diff --git a/DriverCommon.h b/DriverCommon.h
new file mode 100644
index 0000000..83548e3
--- /dev/null
+++ b/DriverCommon.h
@@ -0,0 +1,139 @@
+#pragma once
+#include <fltKernel.h>
+#include <ntddk.h>      
+#include <ntdddisk.h>   
+#include <ntddscsi.h> 
+#include <ntstrsafe.h>
+
+constexpr auto PYAS_PORT_NAME = L"\\PYAS_Output_Pipe";
+constexpr auto MAX_PATH_LEN = 1024;
+constexpr auto PYAS_POOL_TAG = 'SAYP';
+
+#ifndef PROCESS_TERMINATE
+#define PROCESS_TERMINATE                  (0x0001)
+#endif
+#ifndef PROCESS_CREATE_THREAD
+#define PROCESS_CREATE_THREAD              (0x0002)
+#endif
+#ifndef PROCESS_VM_OPERATION
+#define PROCESS_VM_OPERATION               (0x0008)
+#endif
+#ifndef PROCESS_VM_READ
+#define PROCESS_VM_READ                    (0x0010)
+#endif
+#ifndef PROCESS_VM_WRITE
+#define PROCESS_VM_WRITE                   (0x0020)
+#endif
+#ifndef PROCESS_DUP_HANDLE
+#define PROCESS_DUP_HANDLE                 (0x0040)
+#endif
+#ifndef PROCESS_CREATE_PROCESS
+#define PROCESS_CREATE_PROCESS             (0x0080)
+#endif
+#ifndef PROCESS_SET_INFORMATION
+#define PROCESS_SET_INFORMATION            (0x0200)
+#endif
+#ifndef PROCESS_QUERY_INFORMATION
+#define PROCESS_QUERY_INFORMATION          (0x0400)
+#endif
+#ifndef PROCESS_SUSPEND_RESUME
+#define PROCESS_SUSPEND_RESUME             (0x0800)
+#endif
+#ifndef PROCESS_QUERY_LIMITED_INFORMATION
+#define PROCESS_QUERY_LIMITED_INFORMATION  (0x1000)
+#endif
+
+#ifndef POOL_FLAG_NON_PAGED
+#define POOL_FLAG_NON_PAGED 0x0000000000000040UI64
+#endif
+
+#ifndef FSCTL_MANAGE_BYPASS_IO
+#define FSCTL_MANAGE_BYPASS_IO CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 188, METHOD_NEITHER, FILE_ANY_ACCESS)
+
+typedef enum _FS_BPIO_OPERATIONS {
+    FS_BPIO_OP_ENABLE = 1,
+    FS_BPIO_OP_DISABLE = 2,
+    FS_BPIO_OP_QUERY = 3,
+    FS_BPIO_OP_VOLUME_STACK_PAUSE = 4,
+    FS_BPIO_OP_VOLUME_STACK_RESUME = 5,
+    FS_BPIO_OP_STREAM_PAUSE = 6,
+    FS_BPIO_OP_STREAM_RESUME = 7,
+    FS_BPIO_OP_GET_INFO = 8
+} FS_BPIO_OPERATIONS;
+
+typedef struct _FS_BPIO_INPUT {
+    FS_BPIO_OPERATIONS Operation;
+    ULONG InFlags;
+    ULONGLONG Reserved1;
+    ULONGLONG Reserved2;
+} FS_BPIO_INPUT, * PFS_BPIO_INPUT;
+
+typedef struct _FS_BPIO_OUTPUT {
+    FS_BPIO_OPERATIONS Operation;
+    ULONG OutFlags;
+    ULONGLONG Reserved1;
+    ULONGLONG Reserved2;
+    NTSTATUS Status;
+} FS_BPIO_OUTPUT, * PFS_BPIO_OUTPUT;
+
+#endif
+
+typedef struct _PYAS_MESSAGE {
+    ULONG MessageCode;
+    ULONG ProcessId;
+    WCHAR Path[MAX_PATH_LEN];
+} PYAS_MESSAGE, * PPYAS_MESSAGE;
+
+typedef struct _DRIVER_DATA {
+    PDRIVER_OBJECT DriverObject;
+    PFLT_FILTER FilterHandle;
+    PFLT_PORT ServerPort;
+    PFLT_PORT ClientPort;
+    PEPROCESS PyasProcess;
+    ULONG PyasPid;
+    LARGE_INTEGER Cookie;
+    FAST_MUTEX PortMutex;
+    FAST_MUTEX TrackerMutex;
+    EX_RUNDOWN_REF PortRundown;
+} DRIVER_DATA, * PDRIVER_DATA;
+
+extern DRIVER_DATA GlobalData;
+
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreCreate(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext);
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreWrite(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext);
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreSetInfo(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext);
+FLT_PREOP_CALLBACK_STATUS ProtectFile_FileSystemControl(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext);
+FLT_PREOP_CALLBACK_STATUS ProtectBoot_PreDeviceControl(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext);
+
+NTSTATUS InitializeProcessProtection();
+VOID UninitializeProcessProtection();
+NTSTATUS InitializeRegistryProtection(PDRIVER_OBJECT DriverObject);
+VOID UninitializeRegistryProtection();
+
+VOID ImageLoadNotify(PUNICODE_STRING FullImageName, HANDLE ProcessId, PIMAGE_INFO ImageInfo);
+
+BOOLEAN IsProcessTrusted(HANDLE ProcessId);
+BOOLEAN IsTargetProtected(HANDLE ProcessId);
+BOOLEAN IsInstallerProcess(HANDLE ProcessId);
+BOOLEAN WildcardMatch(PCWSTR Pattern, PCWSTR String, USHORT StringLengthBytes);
+
+BOOLEAN CheckRegistryRule(PCUNICODE_STRING KeyName);
+BOOLEAN CheckFileExtensionRule(PCUNICODE_STRING FileName);
+BOOLEAN CheckProtectedPathRule(PCUNICODE_STRING FileName);
+BOOLEAN CheckRansomActivity(HANDLE ProcessId, PUNICODE_STRING FileName, PVOID Buffer, ULONG Length, BOOLEAN IsWrite);
+
+NTSTATUS SendMessageToUser(ULONG Code, ULONG Pid, PWCHAR Path, USHORT PathSize);
+
+FORCEINLINE PVOID PyasAllocate(SIZE_T Size) {
+#if (NTDDI_VERSION >= NTDDI_WIN10_VB)
+    return ExAllocatePool2(POOL_FLAG_NON_PAGED, Size, PYAS_POOL_TAG);
+#else
+    PVOID Buffer = ExAllocatePoolWithTag(NonPagedPoolNx, Size, PYAS_POOL_TAG);
+    if (Buffer) RtlZeroMemory(Buffer, Size);
+    return Buffer;
+#endif
+}
+
+FORCEINLINE VOID PyasFree(PVOID Ptr) {
+    if (Ptr) ExFreePoolWithTag(Ptr, PYAS_POOL_TAG);
+}
\ No newline at end of file
diff --git a/DriverEntry.cpp b/DriverEntry.cpp
new file mode 100644
index 0000000..db6c8a0
--- /dev/null
+++ b/DriverEntry.cpp
@@ -0,0 +1,141 @@
+#include "DriverCommon.h"
+
+DRIVER_DATA GlobalData;
+
