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Driver.c
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Driver.c
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/* Cheat that uses a driver for reading / writing virtual memory,
instead of using Win32API Functions. Written By Zer0Mem0ry,
https://www.youtube.com/watch?v=sJdBtPosWQs */
#include "ntos.h"
// Request to read virtual user memory (memory of a program) from kernel space
#define IO_READ_REQUEST CTL_CODE(FILE_DEVICE_UNKNOWN, 0x0701 /* Our Custom Code */, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
// Request to write virtual user memory (memory of a program) from kernel space
#define IO_WRITE_REQUEST CTL_CODE(FILE_DEVICE_UNKNOWN, 0x0702 /* Our Custom Code */, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
// Request to retrieve the process id of csgo process, from kernel space
#define IO_GET_ID_REQUEST CTL_CODE(FILE_DEVICE_UNKNOWN, 0x0703 /* Our Custom Code */, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
// Request to retrieve the base address of client.dll in csgo.exe from kernel space
#define IO_GET_MODULE_REQUEST CTL_CODE(FILE_DEVICE_UNKNOWN, 0x0704 /* Our Custom Code */, METHOD_BUFFERED, FILE_SPECIAL_ACCESS)
PDEVICE_OBJECT pDeviceObject; // our driver object
UNICODE_STRING dev, dos; // Driver registry paths
ULONG csgoId, ClientAddress;
// datatype for read request
typedef struct _KERNEL_READ_REQUEST
{
ULONG ProcessId;
ULONG Address;
ULONG Response;
ULONG Size;
} KERNEL_READ_REQUEST, *PKERNEL_READ_REQUEST;
typedef struct _KERNEL_WRITE_REQUEST
{
ULONG ProcessId;
ULONG Address;
ULONG Value;
ULONG Size;
} KERNEL_WRITE_REQUEST, *PKERNEL_WRITE_REQUEST;
NTSTATUS UnloadDriver(PDRIVER_OBJECT pDriverObject);
NTSTATUS CreateCall(PDEVICE_OBJECT DeviceObject, PIRP irp);
NTSTATUS CloseCall(PDEVICE_OBJECT DeviceObject, PIRP irp);
NTSTATUS KeReadVirtualMemory(PEPROCESS Process, PVOID SourceAddress, PVOID TargetAddress, SIZE_T Size)
{
PSIZE_T Bytes;
if (NT_SUCCESS(MmCopyVirtualMemory(Process, SourceAddress, PsGetCurrentProcess(),
TargetAddress, Size, KernelMode, &Bytes)))
return STATUS_SUCCESS;
else
return STATUS_ACCESS_DENIED;
}
NTSTATUS KeWriteVirtualMemory(PEPROCESS Process, PVOID SourceAddress, PVOID TargetAddress, SIZE_T Size)
{
PSIZE_T Bytes;
if (NT_SUCCESS(MmCopyVirtualMemory(PsGetCurrentProcess(), SourceAddress, Process,
TargetAddress, Size, KernelMode, &Bytes)))
return STATUS_SUCCESS;
else
return STATUS_ACCESS_DENIED;
}
// set a callback for every PE image loaded to user memory
// then find the client.dll & csgo.exe using the callback
PLOAD_IMAGE_NOTIFY_ROUTINE ImageLoadCallback(PUNICODE_STRING FullImageName,
HANDLE ProcessId, PIMAGE_INFO ImageInfo)
{
// Compare our string to input
if (wcsstr(FullImageName->Buffer, L"\\csgo\\bin\\client.dll")) {
// if it matches
DbgPrintEx(0, 0, "Loaded Name: %ls \n", FullImageName->Buffer);
DbgPrintEx(0, 0, "Loaded To Process: %d \n", ProcessId);
ClientAddress = ImageInfo->ImageBase;
csgoId = ProcessId;
}
}
// IOCTL Call Handler function
NTSTATUS IoControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
NTSTATUS Status;
ULONG BytesIO = 0;
PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);
// Code received from user space
ULONG ControlCode = stack->Parameters.DeviceIoControl.IoControlCode;
if (ControlCode == IO_READ_REQUEST)
