[内核驱动]Minifilter实现指定扩展名文件拒绝访问
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转载:http://blog.csdn.net/C0ldstudy/article/details/51585708
转载:http://blog.csdn.net/zj510/article/details/39344889
转载:http://blog.csdn.net/zj510/article/details/39345479
转载:http://www.cnblogs.com/js2854/archive/2010/11/03/HideDir.html
转载:http://blog.csdn.net/Z18_28_19/article/details/12979743
转载:https://bbs.pediy.com/thread-192118.htm
转载:http://blog.csdn.net/u013761036/article/details/63254697
转载:http://www.cnblogs.com/js2854/archive/2011/04/03/sysload.html
转载:http://www.cnblogs.com/huangyong9527/archive/2012/09/07/2674720.html
转载:http://blog.csdn.net/xum2008/article/details/5634903
一.环境配置
VS2012 + WDK 8.0
WDK下载地址:https://developer.microsoft.com/zh-cn/windows/hardware/windows-driver-kit
二.安装WDK
这样WDK就集成到VS里面
三.创建文件过滤驱动工程
建立工程后,首先会有两个工程,一个就是驱动工程,另外一个是package工程(这个是测试驱动安装的一个工程,对于我们来说其实没有什么用处,反正本人是没有使用过得,可以直接删除)。
NTSTATUS DriverEntry (_In_ PDRIVER_OBJECT DriverObject,_In_ PUNICODE_STRING RegistryPath),这个类似C语言里面的main函数,这是驱动内核的入口函数
DriverEntry函数中,通过FltRegisterFilter注册一个微过滤器;另一个是用FltStartFiltering开始过滤。FltRegisterFilter函数通过输入驱动对象和注册信息的结构返回微过滤器句柄,而FltStartFiltering函数实现开启过滤功能
NTSTATUS DriverEntry ( __in PDRIVER_OBJECT DriverObject, __in PUNICODE_STRING RegistryPath ) { NTSTATUS status; PSECURITY_DESCRIPTOR sd; OBJECT_ATTRIBUTES oa; UNICODE_STRING uniString; UNREFERENCED_PARAMETER( RegistryPath ); //向过滤管理器注册一个过滤器 status = FltRegisterFilter( DriverObject, &FilterRegistration, &gFilterHandle ); ASSERT( NT_SUCCESS( status ) ); //开启过滤行为 if (NT_SUCCESS( status )) { status = FltStartFiltering( gFilterHandle ); //如果开启失败,取消注册 if (!NT_SUCCESS( status )) { FltUnregisterFilter( gFilterHandle ); } } status=FltBuildDefaultSecurityDescriptor(&sd,FLT_PORT_ALL_ACCESS); RtlInitUnicodeString( &uniString, MINISPY_PORT_NAME ); InitializeObjectAttributes( &oa, &uniString, OBJ_KERNEL_HANDLE|OBJ_CASE_INSENSITIVE, NULL, sd ); FltFreeSecurityDescriptor( sd ); return status; }
在注册过滤器时,使用了微过滤器注册结构,也就是FLT_REGISTRATION。
CONST FLT_REGISTRATION FilterRegistration = { sizeof( FLT_REGISTRATION ), // Size FLT_REGISTRATION_VERSION, // Version 0, // Flags NULL, // Context Callbacks, // Operation callbacks MyMiniFilterUnload, // MiniFilterUnload MyMiniFilterInstanceSetup, // InstanceSetup MyMiniFilterInstanceQueryTeardown, // InstanceQueryTeardown MyMiniFilterInstanceTeardownStart, // InstanceTeardownStart MyMiniFilterInstanceTeardownComplete, // InstanceTeardownComplete NULL, // GenerateFileName NULL, // GenerateDestinationFileName NULL // NormalizeNameComponent };
CallBacks最为重要,这是一个回调函数组,其中可以处理各种请求。请求过滤分为2种:请求完成之前操作和等待请求完成之后操作,分别在预操作回调和后操作回调函数中。CallBacks回调函数数组如下:
当系统接收到标识为IRP_MJ_CREATE的IPR也就是试图生成或者打开文件时,自然就会调用到预操作函数与后操作函数。
我们启用一个Write的过滤,如:
CONST FLT_OPERATION_REGISTRATION Callbacks[] = { { IRP_MJ_WRITE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, #if 0 // TODO - List all of the requests to filter. { IRP_MJ_CREATE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_CREATE_NAMED_PIPE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_CLOSE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_READ, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_WRITE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_QUERY_INFORMATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SET_INFORMATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_QUERY_EA, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SET_EA, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_FLUSH_BUFFERS, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_QUERY_VOLUME_INFORMATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SET_VOLUME_INFORMATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_DIRECTORY_CONTROL, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_FILE_SYSTEM_CONTROL, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_DEVICE_CONTROL, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_INTERNAL_DEVICE_CONTROL, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SHUTDOWN, 