+static NTSTATUS InstanceSetup(PCFLT_RELATED_OBJECTS FltObjects, FLT_INSTANCE_SETUP_FLAGS Flags, DEVICE_TYPE VolumeDeviceType, FLT_FILESYSTEM_TYPE VolumeFilesystemType) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(Flags);
+    UNREFERENCED_PARAMETER(VolumeDeviceType);
+    UNREFERENCED_PARAMETER(VolumeFilesystemType);
+    return STATUS_SUCCESS;
+}
+
+static NTSTATUS InstanceQueryTeardown(PCFLT_RELATED_OBJECTS FltObjects, FLT_INSTANCE_QUERY_TEARDOWN_FLAGS Flags) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(Flags);
+    return STATUS_SUCCESS;
+}
+
+static VOID InstanceTeardownStart(PCFLT_RELATED_OBJECTS FltObjects, FLT_INSTANCE_TEARDOWN_FLAGS Flags) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(Flags);
+}
+
+static VOID InstanceTeardownComplete(PCFLT_RELATED_OBJECTS FltObjects, FLT_INSTANCE_TEARDOWN_FLAGS Flags) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(Flags);
+}
+
+static NTSTATUS DriverUnload(FLT_FILTER_UNLOAD_FLAGS Flags) {
+    UNREFERENCED_PARAMETER(Flags);
+
+    PsRemoveLoadImageNotifyRoutine(ImageLoadNotify);
+    UninitializeRegistryProtection();
+    UninitializeProcessProtection();
+
+    ExWaitForRundownProtectionRelease(&GlobalData.PortRundown);
+
+    if (GlobalData.ServerPort) {
+        FltCloseCommunicationPort(GlobalData.ServerPort);
+    }
+    if (GlobalData.FilterHandle) {
+        FltUnregisterFilter(GlobalData.FilterHandle);
+    }
+    return STATUS_SUCCESS;
+}
+
+static NTSTATUS PortConnect(PFLT_PORT ClientPort, PVOID ServerPortCookie, PVOID ConnectionContext, ULONG SizeOfContext, PVOID* ConnectionPortCookie) {
+    UNREFERENCED_PARAMETER(ServerPortCookie);
+    UNREFERENCED_PARAMETER(ConnectionContext);
+    UNREFERENCED_PARAMETER(SizeOfContext);
+    UNREFERENCED_PARAMETER(ConnectionPortCookie);
+
+    ExAcquireFastMutex(&GlobalData.PortMutex);
+
+    GlobalData.ClientPort = ClientPort;
+    GlobalData.PyasPid = (ULONG)(ULONG_PTR)PsGetCurrentProcessId();
+    GlobalData.PyasProcess = PsGetCurrentProcess();
+
+    ExReInitializeRundownProtection(&GlobalData.PortRundown);
+
+    ExReleaseFastMutex(&GlobalData.PortMutex);
+
+    return STATUS_SUCCESS;
+}
+
+static VOID PortDisconnect(PVOID ConnectionCookie) {
+    UNREFERENCED_PARAMETER(ConnectionCookie);
+
+    ExAcquireFastMutex(&GlobalData.PortMutex);
+    GlobalData.ClientPort = NULL;
+    GlobalData.PyasPid = 0;
+    if (GlobalData.PyasProcess) {
+        GlobalData.PyasProcess = NULL;
+    }
+    ExReleaseFastMutex(&GlobalData.PortMutex);
+
+    ExWaitForRundownProtectionRelease(&GlobalData.PortRundown);
+}
+
+CONST FLT_OPERATION_REGISTRATION Callbacks[] = {
+    { IRP_MJ_CREATE, 0, ProtectFile_PreCreate, NULL },
+    { IRP_MJ_WRITE, 0, ProtectFile_PreWrite, NULL },
+    { IRP_MJ_SET_INFORMATION, 0, ProtectFile_PreSetInfo, NULL },
+    { IRP_MJ_FILE_SYSTEM_CONTROL, 0, ProtectFile_FileSystemControl, NULL },
+    { IRP_MJ_DEVICE_CONTROL, 0, ProtectBoot_PreDeviceControl, NULL },
+    { IRP_MJ_OPERATION_END }
+};
+
+CONST FLT_REGISTRATION FilterRegistration = {
+    sizeof(FLT_REGISTRATION),
+    FLT_REGISTRATION_VERSION,
+    0,
+    NULL,
+    Callbacks,
+    DriverUnload,
+    InstanceSetup,
+    InstanceQueryTeardown,
+    InstanceTeardownStart,
+    InstanceTeardownComplete,
+    NULL,
+    NULL,
+    NULL
+};
+
+extern "C" NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath) {
+    UNREFERENCED_PARAMETER(RegistryPath);
+
+    NTSTATUS status = STATUS_SUCCESS;
+    PSECURITY_DESCRIPTOR sd = NULL;
+    OBJECT_ATTRIBUTES oa = { 0 };
+    UNICODE_STRING name = { 0 };
+
+    RtlZeroMemory(&GlobalData, sizeof(GlobalData));
+    GlobalData.DriverObject = DriverObject;
+    ExInitializeFastMutex(&GlobalData.PortMutex);
+    ExInitializeFastMutex(&GlobalData.TrackerMutex);
+
+    ExInitializeRundownProtection(&GlobalData.PortRundown);
+
+    status = FltRegisterFilter(DriverObject, &FilterRegistration, &GlobalData.FilterHandle);
+    if (!NT_SUCCESS(status)) return status;
+
+    status = FltBuildDefaultSecurityDescriptor(&sd, FLT_PORT_ALL_ACCESS);
+    if (NT_SUCCESS(status)) {
+        RtlInitUnicodeString(&name, PYAS_PORT_NAME);
+        InitializeObjectAttributes(&oa, &name, OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, NULL, sd);
+        status = FltCreateCommunicationPort(GlobalData.FilterHandle, &GlobalData.ServerPort, &oa, NULL, PortConnect, PortDisconnect, NULL, 1);
+        FltFreeSecurityDescriptor(sd);
+    }
+
+    if (!NT_SUCCESS(status)) {
+        FltUnregisterFilter(GlobalData.FilterHandle);
+        return status;
+    }
+
+    InitializeProcessProtection();
+    InitializeRegistryProtection(DriverObject);
+    PsSetLoadImageNotifyRoutine(ImageLoadNotify);
+
+    return FltStartFiltering(GlobalData.FilterHandle);
+}
\ No newline at end of file
diff --git a/ProtectBoot.cpp b/ProtectBoot.cpp
new file mode 100644
index 0000000..c1a0233
--- /dev/null
+++ b/ProtectBoot.cpp
@@ -0,0 +1,34 @@
+#include "DriverCommon.h"
+
+#ifndef IOCTL_DISK_FORMAT_TRACKS
+#define IOCTL_DISK_FORMAT_TRACKS        CTL_CODE(IOCTL_DISK_BASE, 0x0006, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
+#endif
+#ifndef IOCTL_DISK_FORMAT_TRACKS_EX
+#define IOCTL_DISK_FORMAT_TRACKS_EX     CTL_CODE(IOCTL_DISK_BASE, 0x000b, METHOD_BUFFERED, FILE_READ_ACCESS | FILE_WRITE_ACCESS)
