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Get-PESecurity.psm1
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Get-PESecurity.psm1
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<#
# Author: Eric Gruber 2014, NetSPI
# Updated: Alex Verboon July 28.2017, added Control Flow Guard information
.Synopsis
Updated module to pull security information from compiled Windows binaries.
.EXAMPLE
Get-PESecurity -File C:\Windows\System32\cmd.exe
.EXAMPLE
Get-PESecurity -Directory C:\Windows\System32\
#>
function Get-PESecurity
{
[CmdletBinding()]
Param
(
# Directory to scan
[Parameter(Mandatory = $false,
ValueFromPipelineByPropertyName = $true,
Position = 0)]
[String]$Directory,
# File to scan
[Parameter(Mandatory = $false,
ValueFromPipelineByPropertyName = $true,
Position = 0)]
[String]$File,
#Recursive flag
[Parameter(Mandatory = $false,
ValueFromPipelineByPropertyName = $false,
Position = 1)]
[Switch]$Recursive,
#Skip Authenticode
[Parameter(Mandatory = $false,
ValueFromPipelineByPropertyName = $false,
Position = 2)]
[Switch]$SkipAuthenticode
)
Begin
{
$ModuleName = 'Win32'
$AssemblyName = [System.Reflection.AssemblyName]::new(${ModuleName})
$AssemblyAccess = [System.Reflection.Emit.AssemblyBuilderAccess]::Run
if($PSVersionTable['PSEdition'] -eq 'Core') {
$AssemblyBuilder = [System.Reflection.Emit.AssemblyBuilder]::DefineDynamicAssembly($AssemblyName, $AssemblyAccess)
} else
{
$AssemblyBuilder = [AppDomain]::CurrentDomain.DefineDynamicAssembly($AssemblyName, $AssemblyAccess)
}
$Mod = $AssemblyBuilder.DefineDynamicModule($ModuleName)
$ImageDosSignature = enumerate $Mod PE.IMAGE_DOS_SIGNATURE UInt16 @{
DOS_SIGNATURE = 0x5A4D
OS2_SIGNATURE = 0x454E
OS2_SIGNATURE_LE = 0x454C
VXD_SIGNATURE = 0x454C
}
$ImageFileMachine = enumerate $Mod PE.IMAGE_FILE_MACHINE UInt16 @{
UNKNOWN = 0x0000
I386 = 0x014C # Intel 386.
R3000 = 0x0162 # MIPS little-endian =0x160 big-endian
R4000 = 0x0166 # MIPS little-endian
R10000 = 0x0168 # MIPS little-endian
WCEMIPSV2 = 0x0169 # MIPS little-endian WCE v2
ALPHA = 0x0184 # Alpha_AXP
SH3 = 0x01A2 # SH3 little-endian
SH3DSP = 0x01A3
SH3E = 0x01A4 # SH3E little-endian
SH4 = 0x01A6 # SH4 little-endian
SH5 = 0x01A8 # SH5
ARM = 0x01C0 # ARM Little-Endian
THUMB = 0x01C2
ARMNT = 0x01C4 # ARM Thumb-2 Little-Endian
AM33 = 0x01D3
POWERPC = 0x01F0 # IBM PowerPC Little-Endian
POWERPCFP = 0x01F1
IA64 = 0x0200 # Intel 64
MIPS16 = 0x0266 # MIPS
ALPHA64 = 0x0284 # ALPHA64
MIPSFPU = 0x0366 # MIPS
MIPSFPU16 = 0x0466 # MIPS
TRICORE = 0x0520 # Infineon
CEF = 0x0CEF
EBC = 0x0EBC # EFI public byte Code
AMD64 = 0x8664 # AMD64 (K8)
M32R = 0x9041 # M32R little-endian
CEE = 0xC0EE
}
$ImageFileCharacteristics = enumerate $Mod PE.IMAGE_FILE_CHARACTERISTICS UInt16 @{
IMAGE_RELOCS_STRIPPED = 0x0001 # Relocation info stripped from file.
IMAGE_EXECUTABLE_IMAGE = 0x0002 # File is executable (i.e. no unresolved external references).
IMAGE_LINE_NUMS_STRIPPED = 0x0004 # Line nunbers stripped from file.
