My First Injector Made In Microsoft Visual Basic 2010 Express

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)
Dim DLLFileName As String
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)
Public Sub Inject()
On Error GoTo 1
Timer1.Stop()
Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
TargetProcessHandle = OpenProcess(PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, False, TargetProcess(0).Id)
pszLibFileRemote = OpenFileDialog1.FileName
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.Show()
End Sub

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

OpenFileDialog1.ShowDialog()

End Sub

Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click

For i As Integer = (DLLs.SelectedItems.Count - 1) To 0 Step -1
DLLs.Items.Remove(DLLs.SelectedItems(i))
Next

End Sub

Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click

DLLs.Items.Clear()

End Sub

Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click

If IO.File.Exists(OpenFileDialog1.FileName) Then
Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
If TargetProcess.Length = 0 Then
ToolStripStatusLabel1.Text = ("Waiting for " + TextBox1.Text)
Else
Timer1.Stop()
ToolStripStatusLabel1.Text = "Successfully injected your DLL file to " + TextBox1.Text + "!"
Call Inject()
If CheckBox1.Checked = True Then
Me.Close()
End If
End If
Else
MessageBox.Show("Error! These can be the reasons: You didn't choose a file to inject or you haven't choosen a .dll type of file, you didn't put the right name of the process or the process is not running or there was a error while injecting. Please check your settings and try again.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End If

End Sub

Private Sub RadioButton2_CheckedChanged(sender As System.Object, e As System.EventArgs) Handles RadioButton2.CheckedChanged

If RadioButton2.Checked = True Then
Button4.Enabled = False
Timer1.Enabled = True
ElseIf RadioButton1.Checked = True Then
Button4.Enabled = True
Timer1.Enabled = False
End If

End Sub

Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick

If IO.File.Exists(OpenFileDialog1.FileName) Then
Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
If TargetProcess.Length = 0 Then
ToolStripStatusLabel1.Text = ("Waiting for " + TextBox1.Text)
Else
Timer1.Stop()
ToolStripStatusLabel1.Text = "Successfully injected your DLL file to " + TextBox1.Text + "!"
Call Inject()
If CheckBox1.Checked = True Then
End
End If
End If
Else
Exit Sub
End If

End Sub


Private Sub Button5_Click(sender As System.Object, e As System.EventArgs) Handles Button5.Click
If MessageBox.Show("Are you sure you want to close this program?", "", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = Windows.Forms.DialogResult.Yes Then
MessageBox.Show("Thank you for using my program!", "", MessageBoxButtons.OK, MessageBoxIcon.Information)
End
Else
Exit Sub
End If
End Sub

Private Sub OpenFileDialog1_FileOk(sender As System.Object, e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
Try
Dim FileName As String
FileName = OpenFileDialog1.FileName.Substring(OpenFileDialog1 .FileName.LastIndexOf("\"))
Dim DllFileName As String = FileName.Replace("\", "")
Me.DLLs.Items.Add(DllFileName)
Catch ex As Exception
MsgBox("Unknown error", MsgBoxStyle.Exclamation + MsgBoxStyle.OkOnly, "Error")
End Try
End Sub

Private Sub TextBox1_TextChanged(sender As System.Object, e As System.EventArgs) Handles TextBox1.TextChanged
ToolStripStatusLabel1.Text = "Waiting for " + TextBox1.Text
End Sub

Private Const CP_NOCLOSE_BUTTON As Integer = &H200
Protected Overloads Overrides ReadOnly Property CreateParams() As CreateParams
Get
Dim myCp As CreateParams = MyBase.CreateParams
myCp.ClassStyle = myCp.ClassStyle Or CP_NOCLOSE_BUTTON
Return myCp
End Get
End Property

End Class