+#endif
+
+FLT_PREOP_CALLBACK_STATUS ProtectBoot_PreDeviceControl(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(CompletionContext);
+
+    if (Data->RequestorMode == KernelMode) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    if (KeGetCurrentIrql() > APC_LEVEL) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    ULONG IoControlCode = Data->Iopb->Parameters.DeviceIoControl.Common.IoControlCode;
+
+    if (IoControlCode == IOCTL_DISK_SET_DRIVE_LAYOUT_EX ||
+        IoControlCode == IOCTL_SCSI_PASS_THROUGH_DIRECT ||
+        IoControlCode == IOCTL_DISK_FORMAT_TRACKS ||
+        IoControlCode == IOCTL_DISK_FORMAT_TRACKS_EX) {
+
+        HANDLE Pid = PsGetCurrentProcessId();
+        if (!IsProcessTrusted(Pid) && !IsInstallerProcess(Pid)) {
+            UNICODE_STRING MsgStr = RTL_CONSTANT_STRING(L"Disk_Wiper_Attempt");
+            SendMessageToUser(4001, (ULONG)(ULONG_PTR)Pid, MsgStr.Buffer, MsgStr.Length);
+            Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+            return FLT_PREOP_COMPLETE;
+        }
+    }
+    return FLT_PREOP_SUCCESS_NO_CALLBACK;
+}
\ No newline at end of file
diff --git a/ProtectFile.cpp b/ProtectFile.cpp
new file mode 100644
index 0000000..1f82bba
--- /dev/null
+++ b/ProtectFile.cpp
@@ -0,0 +1,236 @@
+#include "DriverCommon.h"
+
+static BOOLEAN IsHoneyToken(PUNICODE_STRING Path) {
+    if (!Path || !Path->Buffer) return FALSE;
+    if (WildcardMatch(L"*PYAS_Honey*", Path->Buffer, Path->Length) ||
+        WildcardMatch(L"*Backup_Secret*", Path->Buffer, Path->Length)) {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreCreate(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(CompletionContext);
+
+    if (Data->RequestorMode == KernelMode) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    if (KeGetCurrentIrql() > APC_LEVEL) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    PFLT_FILE_NAME_INFORMATION nameInfo = NULL;
+    UNICODE_STRING FileName = { 0 };
+    NTSTATUS status = STATUS_SUCCESS;
+    FLT_PREOP_CALLBACK_STATUS callbackStatus = FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    status = FltGetFileNameInformation(Data, FLT_FILE_NAME_NORMALIZED | FLT_FILE_NAME_QUERY_DEFAULT, &nameInfo);
+    if (!NT_SUCCESS(status) || !nameInfo) {
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    status = FltParseFileNameInformation(nameInfo);
+    if (!NT_SUCCESS(status)) {
+        FltReleaseFileNameInformation(nameInfo);
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    FileName = nameInfo->Name;
+    if (!FileName.Buffer || FileName.Length == 0) {
+        goto cleanup;
+    }
+
+    HANDLE Pid = PsGetCurrentProcessId();
+    BOOLEAN Trusted = IsProcessTrusted(Pid);
+
+    if (IsHoneyToken(&FileName)) {
+        if (!Trusted) {
+            if (Data->Iopb->Parameters.Create.SecurityContext->DesiredAccess & (FILE_WRITE_DATA | DELETE)) {
+                SendMessageToUser(5001, (ULONG)(ULONG_PTR)Pid, FileName.Buffer, FileName.Length);
+                Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                callbackStatus = FLT_PREOP_COMPLETE;
+                goto cleanup;
+            }
+        }
+    }
+
+    if (WildcardMatch(L"\\Device\\PhysicalDrive*", FileName.Buffer, FileName.Length) ||
+        (WildcardMatch(L"\\Device\\Harddisk*", FileName.Buffer, FileName.Length) && !WildcardMatch(L"*Volume*", FileName.Buffer, FileName.Length))) {
+
+        if (Data->Iopb->Parameters.Create.SecurityContext->DesiredAccess &
+            (FILE_WRITE_DATA | FILE_APPEND_DATA | GENERIC_WRITE | WRITE_DAC | WRITE_OWNER)) {
+
+            if (!Trusted && !IsInstallerProcess(Pid)) {
+                UNICODE_STRING MsgStr = RTL_CONSTANT_STRING(L"Disk_Wiper_Attempt");
+                SendMessageToUser(4001, (ULONG)(ULONG_PTR)Pid, MsgStr.Buffer, MsgStr.Length);
+                Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                callbackStatus = FLT_PREOP_COMPLETE;
+                goto cleanup;
+            }
+        }
+    }
+
+    if (CheckProtectedPathRule(&FileName)) {
+        if (!Trusted) {
+            if (Data->Iopb->Parameters.Create.SecurityContext->DesiredAccess & (FILE_WRITE_DATA | DELETE | WRITE_DAC | GENERIC_WRITE)) {
+                SendMessageToUser(2001, (ULONG)(ULONG_PTR)Pid, FileName.Buffer, FileName.Length);
+                Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                callbackStatus = FLT_PREOP_COMPLETE;
+                goto cleanup;
+            }
+        }
+    }
+
+    if (CheckFileExtensionRule(&FileName)) {
+        if (!Trusted) {
+            if (Data->Iopb->Parameters.Create.SecurityContext->DesiredAccess & (DELETE | FILE_DELETE_CHILD)) {
+                if (CheckRansomActivity(Pid, &FileName, NULL, 0, FALSE)) {
+                    SendMessageToUser(5001, (ULONG)(ULONG_PTR)Pid, FileName.Buffer, FileName.Length);
+                    Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                    callbackStatus = FLT_PREOP_COMPLETE;
+                    goto cleanup;
+                }
+            }
+        }
+    }
+
+cleanup:
+    if (nameInfo) {
+        FltReleaseFileNameInformation(nameInfo);
