一个小型的用于监视进程产生和撤销驱动逆向分析

一个小型的用于监视进程产生和撤销驱动逆向分析



前两天,闪电狼兄给了一个Themida_1.0.0.5加壳的新版绝影凯旋vip1.65,
狼把它目录中一个驱动NTProcDrv.sys让偶分析分析,注意这不是Themida_1.0.0.5驱动,不过它也保护这Themida加壳的主程序.早前错认了!

由于偶是菜鸟加壳盲.只好"雾"里看花去捏裸笨的NTProcDrv.sys.

作者声明: 只是感兴趣，没有其他目的。失误之处敬请诸位大侠赐教!
由于我误解了狼兄错认它是Themida的驱动.错误改过来了!
西裤兄,不过代码全部是自己逆地.原来有开源的.



逆向一下:

1:设备对象自定义扩展结构体如下:
typedef struct _DeviceExtension {  
          ULONG size;         //0x0        
          PHANDLE EventHandle; //0x04
          PRKEVENT KernelEvent;   //+0x08
          HANDLE ParentId;     //+0x0C
          HANDLE ProcessId;   //+0x010
          ULONG IsCreate;     //+0x014
          } NTProcDrvDeviceExtension;

2:IRP_MJ_DEVICE_CONTROL中是点关键东东.

3:IoCreateNotificationEvent 建立事件通知与下面的回调和exe交互

4:PsSetCreateProcessNotifyRoutine 进程事件回调

由于偶是菜鸟加壳盲,不敢碰Themida_1.0.0.5加壳的EXE.只好找软肋逆.
代码如下:

//////////////////////////////////////////////////////////////////////////////
//       *       NTProcDrv.sys         *    
//       *   be reversed by qiweixue[BCG]   *
//       *   CopyRight:http://www.pediy.com   *  
/////////////////////////////////////////////////////////////////////////////

#include <ntddk.h>
#define NTProcDrv_IOCTL_METHOD_BUFFERED 0x22E000

typedef struct _DeviceExtension {  
          ULONG size;         //0x0        
          PHANDLE EventHandle; //0x04
          PRKEVENT KernelEvent;   //+0x08
          HANDLE ParentId;     //+0x0C
          HANDLE ProcessId;   //+0x010
          ULONG IsCreate;     //+0x014
          } NTProcDrvDeviceExtension;

         
VOID
NTProcDrvUnloadDriver(
  IN PDRIVER_OBJECT     DriverObject
  );
 
NTSTATUS  
NTProcDrvCreateClose(
  IN PDEVICE_OBJECT DeviceObject,
  IN PIRP Irp
  );
   
NTSTATUS
NTProcDeviceControl(
  IN PDEVICE_OBJECT DeviceObject,
  IN PIRP Irp
  );
   
VOID
NTProcDrvNotifyRoutine (
  IN HANDLE ParentId,
  IN HANDLE ProcessId,
  IN BOOLEAN Create
  );


UNICODE_STRING DeviceNameString;  
UNICODE_STRING LinkDeviceNameString;  
UNICODE_STRING EventDeviceNameString;
PDEVICE_OBJECT GloalDeviceObject;

NTSTATUS
DriverEntry(
  IN PDRIVER_OBJECT DriverObject,
  IN PUNICODE_STRING RegistryPath
  )

{
 
  HANDLE HEventHandle;
  PKEVENT PEnvent;
PDEVICE_OBJECT deviceObject = NULL;
NTSTATUS ntStatus;
NTProcDrvDeviceExtension     *DevExt=NULL;

RtlInitUnicodeString( &DeviceNameString,   L"//Device//NTProcDrv" );
RtlInitUnicodeString( &LinkDeviceNameString,L"//DosDevices//NTProcDrv");

ntStatus = IoCreateDevice(
          DriverObject,
          sizeof(NTProcDrvDeviceExtension),              
          &DeviceNameString,
          FILE_DEVICE_UNKNOWN,
          0,
          FALSE,
          &deviceObject );

  if (!NT_SUCCESS( ntStatus ))
  {

    return ntStatus;
  }

  ntStatus = IoCreateSymbolicLink(
          (PUNICODE_STRING) &LinkDeviceNameString,
          (PUNICODE_STRING) &DeviceNameString
          );

  if (!NT_SUCCESS(ntStatus))
  {
    IoDeleteDevice(deviceObject);
    return ntStatus;
  }
  GloalDeviceObject=deviceObject;
  DriverObject->DriverUnload =NTProcDrvUnloadDriver;
 