IMAGE_LOCAL_SYMS_STRIPPED = 0x0008 # Local symbols stripped from file.
IMAGE_AGGRESIVE_WS_TRIM = 0x0010 # Agressively trim working set
IMAGE_LARGE_ADDRESS_AWARE = 0x0020 # App can handle >2gb addresses
IMAGE_REVERSED_LO = 0x0080 # public bytes of machine public ushort are reversed.
IMAGE_32BIT_MACHINE = 0x0100 # 32 bit public ushort machine.
IMAGE_DEBUG_STRIPPED = 0x0200 # Debugging info stripped from file in .DBG file
IMAGE_REMOVABLE_RUN_FROM_SWAP = 0x0400 # If Image is on removable media copy and run from the swap file.
IMAGE_NET_RUN_FROM_SWAP = 0x0800 # If Image is on Net copy and run from the swap file.
IMAGE_SYSTEM = 0x1000 # System File.
IMAGE_DLL = 0x2000 # File is a DLL.
IMAGE_UP_SYSTEM_ONLY = 0x4000 # File should only be run on a UP machine
IMAGE_REVERSED_HI = 0x8000 # public bytes of machine public ushort are reversed.
} -Bitfield
$ImageHdrMagic = enumerate $Mod PE.IMAGE_NT_OPTIONAL_HDR_MAGIC UInt16 @{
PE32 = 0x010B
PE64 = 0x020B
}
$ImageNTSig = enumerate $Mod PE.IMAGE_NT_SIGNATURE UInt32 @{
VALID_PE_SIGNATURE = 0x00004550
}
$ImageSubsystem = enumerate $Mod PE.IMAGE_SUBSYSTEM UInt16 @{
UNKNOWN = 0
NATIVE = 1 # Image doesn't require a subsystem.
WINDOWS_GUI = 2 # Image runs in the Windows GUI subsystem.
WINDOWS_CUI = 3 # Image runs in the Windows character subsystem.
OS2_CUI = 5 # Image runs in the OS/2 character subsystem.
POSIX_CUI = 7 # Image runs in the Posix character subsystem.
NATIVE_WINDOWS = 8 # Image is a native Win9x driver.
WINDOWS_CE_GUI = 9 # Image runs in the Windows CE subsystem.
EFI_APPLICATION = 10
EFI_BOOT_SERVICE_DRIVER = 11
EFI_RUNTIME_DRIVER = 12
EFI_ROM = 13
XBOX = 14
WINDOWS_BOOT_APPLICATION = 16
}
$ImageDllCharacteristics = enumerate $Mod PE.IMAGE_DLLCHARACTERISTICS UInt16 @{
HIGH_ENTROPY_VA = 0x0020 # Opts in to high entropy ASLR
DYNAMIC_BASE = 0x0040 # DLL can move.
FORCE_INTEGRITY = 0x0080 # Code Integrity Image
NX_COMPAT = 0x0100 # Image is NX compatible
NO_ISOLATION = 0x0200 # Image understands isolation and doesn't want it
NO_SEH = 0x0400 # Image does not use SEH. No SE handler may reside in this image
NO_BIND = 0x0800 # Do not bind this image.
WDM_DRIVER = 0x2000 # Driver uses WDM model
GUARD_CF = 0x4000 # Control Flow Guard
TERMINAL_SERVER_AWARE = 0x8000
} -Bitfield
$ImageScn = enumerate $Mod PE.IMAGE_SCN Int32 @{
TYPE_NO_PAD = 0x00000008 # Reserved.
CNT_CODE = 0x00000020 # Section contains code.
CNT_INITIALIZED_DATA = 0x00000040 # Section contains initialized data.
CNT_UNINITIALIZED_DATA = 0x00000080 # Section contains uninitialized data.
LNK_INFO = 0x00000200 # Section contains comments or some other type of information.
LNK_REMOVE = 0x00000800 # Section contents will not become part of image.
LNK_COMDAT = 0x00001000 # Section contents comdat.
NO_DEFER_SPEC_EXC = 0x00004000 # Reset speculative exceptions handling bits in the TLB entries for this section.