+    }
+    return callbackStatus;
+}
+
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreSetInfo(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(CompletionContext);
+
+    if (Data->RequestorMode == KernelMode) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    if (KeGetCurrentIrql() > APC_LEVEL) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    FILE_INFORMATION_CLASS infoClass = Data->Iopb->Parameters.SetFileInformation.FileInformationClass;
+
+    if (infoClass != FileDispositionInformation &&
+        infoClass != FileRenameInformation &&
+        infoClass != FileRenameInformationEx) {
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    PFLT_FILE_NAME_INFORMATION nameInfo = NULL;
+    NTSTATUS status = FltGetFileNameInformation(Data, FLT_FILE_NAME_NORMALIZED | FLT_FILE_NAME_QUERY_DEFAULT, &nameInfo);
+
+    if (!NT_SUCCESS(status) || !nameInfo) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    status = FltParseFileNameInformation(nameInfo);
+    if (!NT_SUCCESS(status) || !nameInfo->Name.Buffer) {
+        FltReleaseFileNameInformation(nameInfo);
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    HANDLE Pid = PsGetCurrentProcessId();
+    if (!IsProcessTrusted(Pid)) {
+        if (CheckFileExtensionRule(&nameInfo->Name) || CheckProtectedPathRule(&nameInfo->Name)) {
+            if (CheckRansomActivity(Pid, &nameInfo->Name, NULL, 0, FALSE)) {
+                SendMessageToUser(5001, (ULONG)(ULONG_PTR)Pid, nameInfo->Name.Buffer, nameInfo->Name.Length);
+                Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                FltReleaseFileNameInformation(nameInfo);
+                return FLT_PREOP_COMPLETE;
+            }
+        }
+    }
+
+    if (nameInfo) {
+        FltReleaseFileNameInformation(nameInfo);
+    }
+    return FLT_PREOP_SUCCESS_NO_CALLBACK;
+}
+
+FLT_PREOP_CALLBACK_STATUS ProtectFile_PreWrite(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(CompletionContext);
+
+    if (Data->RequestorMode == KernelMode) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    if (Data->Iopb->IrpFlags & (IRP_PAGING_IO | IRP_SYNCHRONOUS_PAGING_IO | IRP_NOCACHE)) {
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    ULONG WriteLength = Data->Iopb->Parameters.Write.Length;
+    if (WriteLength == 0) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    PFLT_FILE_NAME_INFORMATION nameInfo = NULL;
+    NTSTATUS status = FltGetFileNameInformation(Data, FLT_FILE_NAME_NORMALIZED | FLT_FILE_NAME_QUERY_DEFAULT, &nameInfo);
+
+    FLT_PREOP_CALLBACK_STATUS callbackStatus = FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    if (NT_SUCCESS(status) && nameInfo) {
+        status = FltParseFileNameInformation(nameInfo);
+        if (NT_SUCCESS(status) && nameInfo->Name.Buffer) {
+
+            if (CheckFileExtensionRule(&nameInfo->Name)) {
+                HANDLE Pid = PsGetCurrentProcessId();
+
+                if (!IsProcessTrusted(Pid)) {
+
+                    PVOID SystemBuffer = NULL;
+                    PMDL Mdl = Data->Iopb->Parameters.Write.MdlAddress;
+
+                    if (!Mdl) {
+                        if (Data->Iopb->Parameters.Write.WriteBuffer && KeGetCurrentIrql() <= APC_LEVEL) {
+                            if (NT_SUCCESS(FltLockUserBuffer(Data))) {
+                                Mdl = Data->Iopb->Parameters.Write.MdlAddress;
+                            }
+                        }
+                    }
+
+                    if (Mdl) {
+                        SystemBuffer = MmGetSystemAddressForMdlSafe(Mdl, NormalPagePriority | MdlMappingNoExecute);
+                    }
+
+                    if (SystemBuffer) {
+                        if (CheckRansomActivity(Pid, &nameInfo->Name, SystemBuffer, WriteLength, TRUE)) {
+                            if (!IsInstallerProcess(Pid)) {
+                                SendMessageToUser(5001, (ULONG)(ULONG_PTR)Pid, nameInfo->Name.Buffer, nameInfo->Name.Length);
+                                Data->IoStatus.Status = STATUS_ACCESS_DENIED;
+                                callbackStatus = FLT_PREOP_COMPLETE;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        FltReleaseFileNameInformation(nameInfo);
+    }
+    return callbackStatus;
+}
+
+FLT_PREOP_CALLBACK_STATUS ProtectFile_FileSystemControl(PFLT_CALLBACK_DATA Data, PCFLT_RELATED_OBJECTS FltObjects, PVOID* CompletionContext) {
+    UNREFERENCED_PARAMETER(FltObjects);
+    UNREFERENCED_PARAMETER(CompletionContext);
+
+    if (Data->Iopb->Parameters.FileSystemControl.Common.FsControlCode != FSCTL_MANAGE_BYPASS_IO) {
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    PFS_BPIO_INPUT InputBuffer = (PFS_BPIO_INPUT)Data->Iopb->Parameters.FileSystemControl.Neither.InputBuffer;
+    if (!InputBuffer) return FLT_PREOP_SUCCESS_NO_CALLBACK;
+
+    __try {
+        if (InputBuffer->Operation == FS_BPIO_OP_ENABLE) {
+            PFLT_FILE_NAME_INFORMATION nameInfo = NULL;
+            if (NT_SUCCESS(FltGetFileNameInformation(Data, FLT_FILE_NAME_NORMALIZED | FLT_FILE_NAME_QUERY_DEFAULT, &nameInfo)) && nameInfo) {
+                if (NT_SUCCESS(FltParseFileNameInformation(nameInfo))) {
