// Prepare your data (if needed)
/
INSTRUCTIONS instructions = {
0
};
instructions.reqBase = TRUE;
instructions.baseAddress = 0x12345678; // Example base address
instructions.output = (PVOID) instructions.baseAddress;

// Publish the data to the WNF state
NTSTATUS status = ExPublishWnfStateDataFunc( &
MY_WNF_STATE_NAME, &
instructions,
sizeof(INSTRUCTIONS),
NULL,
NULL,
0
);

if (!NT_SUCCESS(status)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] ExPublishWnfStateData failed: 0x%08X\n", status);
return status;
}

DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Published WNF state data successfully\n");
/

// Subscribe to the WNF state change
status = CallExSubscribeWnfStateChange();
if (!NT_SUCCESS(status)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] ExSubscribeWnfStateChange failed: 0x%08X\n", status);
return status;
}

DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Subscribed to WNF state changes successfully\n");
return STATUS_SUCCESS;
}

// Main DriverEntry function
NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath) {
UNREFERENCED_PARAMETER(RegistryPath);

NTSTATUS status;

// Register the process creation notify routine
status = PsSetCreateProcessNotifyRoutine(ProcessNotifyCallback, FALSE);
if (!NT_SUCCESS(status)) {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] PsSetCreateProcessNotifyRoutine failed: 0x%X\n", status);
return status;
} else {
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Process notify routine set successfully\n");
}

// Initialize WNF communication
status = InitializeWNF();
if (!NT_SUCCESS(status)) {
// If WNF initialization fails, unload the driver
PsSetCreateProcessNotifyRoutine(ProcessNotifyCallback, TRUE);
DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_ERROR_LEVEL, "[Driver] WNF initialization failed. Driver will unload.\n");
return status;
}

// Set the unload routine
DriverObject -> DriverUnload = DriverUnload;

DbgPrintEx(DPFLTR_IHVDRIVER_ID, DPFLTR_INFO_LEVEL, "[Driver] Driver loaded successfully\n");
return STATUS_SUCCESS;
}