{
// Get the input buffer & format it to our struct
PKERNEL_READ_REQUEST ReadInput = (PKERNEL_READ_REQUEST)Irp->AssociatedIrp.SystemBuffer;
PKERNEL_READ_REQUEST ReadOutput = (PKERNEL_READ_REQUEST)Irp->AssociatedIrp.SystemBuffer;
PEPROCESS Process;
// Get our process
if (NT_SUCCESS(PsLookupProcessByProcessId(ReadInput->ProcessId, &Process)))
KeReadVirtualMemory(Process, ReadInput->Address,
&ReadInput->Response, ReadInput->Size);
DbgPrintEx(0, 0, "Read Params: %lu, %#010x \n", ReadInput->ProcessId, ReadInput->Address);
DbgPrintEx(0, 0, "Value: %lu \n", ReadOutput->Response);
Status = STATUS_SUCCESS;
BytesIO = sizeof(KERNEL_READ_REQUEST);
}
else if (ControlCode == IO_WRITE_REQUEST)
{
// Get the input buffer & format it to our struct
PKERNEL_WRITE_REQUEST WriteInput = (PKERNEL_WRITE_REQUEST)Irp->AssociatedIrp.SystemBuffer;
PEPROCESS Process;
// Get our process
if (NT_SUCCESS(PsLookupProcessByProcessId(WriteInput->ProcessId, &Process)))
KeWriteVirtualMemory(Process, &WriteInput->Value,
WriteInput->Address, WriteInput->Size);
DbgPrintEx(0, 0, "Write Params: %lu, %#010x \n", WriteInput->Value, WriteInput->Address);
Status = STATUS_SUCCESS;
BytesIO = sizeof(KERNEL_WRITE_REQUEST);
}
else if (ControlCode == IO_GET_ID_REQUEST)
{
PULONG OutPut = (PULONG)Irp->AssociatedIrp.SystemBuffer;
*OutPut = csgoId;
DbgPrintEx(0, 0, "id get %#010x", csgoId);
Status = STATUS_SUCCESS;
BytesIO = sizeof(*OutPut);
}
else if (ControlCode == IO_GET_MODULE_REQUEST)
{
PULONG OutPut = (PULONG)Irp->AssociatedIrp.SystemBuffer;
*OutPut = ClientAddress;
DbgPrintEx(0, 0, "Module get %#010x", ClientAddress);
Status = STATUS_SUCCESS;
BytesIO = sizeof(*OutPut);
}
else
{
// if the code is unknown
Status = STATUS_INVALID_PARAMETER;
BytesIO = 0;
}
// Complete the request
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = BytesIO;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return Status;
}
// Driver Entrypoint
NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject,
PUNICODE_STRING pRegistryPath)
{
DbgPrintEx(0, 0, "Driver Loaded\n");
PsSetLoadImageNotifyRoutine(ImageLoadCallback);
RtlInitUnicodeString(&dev, L"\\Device\\kernelhop");
RtlInitUnicodeString(&dos, L"\\DosDevices\\kernelhop");
IoCreateDevice(pDriverObject, 0, &dev, FILE_DEVICE_UNKNOWN, FILE_DEVICE_SECURE_OPEN, FALSE, &pDeviceObject);
IoCreateSymbolicLink(&dos, &dev);
pDriverObject->MajorFunction[IRP_MJ_CREATE] = CreateCall;
pDriverObject->MajorFunction[IRP_MJ_CLOSE] = CloseCall;
pDriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = IoControl;
pDriverObject->DriverUnload = UnloadDriver;
pDeviceObject->Flags |= DO_DIRECT_IO;
pDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
return STATUS_SUCCESS;
}
NTSTATUS UnloadDriver(PDRIVER_OBJECT pDriverObject)
{
DbgPrintEx(0, 0, "Unload routine called.\n");
PsRemoveLoadImageNotifyRoutine(ImageLoadCallback);
IoDeleteSymbolicLink(&dos);
IoDeleteDevice(pDriverObject->DeviceObject);
}
NTSTATUS CreateCall(PDEVICE_OBJECT DeviceObject, PIRP irp)
{
irp->IoStatus.Status = STATUS_SUCCESS;
irp->IoStatus.Information = 0;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
NTSTATUS CloseCall(PDEVICE_OBJECT DeviceObject, PIRP irp)
{
irp->IoStatus.Status = STATUS_SUCCESS;
irp->IoStatus.Information = 0;
IoCompleteRequest(irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}