+                    if (CheckFileExtensionRule(&nameInfo->Name) || CheckProtectedPathRule(&nameInfo->Name)) {
+
+                        Data->IoStatus.Status = STATUS_NOT_SUPPORTED;
+                        FltReleaseFileNameInformation(nameInfo);
+                        return FLT_PREOP_COMPLETE;
+                    }
+                }
+                FltReleaseFileNameInformation(nameInfo);
+            }
+        }
+    }
+    __except (EXCEPTION_EXECUTE_HANDLER) {
+        return FLT_PREOP_SUCCESS_NO_CALLBACK;
+    }
+
+    return FLT_PREOP_SUCCESS_NO_CALLBACK;
+}
\ No newline at end of file
diff --git a/ProtectProcess.cpp b/ProtectProcess.cpp
new file mode 100644
index 0000000..8fed8fd
--- /dev/null
+++ b/ProtectProcess.cpp
@@ -0,0 +1,86 @@
+#include "DriverCommon.h"
+
+PVOID ObRegistrationHandle = NULL;
+OB_CALLBACK_REGISTRATION ObRegistration;
+OB_OPERATION_REGISTRATION ObCallbacks[1];
+
+static BOOLEAN IsSystemImage(PUNICODE_STRING FullImageName) {
+    if (!FullImageName || !FullImageName->Buffer) return FALSE;
+
+    if (WildcardMatch(L"*\\Windows\\System32\\*", FullImageName->Buffer, FullImageName->Length) ||
+        WildcardMatch(L"*\\Windows\\SysWOW64\\*", FullImageName->Buffer, FullImageName->Length) ||
+        WildcardMatch(L"*\\Windows\\WinSxS\\*", FullImageName->Buffer, FullImageName->Length)) {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+VOID ImageLoadNotify(PUNICODE_STRING FullImageName, HANDLE ProcessId, PIMAGE_INFO ImageInfo) {
+    UNREFERENCED_PARAMETER(ImageInfo);
+
+    if (KeGetCurrentIrql() > APC_LEVEL) return;
+    if (!FullImageName || !FullImageName->Buffer) return;
+    if (ProcessId == (HANDLE)0) return;
+
+    if (IsSystemImage(FullImageName)) return;
+
+    if (IsTargetProtected(ProcessId)) {
+        if (CheckFileExtensionRule(FullImageName)) {
+            SendMessageToUser(6001, (ULONG)(ULONG_PTR)ProcessId, FullImageName->Buffer, FullImageName->Length);
+        }
+    }
+}
+
+static OB_PREOP_CALLBACK_STATUS PreOpenProcess(PVOID RegistrationContext, POB_PRE_OPERATION_INFORMATION OperationInformation) {
+    UNREFERENCED_PARAMETER(RegistrationContext);
+
+    if (OperationInformation->KernelHandle) return OB_PREOP_SUCCESS;
+
+    PEPROCESS TargetProcess = (PEPROCESS)OperationInformation->Object;
+    if (!TargetProcess) return OB_PREOP_SUCCESS;
+
+    HANDLE TargetPid = PsGetProcessId(TargetProcess);
+    HANDLE SourcePid = PsGetCurrentProcessId();
+
+    if (SourcePid == TargetPid) return OB_PREOP_SUCCESS;
+    if (IsProcessTrusted(SourcePid)) return OB_PREOP_SUCCESS;
+
+    // Low frequency path, acceptable to check installer here
+    if (IsInstallerProcess(SourcePid)) return OB_PREOP_SUCCESS;
+
+    BOOLEAN bProtected = IsTargetProtected(TargetPid);
+
+    if (bProtected) {
+        ACCESS_MASK DenyMask = PROCESS_TERMINATE | PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_CREATE_THREAD | PROCESS_VM_READ | PROCESS_DUP_HANDLE;
+
+        OperationInformation->Parameters->CreateHandleInformation.DesiredAccess &= ~DenyMask;
+        OperationInformation->Parameters->CreateHandleInformation.OriginalDesiredAccess &= ~DenyMask;
+    }
+
+    return OB_PREOP_SUCCESS;
+}
+
+NTSTATUS InitializeProcessProtection() {
+    static UNICODE_STRING Altitude = { 0 };
+    RtlInitUnicodeString(&Altitude, L"320000");
+
+    ObCallbacks[0].ObjectType = PsProcessType;
+    ObCallbacks[0].Operations = OB_OPERATION_HANDLE_CREATE | OB_OPERATION_HANDLE_DUPLICATE;
+    ObCallbacks[0].PreOperation = PreOpenProcess;
+    ObCallbacks[0].PostOperation = NULL;
+
+    ObRegistration.Version = OB_FLT_REGISTRATION_VERSION;
+    ObRegistration.OperationRegistrationCount = 1;
+    ObRegistration.Altitude = Altitude;
+    ObRegistration.RegistrationContext = NULL;
+    ObRegistration.OperationRegistration = ObCallbacks;
+
+    return ObRegisterCallbacks(&ObRegistration, &ObRegistrationHandle);
+}
+
+VOID UninitializeProcessProtection() {
+    if (ObRegistrationHandle) {
+        ObUnRegisterCallbacks(ObRegistrationHandle);
+        ObRegistrationHandle = NULL;
+    }
+}
\ No newline at end of file
diff --git a/ProtectRegistry.cpp b/ProtectRegistry.cpp
new file mode 100644
index 0000000..fc0c29a
--- /dev/null
+++ b/ProtectRegistry.cpp
@@ -0,0 +1,51 @@
+#include "DriverCommon.h"
+
+LARGE_INTEGER Cookie;
+
+static NTSTATUS RegistryCallback(PVOID CallbackContext, PVOID Argument1, PVOID Argument2) {
+    UNREFERENCED_PARAMETER(CallbackContext);
+
+    if (KeGetCurrentIrql() > APC_LEVEL) return STATUS_SUCCESS;
+
+    REG_NOTIFY_CLASS Class = (REG_NOTIFY_CLASS)(ULONG_PTR)Argument1;
+
+    if (Class == RegNtPreSetValueKey || Class == RegNtPreDeleteKey || Class == RegNtPreCreateKey) {
+        REG_SET_VALUE_KEY_INFORMATION* Info = (REG_SET_VALUE_KEY_INFORMATION*)Argument2;
+        PCUNICODE_STRING KeyName = NULL;
+
+        if (!NT_SUCCESS(CmCallbackGetKeyObjectIDEx(&Cookie, Info->Object, NULL, &KeyName, 0))) {
+            return STATUS_SUCCESS;
+        }
+
+        if (KeyName && KeyName->Buffer) {
+            if (CheckRegistryRule(KeyName)) {
+                HANDLE Pid = PsGetCurrentProcessId();
+                if (!IsProcessTrusted(Pid)) {
