DDK版本的进程/线程监视器

时间:2022-12-24 20:12:47
编写进程/线程监视器


Author  : sinister
Email   : sinister@whitecell.org
HomePage: http://www.whitecell.org

(首先说明一下。有不少朋友来信问一些进程/线程监视工具是如何实现的。
我写出来是为了让那些朋友有进一步的了解,也省的我一封封的回MAIL。如果您
是 NT DRIVER熟手,那么此文提到的方法您可能早已掌握,完全可以略过不看。)

  有时候我们希望能够动态监视系统中任意进程/线程的创建与销毁。为了达
到此目的我翻阅了 DDK 手册,发现其提供的 PsSetCreateProcessNotifyRoutine(),
PsSetCreateThreadNotifyRoutine(),等函数可以实现此功能。这两个函数可以
通过向系统注册一个 CALLBALCK 函数来监视进程/线程等操作。函数原形如下:

NTSTATUS
  PsSetCreateProcessNotifyRoutine(
  IN PCREATE_PROCESS_NOTIFY_ROUTINE  NotifyRoutine,
  IN BOOLEAN  Remove
  );

VOID
(*PCREATE_PROCESS_NOTIFY_ROUTINE) (
    IN HANDLE  ParentId,
    IN HANDLE  ProcessId,
    IN BOOLEAN  Create
    );


NTSTATUS
  PsSetCreateThreadNotifyRoutine(
  IN PCREATE_THREAD_NOTIFY_ROUTINE  NotifyRoutine
  );

VOID
(*PCREATE_THREAD_NOTIFY_ROUTINE) (
    IN HANDLE  ProcessId,
    IN HANDLE  ThreadId,
    IN BOOLEAN  Create
    );


通过原形可以看出,其 CALLBACK 函数只提供了进程ID/线程ID。并没有提供
进程名。那么我们要进一步通过进程ID来获取进程名。这需要用到一个未公开
的函数 PsLookupProcessByProcessId()。函数原形如下:

NTSTATUS PsLookupProcessByProcessId(
     IN ULONG ulProcId,
     OUT PEPROCESS * pEProcess
     );

函数输出的 EPROCESS 结构也是未公开的内核进程结构,很多人称其为 KPEB。
EPROCESS 结构中的偏移 0x1FC 指向当前进程名的偏移。(这个结构虽然可以在
驱动程序中直接使用。但没有公布其结构,网上有不少高手已将其结构给出。有
兴趣可以自行搜索,或去 IFS DDK 中获取,这里因为结构太长,就不贴出来了)
有了这个结构我们就可以从中得到进程名。NT系统还提供了一个函数可以动态监
视进程装载映像。此函数可以得到进程加栽时所调用的 DLL 名称与全路径,还有
一些映像信息。为我们获得更详细的进程装载信息提供了更好的帮助。

函数原形如下:

NTSTATUS
  PsSetLoadImageNotifyRoutine(
  IN PLOAD_IMAGE_NOTIFY_ROUTINE  NotifyRoutine
  );

VOID
(*PLOAD_IMAGE_NOTIFY_ROUTINE) (
    IN PUNICODE_STRING  FullImageName,
    IN HANDLE  ProcessId, // where image is mapped
    IN PIMAGE_INFO  ImageInfo
    );

typedef struct  _IMAGE_INFO {
    union {
        ULONG  Properties;
        struct {
            ULONG ImageAddressingMode  : 8; //code addressing mode
            ULONG SystemModeImage      : 1; //system mode image
            ULONG ImageMappedToAllPids : 1; //mapped in all processes
            ULONG Reserved             : 22;
        };
    };
    PVOID  ImageBase;
    ULONG  ImageSelector;
    ULONG  ImageSize;
    ULONG  ImageSectionNumber;
} IMAGE_INFO, *PIMAGE_INFO;

利用以上提供的函数与结构,我们便能实现一个进程/线程监视器。下面这段
代码演示了如何实现此功能。


/*****************************************************************
文件名        : WssProcMon.c
描述          : 进程/线程监视器
作者          : sinister
最后修改日期  : 2002-11-02

*****************************************************************/

#include "ntddk.h"
#include "string.h"

#define ProcessNameOffset  0x1fc

static NTSTATUS  MydrvDispatch (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp);
NTSTATUS PsLookupProcessByProcessId(IN ULONG ulProcId, OUT PEPROCESS * pEProcess);
VOID ProcessCreateMon ( IN HANDLE  hParentId, IN HANDLE PId,IN BOOLEAN bCreate);
VOID ThreadCreateMon (IN HANDLE  PId, IN HANDLE TId, IN BOOLEAN  bCreate);
VOID ImageCreateMon (IN PUNICODE_STRING  FullImageName, IN HANDLE  ProcessId, IN PIMAGE_INFO  ImageInfo );