0, MyMiniFilterPreOperationNoPostOperation, NULL }, //post operations not supported { IRP_MJ_LOCK_CONTROL, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_CLEANUP, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_CREATE_MAILSLOT, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_QUERY_SECURITY, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SET_SECURITY, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_QUERY_QUOTA, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_SET_QUOTA, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_PNP, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_ACQUIRE_FOR_SECTION_SYNCHRONIZATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_RELEASE_FOR_SECTION_SYNCHRONIZATION, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_ACQUIRE_FOR_MOD_WRITE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_RELEASE_FOR_MOD_WRITE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_ACQUIRE_FOR_CC_FLUSH, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_RELEASE_FOR_CC_FLUSH, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_FAST_IO_CHECK_IF_POSSIBLE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_NETWORK_QUERY_OPEN, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_MDL_READ, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_MDL_READ_COMPLETE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_PREPARE_MDL_WRITE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_MDL_WRITE_COMPLETE, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_VOLUME_MOUNT, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, { IRP_MJ_VOLUME_DISMOUNT, 0, MyMiniFilterPreOperation, MyMiniFilterPostOperation }, #endif // TODO { IRP_MJ_OPERATION_END } };
预操作回调函数:MyMiniFilterPreOperation函数第一个参数是回调数据包的指针,其中包含这个请求相关的全部信息。
FLT_PREOP_CALLBACK_STATUS MyMiniFilterPreOperation ( _Inout_ PFLT_CALLBACK_DATA Data, _In_ PCFLT_RELATED_OBJECTS FltObjects, _Flt_CompletionContext_Outptr_ PVOID *CompletionContext ) { char FileName[260] = "X:";//记录文件名 char FilePath[260] = "Y:";//记录相对路径(ParentDir) char Ext[260] = "Z:";//记录扩展名 NTSTATUS status; UNICODE_STRING uniString; PEPROCESS pEprocess = 0; PUNICODE_STRING uSProcessPath = NULL; PFLT_FILE_NAME_INFORMATION nameInfo; UNREFERENCED_PARAMETER( FltObjects ); UNREFERENCED_PARAMETER( CompletionContext ); PAGED_CODE(); __try { status = FltGetFileNameInformation( Data,FLT_FILE_NAME_NORMALIZED|FLT_FILE_NAME_QUERY_DEFAULT, &nameInfo ); if (NT_SUCCESS( status )) { //DbgPrint("进入了\\r\\n"); FltParseFileNameInformation( nameInfo ); if (NPUnicodeStringToChar(&nameInfo->Name, FileName)) { if (NPUnicodeStringToChar(&nameInfo->ParentDir, FilePath)){ //输出文件名及相对路径 DbgPrint("文件名:%s\\r\\n",FileName); DbgPrint("文件路径:%s\\r\\n",FilePath); //输出扩展名 NPUnicodeStringToChar(&nameInfo->Extension,Ext); DbgPrint("文件扩展名:%s\\r\\n",Ext); // pEprocess = Data->Thread ? IoThreadToProcess(Data->Thread) : PsGetCurrentProcess(); //uSProcessPath = PsGetProcessFullName(pEprocess);//这里需要释放UNICODESTRING 的内存 GetSeLocateProcessImageName(pEprocess,&uSProcessPath); DbgPrint("ProcFullName : %wZ\\n", uSProcessPath); //判断文件路径或名字是否符合要求,若是满足要求则拒绝访问 if (strstr(FileName, "txt") > 0) { Data->iostatus.Status = STATUS_ACCESS_DENIED; Data->IoStatus.Information = 0; FltReleaseFileNameInformation( nameInfo ); return FLT_PREOP_COMPLETE; } } FltReleaseFileNameInformation( nameInfo ); } }} __except(EXCEPTION_EXECUTE_HANDLER) { DbgPrint("NPPreCreate EXCEPTION_EXECUTE_HANDLER\\n"); } return FLT_PREOP_SUCCESS_WITH_CALLBACK; }