+                    if (!IsInstallerProcess(Pid)) {
+                        SendMessageToUser(3001, (ULONG)(ULONG_PTR)Pid, KeyName->Buffer, KeyName->Length);
+                        CmCallbackReleaseKeyObjectIDEx(KeyName);
+                        return STATUS_ACCESS_DENIED;
+                    }
+                }
+            }
+        }
+
+        if (KeyName) {
+            CmCallbackReleaseKeyObjectIDEx(KeyName);
+        }
+    }
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS InitializeRegistryProtection(PDRIVER_OBJECT DriverObject) {
+    UNICODE_STRING Altitude;
+    RtlInitUnicodeString(&Altitude, L"320000");
+    return CmRegisterCallbackEx(RegistryCallback, &Altitude, DriverObject, NULL, &Cookie, NULL);
+}
+
+VOID UninitializeRegistryProtection() {
+    if (Cookie.QuadPart != 0) {
+        CmUnRegisterCallback(Cookie);
+        Cookie.QuadPart = 0;
+    }
+}
\ No newline at end of file
diff --git a/ProtectRules.cpp b/ProtectRules.cpp
new file mode 100644
index 0000000..49da682
--- /dev/null
+++ b/ProtectRules.cpp
@@ -0,0 +1,474 @@
+#include "DriverCommon.h"
+
+constexpr auto MAX_TRACKERS = 64;
+constexpr auto RANSOM_TIME_WINDOW_MS = 3000;
+constexpr auto RANSOM_COUNT_THRESHOLD = 5;
+constexpr auto HIGH_ENTROPY_THRESHOLD = 15;
+
+typedef struct _RANSOM_TRACKER {
+    HANDLE ProcessId;
+    ULONG ActivityCount;
+    LARGE_INTEGER LastActivityTime;
+} RANSOM_TRACKER, * PRANSOM_TRACKER;
+
+RANSOM_TRACKER RansomTrackers[MAX_TRACKERS];
+
+static BOOLEAN HasSuffix(PCUNICODE_STRING String, PCWSTR Suffix) {
+    if (!String || !String->Buffer || !Suffix) return FALSE;
+
+    SIZE_T SuffixLenBytes = 0;
+    while (Suffix[SuffixLenBytes / sizeof(WCHAR)] != L'\0') {
+        SuffixLenBytes += sizeof(WCHAR);
+    }
+
+    if (String->Length < SuffixLenBytes) return FALSE;
+
+    UNICODE_STRING SuffixPart{};
+    SuffixPart.Buffer = (PWCH)((PUCHAR)String->Buffer + String->Length - SuffixLenBytes);
+    SuffixPart.Length = (USHORT)SuffixLenBytes;
+    SuffixPart.MaximumLength = (USHORT)SuffixLenBytes;
+
+    UNICODE_STRING TargetSuffix;
+    RtlInitUnicodeString(&TargetSuffix, Suffix);
+
+    return RtlEqualUnicodeString(&SuffixPart, &TargetSuffix, TRUE);
+}
+
+BOOLEAN WildcardMatch(PCWSTR Pattern, PCWSTR String, USHORT StringLengthBytes) {
+    if (!Pattern || !String) return FALSE;
+
+    PCWSTR mp = NULL;
+    PCWSTR cp = NULL;
+    PCWSTR StringEnd = (PCWSTR)((PUCHAR)String + StringLengthBytes);
+
+    while ((PUCHAR)String < (PUCHAR)StringEnd) {
+        WCHAR pChar = *Pattern;
+        WCHAR sChar = *String;
+
+        if (pChar == L'*') {
+            if (!*++Pattern) return TRUE;
+            mp = Pattern;
+            cp = String + 1;
+        }
+        else if ((RtlDowncaseUnicodeChar(pChar) == RtlDowncaseUnicodeChar(sChar)) || pChar == L'?') {
+            Pattern++;
+            String++;
+        }
+        else if (mp) {
+            Pattern = mp;
+            String = cp++;
+        }
+        else {
+            return FALSE;
+        }
+    }
+
+    while (*Pattern == L'*') Pattern++;
+    return !*Pattern && ((PUCHAR)String >= (PUCHAR)StringEnd);
+}
+
+const PCWSTR RegistryBlockList[] = {
+    L"\\REGISTRY\\MACHINE\\BCD00000000\\*",
+    L"\\REGISTRY\\MACHINE\\SAM\\*",
+    L"\\REGISTRY\\MACHINE\\SECURITY\\*",
+    L"\\REGISTRY\\USER\\*_Classes\\*\\shell\\open\\command\\*",
+    L"\\REGISTRY\\USER\\S-1-*\\SOFTWARE\\NetWire\\*",
+    L"\\REGISTRY\\USER\\S-1-*\\SOFTWARE\\Remcos*\\*",
+    L"\\REGISTRY\\USER\\S-1-*\\SOFTWARE\\DC3_FEXEC\\*",
+    L"*\\DisableAntiSpyware",
+    L"*\\DisableWindowsUpdateAccess",
+    L"*\\EnableLUA",
+    L"*\\ConsentPromptBehaviorAdmin",
+    L"*\\NoControlPanel",
+    L"*\\NoDrives",
+    L"*\\NoFileMenu",
+    L"*\\NoFind",
+    L"*\\NoStartMenuPinnedList",
+    L"*\\NoSetFolders",
+    L"*\\NoSetFolderOptions",
+    L"*\\NoViewOnDrive",
+    L"*\\NoClose",
+    L"*\\NoDesktop",
+    L"*\\NoLogoff",
+    L"*\\NoFolderOptions",
+    L"*\\RestrictRun",
+    L"*\\NoViewContextMenu",
+    L"*\\HideClock",
+    L"*\\NoStartMenuMyGames",
+    L"*\\NoStartMenuMyMusic",
+    L"*\\DisableCMD",
+    L"*\\NoAddingComponents",
+    L"*\\NoWinKeys",
+    L"*\\NoStartMenuLogOff",
+    L"*\\NoSimpleNetIDList",
+    L"*\\NoLowDiskSpaceChecks",
+    L"*\\DisableLockWorkstation",
+    L"*\\Restrict_Run",
+    L"*\\DisableTaskMgr",
+    L"*\\DisableRegistryTools",
+    L"*\\DisableChangePassword",
+    L"*\\Wallpaper",
+    L"*\\NoComponents",
+    L"*\\NoStartMenuMorePrograms",
+    L"*\\NoActiveDesktop",
+    L"*\\NoSetActiveDesktop",
+    L"*\\NoRecentDocsMenu",
+    L"*\\NoWindowsUpdate",
+    L"*\\NoChangeStartMenu",
+    L"*\\NoFavoritesMenu",
+    L"*\\NoRecentDocsHistory",
+    L"*\\NoSetTaskbar",
+    L"*\\NoSMHelp",
+    L"*\\NoTrayContextMenu",
+    L"*\\NoManageMyComputerVerb",
+    L"*\\NoRealMode",
+    L"*\\NoRun",
+    L"*\\ClearRecentDocsOnExit",
+    L"*\\NoActiveDesktopChanges",
+    L"*\\NoStartMenuNetworkPlaces",
+    L"*\\NoLockScreen",
+    L"*\\HideFastUserSwitching",
+    L"*\\ConsentPromptBehaviorUser",
+    L"*\\EnableSecureUIAPaths",
+    L"*\\NoSRM",
+    L"*\\NoInteractiveServices",
