Injector Source Code

  Public Class Form1
    Private TargetProcessHandle As Integer
    Private pfnStartAddr As Integer
    Private pszLibFileRemote As String
    Private TargetBufferSize As Integer
    Public Const PROCESS_VM_READ = &H10
    Public Const TH32CS_SNAPPROCESS = &H2
    Public Const MEM_COMMIT = 4096
    Public Const PAGE_READWRITE = 4
    Public Const PROCESS_CREATE_THREAD = (&H2)
    Public Const PROCESS_VM_OPERATION = (&H8)
    Public Const PROCESS_VM_WRITE = (&H20)
    Public Declare Function ReadProcessMemory Lib "kernel32" ( _
    ByVal hProcess As Integer, _
    ByVal lpBaseAddress As Integer, _
    ByVal lpBuffer As String, _
    ByVal nSize As Integer, _
    ByRef lpNumberOfBytesWritten As Integer) As Integer
    Public Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" ( _
    ByVal lpLibFileName As String) As Integer
    Public Declare Function VirtualAllocEx Lib "kernel32" ( _
    ByVal hProcess As Integer, _
    ByVal lpAddress As Integer, _
    ByVal dwSize As Integer, _
    ByVal flAllocationType As Integer, _
    ByVal flProtect As Integer) As Integer
    Public Declare Function WriteProcessMemory Lib "kernel32" ( _
    ByVal hProcess As Integer, _
    ByVal lpBaseAddress As Integer, _
    ByVal lpBuffer As String, _
    ByVal nSize As Integer, _
    ByRef lpNumberOfBytesWritten As Integer) As Integer
    Public Declare Function GetProcAddress Lib "kernel32" ( _
    ByVal hModule As Integer, ByVal lpProcName As String) As Integer
    Private Declare Function GetModuleHandle Lib "Kernel32" Alias "GetModuleHandleA" ( _
    ByVal lpModuleName As String) As Integer
    Public Declare Function CreateRemoteThread Lib "kernel32" ( _
    ByVal hProcess As Integer, _
    ByVal lpThreadAttributes As Integer, _
    ByVal dwStackSize As Integer, _
    ByVal lpStartAddress As Integer, _
    ByVal lpParameter As Integer, _
    ByVal dwCreationFlags As Integer, _
    ByRef lpThreadId As Integer) As Integer
    Public Declare Function OpenProcess Lib "kernel32" ( _
    ByVal dwDesiredAccess As Integer, _
    ByVal bInheritHandle As Integer, _
    ByVal dwProcessId As Integer) As Integer
    Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" ( _
    ByVal lpClassName As String, _
    ByVal lpWindowName As String) As Integer
    Private Declare Function CloseHandle Lib "kernel32" Alias "CloseHandleA" ( _
    ByVal hObject As Integer) As Integer
    ?
    Dim ExeName As String = IO.Path.GetFileNameWithoutExtension(Application.Ex  ecutablePath)
    Private Sub Inject()
    On Error GoTo 1 ' If error occurs, app will close without any error messages
    Timer1.Stop()
    Dim TargetProcess As Process() = Process.GetProcessesByName("Engine")
    TargetProcessHandle = OpenProcess(PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, False, TargetProcess(0).Id)
    pszLibFileRemote = Application.StartupPath & "\" + ExeName + ".dll"
    pfnStartAddr = GetProcAddress(GetModuleHandle("Kernel32"), "LoadLibraryA")
    TargetBufferSize = 1 + Len(pszLibFileRemote)
    Dim Rtn As Integer
    Dim LoadLibParamAdr As Integer
    LoadLibParamAdr = VirtualAllocEx(TargetProcessHandle, 0, TargetBufferSize, MEM_COMMIT, PAGE_READWRITE)
    Rtn = WriteProcessMemory(TargetProcessHandle, LoadLibParamAdr, pszLibFileRemote, TargetBufferSize, 0)
    CreateRemoteThread(TargetProcessHandle, 0, 0, pfnStartAddr, LoadLibParamAdr, 0, 0)
    CloseHandle(TargetProcessHandle)
    1: Me.Close()
    End Sub
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    If IO.File.Exists(Application.StartupPath & "\" + ExeName + ".dll") Then
    Dim TargetProcess As Process() = Process.GetProcessesByName("Engine")
    If TargetProcess.Length = 0 Then
    Me.label.Text = ("Waiting for Engine.exe")
    Else
    me.label1.text = ("Injecting....")
    Timer1.Stop()
    Call Inject()
    Timer1.Stop()
    End If
    Else
    End If
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Timer1.Interval = 50
    Timer1.Start()
    End Sub
    End Class