  DriverObject->MajorFunction[IRP_MJ_CREATE] = NTProcDrvCreateClose;
  DriverObject->MajorFunction[IRP_MJ_CLOSE] = NTProcDrvCreateClose;
  DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = NTProcDeviceControl;  
 
  RtlInitUnicodeString(&EventDeviceNameString,L"//BaseNamedObjects//NTProcDrvProcessEvent");
 
  PEnvent=IoCreateNotificationEvent(
                &EventDeviceNameString,
                DevExt->EventHandle
                );  
  DevExt=(NTProcDrvDeviceExtension*)(deviceObject->DeviceExtension);
  DevExt->KernelEvent=PEnvent;
  KeClearEvent(DevExt->KernelEvent);
 
  ntStatus= PsSetCreateProcessNotifyRoutine((PCREATE_PROCESS_NOTIFY_ROUTINE)NTProcDrvNotifyRoutine,0);
 
  return ntStatus;
}


void
NTProcDrvUnloadDriver(
  IN PDRIVER_OBJECT DriverObject
  )
{
  PDEVICE_OBJECT deviceObject = DriverObject->DeviceObject;
  IoDeleteSymbolicLink( &LinkDeviceNameString );
  if ( deviceObject != NULL )
  {
    IoDeleteDevice( deviceObject );
  }
}

NTSTATUS
NTProcDrvCreateClose(
  IN PDEVICE_OBJECT DeviceObject,
  IN PIRP Irp
  )  
{
  Irp->IoStatus.Status = STATUS_SUCCESS;  
  Irp->IoStatus.Information = 0;
  IoCompleteRequest( Irp, IO_NO_INCREMENT );
  return STATUS_SUCCESS;
}

NTSTATUS
NTProcDeviceControl(
  IN PDEVICE_OBJECT DeviceObject,
  IN PIRP Irp
  )
{  

  NTSTATUS ntStatus;
  ULONG   IoCtlCode;
  PIO_STACK_LOCATION IrpStack;
  ULONG           inBufLength;
  ULONG           outBufLength;
  PVOID           InOutBuf;
  NTProcDrvDeviceExtension     *DevExt=NULL;

  ntStatus=STATUS_UNSUCCESSFUL;
  IrpStack = IoGetCurrentIrpStackLocation(Irp);//+60
  outBufLength = IrpStack->Parameters.DeviceIoControl.OutputBufferLength;//+4
  inBufLength = IrpStack->Parameters.DeviceIoControl.InputBufferLength;//+8
  IoCtlCode =IrpStack->Parameters.DeviceIoControl.IoControlCode; //C
  InOutBuf = Irp->AssociatedIrp.SystemBuffer;  
  switch(IoCtlCode)
  {
 
  case NTProcDrv_IOCTL_METHOD_BUFFERED:

      if(outBufLength<0x0C)break;
      DevExt=(NTProcDrvDeviceExtension*)DeviceObject->DeviceExtension;
    *((PLONG)InOutBuf)=(ULONG) (DevExt->ParentId);
    *((PLONG)InOutBuf+1)=(ULONG)(DevExt->ProcessId);
    *((PLONG)InOutBuf+2)=(char)(DevExt->IsCreate);
      ntStatus=STATUS_SUCCESS;
  break;

default:
    Irp->IoStatus.Status = ntStatus;
    if(!NT_SUCCESS(ntStatus))
      {
      Irp->IoStatus.Information = outBufLength;
      }  
  Irp->IoStatus.Information = outBufLength;      
  }

  IofCompleteRequest(Irp,IO_NO_INCREMENT);
 
  return ntStatus;
}
 
void
NTProcDrvNotifyRoutine (
  IN HANDLE ParentId,
  IN HANDLE ProcessId,
  IN BOOLEAN Create
  )
{

  PDEVICE_OBJECT deviceObject=NULL;
  NTProcDrvDeviceExtension *DevExt=NULL;
  deviceObject=GloalDeviceObject;
DevExt=deviceObject->DeviceExtension;
  DevExt->ParentId=ParentId;
  DevExt->ProcessId=ProcessId;
  DevExt->IsCreate=(char)Create;
  KeSetEvent(DevExt->KernelEvent,0,0);
  KeClearEvent(DevExt->KernelEvent);
return ;
}
   
欢迎找bug.idb文件.c文件,源驱动都在附件中.