+    L"*\\ShutdownWithoutLogon",
+    L"*\\AutoAdminLogon",
+    L"*\\ImagePath",
+    L"*\\BootExecute",
+    L"*\\SubSystems",
+    L"*\\FirmwareBootDevice",
+    L"*\\BootDriverFlags",
+    L"*\\SystemStartOptions",
+    L"*\\CrashDumpEnabled",
+    L"*\\DisableAutomaticRestartOnFailure",
+    L"*\\SystemBiosVersion",
+    L"*\\NoTheme",
+    L"*\\PendingFileRenameOperations",
+    L"*\\SystemSetupInProgress",
+    L"*\\CmdLine",
+    L"*\\SetupType",
+    L"*\\AutoReboot",
+    L"*\\Userinit",
+    L"*\\UIHost",
+    L"*\\Debugger",
+    L"*\\DefaultUserName",
+    L"*\\DefaultPassword",
+    L"*\\AltDefaultUserName",
+    L"*\\AltDefaultPassword",
+    L"*\\DisableCAD",
+    L"*\\LegalNoticeCaption",
+    L"*\\LegalNoticeText",
+    L"*\\Run",
+    L"*\\RunOnce",
+    L"*\\Image File Execution Options\\*"
+};
+
+const PCWSTR DangerousExtensions[] = {
+    L".exe", L".dll", L".sys", L".com", L".scr",
+    L".zip", L".7z", L".rar", L".tar", L".gz",
+    L".js", L".bat", L".cmd", L".ps1", L".vbs",
+    L".ppt", L".pptx", L".wps", L".txt", L".rtf",
+    L".pdf", L".xls", L".xlsx", L".doc", L".docx",
+    L".jpg", L".jpeg", L".png", L".webp", L".gif",
+    L".mp3", L".wav", L".aac", L".ogg", L".flac",
+    L".mp4", L".avi", L".mov", L".wmv", L".mkv",
+    L".aux", L".cur", L".mui", L".ttf", L".efi"
+};
+
+const PCWSTR NaturallyCompressedExtensions[] = {
+    L".zip", L".7z", L".rar", L".tar", L".gz",
+    L".jpg", L".jpeg", L".png", L".webp", L".gif",
+    L".mp3", L".wav", L".aac", L".ogg", L".flac",
+    L".mp4", L".avi", L".mov", L".wmv", L".mkv",
+    L".exe", L".dll", L".sys", L".mui",
+    L".docx", L".xlsx", L".pptx", L".odt", L".ods"
+};
+
+const PCWSTR ProtectedPaths[] = {
+    L"*\\System32\\drivers\\etc\\hosts",
+    L"*\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\*",
+    L"\\Device\\HarddiskVolume*\\Windows\\System32\\*.exe",
+    L"\\Device\\HarddiskVolume*\\Windows\\System32\\*.dll",
+    L"\\Device\\HarddiskVolume*\\Windows\\SysWOW64\\*.exe",
+    L"\\Device\\HarddiskVolume*\\Windows\\SysWOW64\\*.dll",
+    L"\\Device\\HarddiskVolume*\\bootmgr",
+    L"\\Device\\HarddiskVolume*\\EFI\\*",
+    L"*\\PYAS.exe",
+    L"*\\PYAS_Driver.sys"
+};
+
+const PCWSTR TrustedInstallerNames[] = {
+    L"TrustedInstaller.exe",
+    L"msiexec.exe",
+    L"svchost.exe",
+    L"TiWorker.exe",
+    L"taskhostw.exe"
+};
+
+BOOLEAN IsProcessTrusted(HANDLE ProcessId) {
+    if ((ULONG)(ULONG_PTR)ProcessId == GlobalData.PyasPid) return TRUE;
+    if (ProcessId == (HANDLE)4) return TRUE;
+    return FALSE;
+}
+
+BOOLEAN IsTargetProtected(HANDLE ProcessId) {
+    if ((ULONG)(ULONG_PTR)ProcessId == GlobalData.PyasPid) return TRUE;
+    return FALSE;
+}
+
+BOOLEAN IsInstallerProcess(HANDLE ProcessId) {
+    if (KeGetCurrentIrql() > APC_LEVEL) return FALSE;
+
+    NTSTATUS status;
+    BOOLEAN isTrusted = FALSE;
+    PEPROCESS Process = NULL;
+    PUNICODE_STRING imageFileName = NULL;
+
+    status = PsLookupProcessByProcessId(ProcessId, &Process);
+    if (!NT_SUCCESS(status)) return FALSE;
+
+    status = SeLocateProcessImageName(Process, &imageFileName);
+
+    if (NT_SUCCESS(status) && imageFileName) {
+        if (imageFileName->Buffer) {
+            for (int i = 0; i < sizeof(TrustedInstallerNames) / sizeof(TrustedInstallerNames[0]); i++) {
+                if (HasSuffix(imageFileName, TrustedInstallerNames[i])) {
+                    isTrusted = TRUE;
+                    break;
+                }
+            }
+        }
+
+        ExFreePool(imageFileName);
+    }
+
+    ObDereferenceObject(Process);
+    return isTrusted;
+}
+
+BOOLEAN CheckRegistryRule(PCUNICODE_STRING KeyName) {
+    if (!KeyName || !KeyName->Buffer) return FALSE;
+    for (int i = 0; i < sizeof(RegistryBlockList) / sizeof(RegistryBlockList[0]); i++) {
+        if (WildcardMatch(RegistryBlockList[i], KeyName->Buffer, KeyName->Length)) return TRUE;
+    }
+    return FALSE;
+}
+
+BOOLEAN CheckFileExtensionRule(PCUNICODE_STRING FileName) {
+    if (!FileName || !FileName->Buffer) return FALSE;
+
+    for (int i = 0; i < sizeof(DangerousExtensions) / sizeof(DangerousExtensions[0]); i++) {
+        if (HasSuffix(FileName, DangerousExtensions[i])) {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+BOOLEAN CheckProtectedPathRule(PCUNICODE_STRING FileName) {
+    if (!FileName || !FileName->Buffer) return FALSE;
+
+    for (int i = 0; i < sizeof(ProtectedPaths) / sizeof(ProtectedPaths[0]); i++) {
+        if (WildcardMatch(ProtectedPaths[i], FileName->Buffer, FileName->Length)) return TRUE;
+    }
+    return FALSE;
+}
+
+static BOOLEAN IsHighEntropy(PVOID Buffer, ULONG Length) {
+    if (!Buffer || Length < 256) return FALSE;
+
+    ULONG Histogram[256] = { 0 };
+    PUCHAR Ptr = (PUCHAR)Buffer;
+    ULONG ScanLen = (Length > 1024) ? 1024 : Length;
+
+    __try {
+        for (ULONG i = 0; i < ScanLen; i++) {
+            Histogram[Ptr[i]]++;
+        }
+    }
+    __except (EXCEPTION_EXECUTE_HANDLER) {
+        return FALSE;
+    }
+
+    ULONG MaxFreq = 0;
+    for (int i = 0; i < 256; i++) {
+        if (Histogram[i] > MaxFreq) MaxFreq = Histogram[i];
+    }
+
+    ULONG ExpectedAvg = ScanLen / 256;
