Injector [Source]

Public Class Form1
    Dim dlls As New Dictionary(Of String, String)
    Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Integer, ByVal bInheritHandle As Integer, ByVal dwProcessId As Integer) As Integer
    Private 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
    Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Integer, ByVal lpBaseAddress As Integer, ByVal lpBuffer() As Byte, ByVal nSize As Integer, ByVal lpNumberOfBytesWritten As UInteger) As Boolean
    Private 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
    Private 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, ByVal lpThreadId As Integer) As Integer
    Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Integer, ByVal dwMilliseconds As Integer) As Integer
    Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Integer) As Integer

    Private Function Inject(ByVal pID As Integer, ByVal dllLocation As String) As Boolean
        If IntPtr.Size = 8 Then Throw New ArgumentException("Please make sure this program is compiled as x86, not x64. Memory functions don't work so well otherwise.") '//check our project is compiled to x86, otherwise everything will run fine, but nothing will happen.
        Dim hProcess As Integer = OpenProcess(&H1F0FFF, 1, pID) '//copied the access value /tehe
        If hProcess = 0 Then Return False '//check that we managed to obtain a handle, if we didn't there is no point continuing.
        Dim dllBytes As Byte() = System.Text.Encoding.ASCII.GetBytes(dllLocation)
        Dim allocAddress As Integer = VirtualAllocEx(hProcess, 0, dllBytes.Length, &H1000, &H4)
        If allocAddress = Nothing Then Return False '//if the memory allocation failed then we gotta quit.
        Dim kernelMod As Integer = GetModuleHandle("kernel32.dll") '//kernel holds the LoadLibrary function, and its loaded to a constant address space, so we can find the load address in our own processes memory and assume it will be the same in the target process.
        Dim loadLibAddr = GetProcAddress(kernelMod, "LoadLibraryA") '//find the address of LoadLibrary in kernel.
        If kernelMod = 0 OrElse loadLibAddr = 0 Then Return False
        WriteProcessMemory(hProcess, allocAddress, dllBytes, dllBytes.Length, 0) '// write the dll location as bytes to the process memory in the location we allocated earlier, we'll use this address when we call LoadLibrary so it knows where to load the dll from
        Dim libThread As Integer = CreateRemoteThread(hProcess, 0, 0, loadLibAddr, allocAddress, 0, 0) '//call the LoadLibrary function in the target process and pass the location of our DLL to it (actually, we just pass the address to where it should read it from, it does the rest)
        If libThread = 0 Then
            Return False '// couldn't create the thread, quit now
        Else
            WaitForSingleObject(libThread, 5000) '//give the process 5 seconds to finish using the LoadLibrary function if it needs it
            CloseHandle(libThread) '//close our handle to the thread.
        End If
        CloseHandle(hProcess) '//close our handle to the process
        Label3.Text = "DLL injected successfully."
        If CheckBox1.Checked = True Then
            Me.Close()
        End If
        Label3.ForeColor = Color.Green
        Return True
    End Function
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If My.Settings.Inject = "auto" Then
            RadioButton1.Checked = True
        ElseIf My.Settings.Inject = "manual" Then
            RadioButton2.Checked = True
        Else
            RadioButton1.Checked = True
        End If
    End Sub

    Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
        If CheckBox1.Checked = True Then
            My.Settings.Close = 1
        Else
            My.Settings.Close = 0
        End If
        My.Settings.Save()
        My.Settings.Reload()
        If My.Settings.Close = 1 Then
            CheckBox1.Checked = True
        Else
            CheckBox1.Checked = False
        End If
    End Sub

    Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
        My.Settings.Inject = "auto"
        My.Settings.Save()
        My.Settings.Reload()
        Button3.Enabled = False
        Timer1.Start()
    End Sub

    Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged
        My.Settings.Inject = "manual"
        My.Settings.Save()
        My.Settings.Reload()
        Button3.Enabled = True
        Timer1.Stop()
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If ListBox1.Items.Count > 0 Then
            Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
            If TargetProcess.Length = 0 Then
                Label3.Text = ("Waiting for " + TextBox1.Text + ".exe")
                Label3.ForeColor = Color.Red
            Else
                Dim ProcID As Integer = Process.GetProcessesByName(TextBox1.Text)(0).Id
                Timer1.Stop()
                Timer2.Stop()
                For Each inj As KeyValuePair(Of String, String) In dlls
                    Inject(ProcID, inj.Value)
                Next
            End If
        End If
    End Sub

    Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
        If TextBox1.Text = "" Then
            Label3.Text = "Waiting for process to be set."
            Label3.ForeColor = Color.Red
            Timer1.Stop()

        ElseIf ListBox1.Items.Count = 0 Then
            Label3.Text = "Waiting for DLL path."
            Label3.ForeColor = Color.Red
            Timer1.Stop()

        Else
            Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
            If TargetProcess.Length = 0 Then
                Label3.Text = ("Waiting for " + TextBox1.Text + ".exe")
                Label3.ForeColor = Color.Red
            Else
                If RadioButton1.Checked = True Then
                    Timer1.Start()
                End If
            End If
        End If
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        If ListBox1.Items.Count > 0 Then
            If TextBox1.Text <> "" Then
                Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
                If TargetProcess.Length = 0 Then
                    MsgBox(TextBox1.Text + ".exe is not running.", MsgBoxStyle.Critical, "Error")
                Else
                    Timer1.Stop()
                    Dim ProcID As Integer = Process.GetProcessesByName(TextBox1.Text)(0).Id
                    For Each inj As KeyValuePair(Of String, String) In dlls
                        Inject(ProcID, inj.Value)
                    Next
                End If
            Else
                MsgBox("You haven't specificed a process.", MsgBoxStyle.Critical, "Error")
            End If
        Else
            MsgBox("You need to select a dll file to inject.", MsgBoxStyle.Critical, "Error")
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        OpenFileDialog1.Filter = "DLL (*.dll) |*.dll"
        OpenFileDialog1.ShowDialog()
    End Sub

    Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
        Dim FileName As String = OpenFileDialog1.FileName.Substring(OpenFileDialog1  .FileName.LastIndexOf("\"))
        Dim DllFileName As String = FileName.Replace("\", "")
        ListBox1.Items.Add(DllFileName)
        dlls.Add(DllFileName, OpenFileDialog1.FileName)
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        If ListBox1.SelectedIndex >= 0 Then
            OpenFileDialog1.Reset()
            dlls.Remove(ListBox1.SelectedItem)
            For i As Integer = (ListBox1.SelectedItems.Count - 1) To 0 Step -1
                Dim i2 As Integer = i + 2
                ListBox1.Items.Remove(ListBox1.SelectedItems(i))
            Next
        End If
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        ListBox1.Items.Clear()
        dlls.Clear()
    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        MsgBox("Made by bigdaddy135 / coded by Dark Side")
    End Sub
End Class