关于CreateRemoteThread,VirtualAllocEx .....来帮忙啊.

jlum99 2003-08-11 06:12:43

CreateRemoteThread
函数原型
HANDLE CreateRemoteThread(
HANDLE hProcess, // handle to process
LPSECURITY_ATTRIBUTES lpThreadAttributes, // SD
SIZE_T dwStackSize, // initial stack size
LPTHREAD_START_ROUTINE lpStartAddress, // thread function
LPVOID lpParameter, // thread argument
DWORD dwCreationFlags, // creation option
LPDWORD lpThreadId // thread identifier
);
hProcess
[输入] 进程句柄
lpThreadAttributes
[输入] 线程安全描述字，指向SECURITY_ATTRIBUTES结构的指针
dwStackSize
[输入] 线程栈大小，以字节表示
lpStartAddress
[输入] 一个LPTHREAD_START_ROUTINE类型的指针，指向在远程进程中执行的函数地址
lpParameter
[输入] 传入参数
dwCreationFlags
[输入] 创建线程的其它标志

lpThreadId
[输出] 线程身份标志，如果为NULL,则不返回

在VB调用中 hProcess参数传入的是用OpenProcess得到的进程id,lpThreadAttributes ,dwStackSize 传入0&,lpStartAddress 传入的是LoadLibrayW函数在kernel32中的地址.lpParameter 传入的是个地址,这个地址位于hProcess进程空间中,通过VirtualAllocEx 函数返回的.问题是函数调用总是不成功,lpParameter 是个long 型.在使用CopyMemory函数时如下这样就可以实现指针
dim x as long ,xaddress as long ,y as long
x=34
xaddress=VarPtr(x)
CopyMemory y , byval xaddress , 2
运行后 y=34 但是必须使用byval关键字,但在使用CreateRemoteThread时似乎不太好使
不知道哪位仁兄有好的手段........谢谢.

...全文

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bbe 2003-08-12

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Option Explicit

Private Const PROCESS_CREATE_THREAD = &H2
Private Const PROCESS_QUERY_INFORMATION = &H400
Private Const PROCESS_VM_WRITE = &H20
Private Const PROCESS_VM_OPERATION = &H8
Private Const MEM_COMMIT = &H1000
Private Const MEM_RELEASE = &H8000
Private Const PAGE_READWRITE = &H4
Private Const INFINITE = &HFFFFFFFF

Private Declare Function VirtualAllocEx Lib "kernel32" (ByVal hProcess As Long, _
lpAddress As Any, _
ByVal dwSize As Long, _
ByVal flAllocationType As Long, _
ByVal flProtect As Long) As Long
Private Declare Function VirtualFreeEx Lib "kernel32" (ByVal hProcess As Long, _
lpAddress As Any, _
ByVal dwSize As Long, _
ByVal dwFreeType As Long) As Long
Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, lpBaseAddress As Any, lpBuffer As Any, ByVal nSize As Long, lpNumberOfBytesWritten As Long) As Long
Private Declare Function GetModuleHandle Lib "kernel32" Alias "GetModuleHandleA" (ByVal lpModuleName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Private Declare Function CreateRemoteThread Lib "kernel32" (ByVal hProcess As Long, lpThreadAttributes As Any, ByVal dwStackSize As Long, lpStartAddress As Long, lpParameter As Any, ByVal dwCreationFlags As Long, lpThreadId As Long) As Long
Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Long, ByVal dwMilliseconds As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function lstrlen Lib "kernel32" Alias "lstrlenA" (ByVal lpString As String) As Long

Private Sub InjectLibA(ByVal dwProcessId As Long, ByVal pszLibFile As String)
Dim hProcess As Long, hThread As Long
Dim pszLibFileRemote As Long

On Error GoTo errhandle
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION Or _
PROCESS_CREATE_THREAD Or _
PROCESS_VM_OPERATION Or _
PROCESS_VM_WRITE, _
0, dwProcessId)
If hProcess = 0 Then GoTo errhandle

Dim cch As Long, cb As Long

cch = 1 + LenB(StrConv(pszLibFile, vbFromUnicode))
cb = cch

pszLibFileRemote = VirtualAllocEx(hProcess, 0&, cb, MEM_COMMIT, PAGE_READWRITE)
If pszLibFileRemote = 0 Then GoTo errhandle

If (WriteProcessMemory(hProcess, pszLibFileRemote, ByVal pszLibFile, cb, ByVal 0&) = 0) Then GoTo errhandle

Dim pfnThreadRtn As Long

pfnThreadRtn = GetProcAddress(GetModuleHandle("Kernel32"), "LoadLibraryA")
If pfnThreadRtn = 0 Then GoTo errhandle

hThread = CreateRemoteThread(hProcess, ByVal 0&, 0&, ByVal pfnThreadRtn, pszLibFileRemote, 0, ByVal 0&)
If (hThread = 0) Then GoTo errhandle

WaitForSingleObject hThread, INFINITE

errhandle:
If pszLibFileRemote <> 0 Then _
VirtualFreeEx hProcess, pszLibFileRemote, 0, MEM_RELEASE

If hThread <> 0 Then _
CloseHandle hThread

If hProcess <> 0 Then _
CloseHandle hProcess
End Sub

Private Sub Command1_Click()
InjectLibA CLng(Text1.Text), GetAppPath & "22 ImgWalk.dll"
End Sub

Private Function GetAppPath() As String
GetAppPath = IIf(Right$(App.Path, 1) <> "\", App.Path & "\", App.Path)
End Function

jlum99 2003-08-12

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我的程序大体也都是这样的，但是感觉问题总出在CreateRemoteThread上。没有用到copymemory函数，本身例子就是讲打破进程壁垒的，我说copymemory函数，只是拿来做个比较，就是关于参数传递的问题。bbe 仁兄的程序比较贴近书上写的，试试看，好用结帖。至于 zyl910(910：分儿，我又来了！) 说的，必须ThreadProc类型函数的地址好象没什么关系，因为lpStartAddress函数是通GetProcAddress函数得到的。有个问题就是C里的NULL为什么要用byval 0&代替？？

jlum99 2003-08-12