在预操作函数里,我用到NPUnicodeStringToChar函数和GetSeLocateProcessImageName,在此一并贴出来
BOOLEAN NPUnicodeStringToChar(PUNICODE_STRING UniName, char Name[]) { ANSI_STRING AnsiName; NTSTATUS ntstatus; char* nameptr; __try { ntstatus = RtlUnicodeStringToAnsiString(&AnsiName, UniName, TRUE); if (AnsiName.Length < 260) { nameptr = (PCHAR)AnsiName.Buffer; //Convert into upper case and copy to buffer //strcpy(Name, _strupr(nameptr)); //将字符串转换成大写形式 strcpy(Name,_strlwr(nameptr));//讲字符串转换成小写形式 DbgPrint("NPUnicodeStringToChar : %s\\n", Name); } RtlFreeAnsiString(&AnsiName); } __except(EXCEPTION_EXECUTE_HANDLER) { DbgPrint("NPUnicodeStringToChar EXCEPTION_EXECUTE_HANDLER\\n"); return FALSE; } return TRUE; } //获取进程全路径 PUNICODE_STRING GetSeLocateProcessImageName(PEPROCESS Process,PUNICODE_STRING *pImageFileName) { POBJECT_NAME_INFORMATION pProcessImageName = NULL; PUNICODE_STRING pTempUS = NULL; ULONG NameLength = 0; //Process->SeAuditProcessCreationInfo.ImageFileName->Name //win7 x86 offset = 0x1ec //if (NULL == Process->SeAuditProcessCreationInfo.ImageFileName) pProcessImageName = (POBJECT_NAME_INFORMATION)(*(ULONG*)((ULONG)Process + 0x1ec)); if(pProcessImageName == NULL) { DbgPrint("Process->SeAuditProcessCreationInfo.ImageFileName == NULL \\n"); return NULL; } else { NameLength = sizeof(UNICODE_STRING) + pProcessImageName->Name.MaximumLength; pTempUS = ExAllocatePoolWithTag( NonPagedPool, NameLength, \'aPeS\' ); if (NULL != pTempUS) { RtlCopyMemory( pTempUS, &pProcessImageName->Name, NameLength ); pTempUS->Buffer = (PWSTR)(((PUCHAR) pTempUS) + sizeof(UNICODE_STRING)); *pImageFileName = pTempUS; DbgPrint("Path:%wZ\\n",&pProcessImageName->Name); return *pImageFileName; } return NULL; } }
后操作回调函数:在一般的情况下,后操作回调函数在文件新建不成功的时候取消之前的操作,本次项目中没有相关实践,就没有做过多的修改和研究。
FLT_POSTOP_CALLBACK_STATUS MiniFilterPostOperation ( _Inout_ PFLT_CALLBACK_DATA Data, _In_ PCFLT_RELATED_OBJECTS FltObjects, _In_opt_ PVOID CompletionContext, _In_ FLT_POST_OPERATION_FLAGS Flags ) { UNREFERENCED_PARAMETER( Data ); UNREFERENCED_PARAMETER( FltObjects ); UNREFERENCED_PARAMETER( CompletionContext ); UNREFERENCED_PARAMETER( Flags ); PT_DBG_PRINT( PTDBG_TRACE_ROUTINES, ("MiniFilter!MiniFilterPostOperation: Entered\\n") ); return FLT_POSTOP_FINISHED_PROCESSING; }
好了,选择Win 7 Debug直接编译。
然后。。。。 报错了,没有关系,查看出错原因,无外乎一些警告被当做错误,或者一些函数参数没有被使用,导致编译不过,这些都是因为安全警告等级太高了,我们的解决方法:
然后把MyMinifilter.inf和MyMiniFilter.sys考到虚拟机上。注意VS2012不支持了XP了,所以我们找一个win7 32位虚拟机。因为win7 64位虚拟机需要签名,为了省去签名这一步,先用win7 32位
右键点击inf文件安装。之后运行cmd,(注意需要用Administrator运行)。输入命令sc start myminifilter
这样就可以把minifilter驱动起来。
我们需要查看驱动运行过程的打印信息,用DebugView这个软件。
用Administrator运行DebugView(注意勾上Enable verbose kernel output)这样我们用start,stop命令的时候就可以看到一下log
可是实际情况却没有看到log。这个是因为inf文件需要稍微改一下。
修改inf文件
现在暂时只需要修改Altitude,看下图,其实就是把注释掉的代码启用。
再次安装驱动运行驱动服务,用记事本打开一个txt文本
可见阻止txt格式的文件打开了。
后记:当下次打开虚拟机时,发现驱动不拦截了,原来是我驱动开始类型默认是SERVICE_DEMAND_START,这种是按需启动的驱动程序
SERVICE_SYSTEM_START 是随着操作系统启动而启动,如果想要驱动下次系统启动还生效,可以选择这种类型。
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