+    if (MaxFreq < (ExpectedAvg + HIGH_ENTROPY_THRESHOLD)) {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+static BOOLEAN IsNaturallyCompressed(PCUNICODE_STRING FileName) {
+    if (!FileName || !FileName->Buffer) return FALSE;
+
+    for (int i = 0; i < sizeof(NaturallyCompressedExtensions) / sizeof(NaturallyCompressedExtensions[0]); i++) {
+        if (HasSuffix(FileName, NaturallyCompressedExtensions[i])) {
+            return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+static BOOLEAN IsNoisyRansomPath(PCUNICODE_STRING FileName) {
+    if (!FileName || !FileName->Buffer) return FALSE;
+
+    if (WildcardMatch(L"*\\Windows\\Temp\\*", FileName->Buffer, FileName->Length) ||
+        WildcardMatch(L"*\\AppData\\Local\\*", FileName->Buffer, FileName->Length) ||
+        WildcardMatch(L"*\\Windows\\SystemTemp\\*", FileName->Buffer, FileName->Length) ||
+        WildcardMatch(L"*$Recycle.Bin*", FileName->Buffer, FileName->Length)) {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+static BOOLEAN IsExplorerProcess(HANDLE ProcessId) {
+    if (KeGetCurrentIrql() > APC_LEVEL) return FALSE;
+
+    NTSTATUS status;
+    BOOLEAN isExplorer = FALSE;
+    PEPROCESS Process = NULL;
+    PUNICODE_STRING imageFileName = NULL;
+
+    status = PsLookupProcessByProcessId(ProcessId, &Process);
+    if (!NT_SUCCESS(status)) return FALSE;
+
+    status = SeLocateProcessImageName(Process, &imageFileName);
+
+    if (NT_SUCCESS(status) && imageFileName) {
+        if (imageFileName->Buffer) {
+            if (HasSuffix(imageFileName, L"explorer.exe")) {
+                isExplorer = TRUE;
+            }
+        }
+        ExFreePool(imageFileName);
+    }
+
+    ObDereferenceObject(Process);
+    return isExplorer;
+}
+
+BOOLEAN CheckRansomActivity(HANDLE ProcessId, PUNICODE_STRING FileName, PVOID Buffer, ULONG Length, BOOLEAN IsWrite) {
+    if (IsNoisyRansomPath(FileName)) return FALSE;
+
+    if (!IsWrite) {
+        if (IsExplorerProcess(ProcessId)) {
+            return FALSE;
+        }
+    }
+
+    LARGE_INTEGER Now = { 0 };
+    KeQuerySystemTime(&Now);
+    BOOLEAN Result = FALSE;
+    BOOLEAN SuspiciousWrite = FALSE;
+
+    if (IsWrite && Buffer && Length > 0) {
+        if (!IsNaturallyCompressed(FileName) && IsHighEntropy(Buffer, Length)) {
+            SuspiciousWrite = TRUE;
+        }
+    }
+
+    ExAcquireFastMutex(&GlobalData.TrackerMutex);
+
+    if (IsWrite && !SuspiciousWrite) {
+        ExReleaseFastMutex(&GlobalData.TrackerMutex);
+        return FALSE;
+    }
+
+    PRANSOM_TRACKER Tracker = NULL;
+    PRANSOM_TRACKER EmptySlot = NULL;
+
+    for (int i = 0; i < MAX_TRACKERS; i++) {
+        if (RansomTrackers[i].ProcessId == ProcessId) {
+            Tracker = &RansomTrackers[i];
+            break;
+        }
+        if (RansomTrackers[i].ProcessId == NULL && !EmptySlot) {
+            EmptySlot = &RansomTrackers[i];
+        }
+    }
+
+    if (!Tracker) {
+        if (EmptySlot) {
+            Tracker = EmptySlot;
+            Tracker->ProcessId = ProcessId;
+            Tracker->ActivityCount = 0;
+            Tracker->LastActivityTime = Now;
+        }
+        else {
+            ExReleaseFastMutex(&GlobalData.TrackerMutex);
+            return FALSE;
+        }
+    }
+
+    LARGE_INTEGER Diff = { 0 };
+    Diff.QuadPart = Now.QuadPart - Tracker->LastActivityTime.QuadPart;
+
+    if (Diff.QuadPart > (RANSOM_TIME_WINDOW_MS * 10000LL)) {
+        Tracker->ActivityCount = 0;
+        Tracker->LastActivityTime = Now;
+    }
+
+    ULONG Weight = 1;
+    if (IsWrite) {
+        Weight = SuspiciousWrite ? 2 : 1;
+    }
+
+    Tracker->ActivityCount += Weight;
+
+    if (Tracker->ActivityCount >= RANSOM_COUNT_THRESHOLD) {
+        Result = TRUE;
+    }
+
+    ExReleaseFastMutex(&GlobalData.TrackerMutex);
+    return Result;
+}
+
+NTSTATUS SendMessageToUser(ULONG Code, ULONG Pid, PWCHAR Path, USHORT PathSize) {
+    if (KeGetCurrentIrql() > APC_LEVEL) return STATUS_UNSUCCESSFUL;
+
+    PYAS_MESSAGE msg;
+    RtlZeroMemory(&msg, sizeof(msg));
+    msg.MessageCode = Code;
+    msg.ProcessId = Pid;
+
+    if (Path && PathSize > 0) {
+        size_t MaxSize = sizeof(msg.Path) - sizeof(WCHAR);
+        size_t BytesToCopy = PathSize;
+        if (BytesToCopy > MaxSize) {
+            BytesToCopy = MaxSize;
+        }
+
+        __try {
+            RtlCopyMemory(msg.Path, Path, BytesToCopy);
+        }
+        __except (EXCEPTION_EXECUTE_HANDLER) {
+            return STATUS_ACCESS_VIOLATION;
+        }
+        msg.Path[BytesToCopy / sizeof(WCHAR)] = L'\0';
+    }
+
+    if (!ExAcquireRundownProtection(&GlobalData.PortRundown)) {
+        return STATUS_PORT_DISCONNECTED;
+    }
+
+    NTSTATUS status = STATUS_SUCCESS;
+
+    if (GlobalData.ClientPort) {
+        LARGE_INTEGER timeout{};
+        timeout.QuadPart = -(5 * 10000);
+        PFLT_PORT Port = GlobalData.ClientPort;
+
+        status = FltSendMessage(GlobalData.FilterHandle, &Port, &msg, sizeof(msg), NULL, NULL, &timeout);
+    }
+    else {
+        status = STATUS_PORT_DISCONNECTED;
+    }
+
+    ExReleaseRundownProtection(&GlobalData.PortRundown);
+    return status;
+}
\ No newline at end of file