// 驱动入口
NTSTATUS  DriverEntry( IN PDRIVER_OBJECT DriverObject,  IN PUNICODE_STRING RegistryPath )
{
    
    UNICODE_STRING  nameString, linkString;
    PDEVICE_OBJECT  deviceObject;
    NTSTATUS        status;
    int                i;
    

    //建立设备
    RtlInitUnicodeString( &nameString, L"//Device//WssProcMon" );
    
    status = IoCreateDevice( DriverObject,
                             0,
                             &nameString,
                             FILE_DEVICE_UNKNOWN,
                             0,
                             TRUE,
                             &deviceObject
                           );
                          

    if (!NT_SUCCESS( status ))
        return status;
    

    RtlInitUnicodeString( &linkString, L"//DosDevices//WssProcMon" );

    status = IoCreateSymbolicLink (&linkString, &nameString);

    if (!NT_SUCCESS( status ))
    {
        IoDeleteDevice (DriverObject->DeviceObject);
        return status;
    }    
    
    status = PsSetLoadImageNotifyRoutine(ImageCreateMon);
    if (!NT_SUCCESS( status ))
    {
        DbgPrint("PsSetLoadImageNotifyRoutine()/n");
        return status;
    }    

    status = PsSetCreateThreadNotifyRoutine(ThreadCreateMon);
    if (!NT_SUCCESS( status ))
    {
        DbgPrint("PsSetCreateThreadNotifyRoutine()/n");
        return status;
    }    

    status = PsSetCreateProcessNotifyRoutine(ProcessCreateMon, FALSE);
    if (!NT_SUCCESS( status ))
    {
        DbgPrint("PsSetCreateProcessNotifyRoutine()/n");
        return status;
    }    
    

    for ( i = 0; i < IRP_MJ_MAXIMUM_FUNCTION; i++)    {

          DriverObject->MajorFunction[i] = MydrvDispatch;
    }
    
  return STATUS_SUCCESS;

}



//处理设备对象操作

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


VOID ProcessCreateMon ( IN HANDLE hParentId, IN HANDLE PId,IN BOOLEAN bCreate )
{

    PEPROCESS  EProcess;
    ULONG      ulCurrentProcessId;
    LPTSTR       lpCurProc;
    NTSTATUS   status;

    status = PsLookupProcessByProcessId( (ULONG)PId, &EProcess);
    if (!NT_SUCCESS( status ))
    {
        DbgPrint("PsLookupProcessByProcessId()/n");
        return ;
    }
    

    if ( bCreate )
    {
          lpCurProc = (LPTSTR)EProcess;
        lpCurProc = lpCurProc + ProcessNameOffset;

        DbgPrint( "CREATE PROCESS = PROCESS NAME: %s , PROCESS PARENTID: %d, PROCESS ID: %d, PROCESS ADDRESS %x:/n",
                              lpCurProc,
                              hParentId,
                              PId,
                              EProcess );
    }
    
    else
    {

        DbgPrint( "TERMINATED == PROCESS ID: %d/n", PId);

    }

}

VOID ThreadCreateMon (IN HANDLE PId, IN HANDLE TId, IN BOOLEAN  bCreate)
{

    PEPROCESS   EProcess;
    ULONG        ulCurrentProcessId;
    LPTSTR        lpCurProc;
    NTSTATUS    status;

    status = PsLookupProcessByProcessId( (ULONG)PId, &EProcess);
    if (!NT_SUCCESS( status ))
    {
        DbgPrint("PsLookupProcessByProcessId()/n");
        return ;
    }    

    if ( bCreate )
    {
          lpCurProc    = (LPTSTR)EProcess;
        lpCurProc    = lpCurProc + ProcessNameOffset;

        DbgPrint( "CREATE THREAD = PROCESS NAME: %s PROCESS ID: %d, THREAD ID: %d/n", lpCurProc, PId, TId );
                              
    }
    
    else
    {

        DbgPrint( "TERMINATED == THREAD ID: %d/n", TId);

    }

}

VOID ImageCreateMon (IN PUNICODE_STRING  FullImageName, IN HANDLE  ProcessId, IN PIMAGE_INFO  ImageInfo )
{
    DbgPrint("FullImageName: %S,Process ID: %d/n",FullImageName->Buffer,ProcessId);
    DbgPrint("ImageBase: %x,ImageSize: %d/n",ImageInfo->ImageBase,ImageInfo->ImageSize);