GPREL = 0x00008000 # Section content can be accessed relative to GP
MEM_FARDATA = 0x00008000
MEM_PURGEABLE = 0x00020000
MEM_16BIT = 0x00020000
MEM_LOCKED = 0x00040000
MEM_PRELOAD = 0x00080000
ALIGN_1BYTES = 0x00100000
ALIGN_2BYTES = 0x00200000
ALIGN_4BYTES = 0x00300000
ALIGN_8BYTES = 0x00400000
ALIGN_16BYTES = 0x00500000 # Default alignment if no others are specified.
ALIGN_32BYTES = 0x00600000
ALIGN_64BYTES = 0x00700000
ALIGN_128BYTES = 0x00800000
ALIGN_256BYTES = 0x00900000
ALIGN_512BYTES = 0x00A00000
ALIGN_1024BYTES = 0x00B00000
ALIGN_2048BYTES = 0x00C00000
ALIGN_4096BYTES = 0x00D00000
ALIGN_8192BYTES = 0x00E00000
ALIGN_MASK = 0x00F00000
LNK_NRELOC_OVFL = 0x01000000 # Section contains extended relocations.
MEM_DISCARDABLE = 0x02000000 # Section can be discarded.
MEM_NOT_CACHED = 0x04000000 # Section is not cachable.
MEM_NOT_PAGED = 0x08000000 # Section is not pageable.
MEM_SHARED = 0x10000000 # Section is shareable.
MEM_EXECUTE = 0x20000000 # Section is executable.
MEM_READ = 0x40000000 # Section is readable.
MEM_WRITE = 0x80000000 # Section is writeable.
} -Bitfield
$ImageDosHeader = struct $Mod PE.IMAGE_DOS_HEADER @{
e_magic = field 0 $ImageDosSignature
e_cblp = field 1 UInt16
e_cp = field 2 UInt16
e_crlc = field 3 UInt16
e_cparhdr = field 4 UInt16
e_minalloc = field 5 UInt16
e_maxalloc = field 6 UInt16
e_ss = field 7 UInt16
e_sp = field 8 UInt16
e_csum = field 9 UInt16
e_ip = field 10 UInt16
e_cs = field 11 UInt16
e_lfarlc = field 12 UInt16
e_ovno = field 13 UInt16
e_res = field 14 UInt16[] -MarshalAs @('ByValArray', 4)
e_oemid = field 15 UInt16
e_oeminfo = field 16 UInt16
e_res2 = field 17 UInt16[] -MarshalAs @('ByValArray', 10)
e_lfanew = field 18 Int32
}
$ImageFileHeader = struct $Mod PE.IMAGE_FILE_HEADER @{
Machine = field 0 $ImageFileMachine
NumberOfSections = field 1 UInt16
TimeDateStamp = field 2 UInt32
PointerToSymbolTable = field 3 UInt32
NumberOfSymbols = field 4 UInt32
SizeOfOptionalHeader = field 5 UInt16
Characteristics = field 6 $ImageFileCharacteristics
}
$PeImageDataDir = struct $Mod PE.IMAGE_DATA_DIRECTORY @{
VirtualAddress = field 0 UInt32
Size = field 1 UInt32
}
$ImageOptionalHdr = struct $Mod PE.IMAGE_OPTIONAL_HEADER @{
Magic = field 0 $ImageHdrMagic
MajorLinkerVersion = field 1 Byte
MinorLinkerVersion = field 2 Byte
SizeOfCode = field 3 UInt32
SizeOfInitializedData = field 4 UInt32
SizeOfUninitializedData = field 5 UInt32
AddressOfEntryPoint = field 6 UInt32
BaseOfCode = field 7 UInt32
BaseOfData = field 8 UInt32
ImageBase = field 9 UInt32
SectionAlignment = field 10 UInt32
FileAlignment = field 11 UInt32
MajorOperatingSystemVersion = field 12 UInt16
MinorOperatingSystemVersion = field 13 UInt16
MajorImageVersion = field 14 UInt16
MinorImageVersion = field 15 UInt16
MajorSubsystemVersion = field 16 UInt16
MinorSubsystemVersion = field 17 UInt16
Win32VersionValue = field 18 UInt32
SizeOfImage = field 19 UInt32
SizeOfHeaders = field 20 UInt32
CheckSum = field 21 UInt32
Subsystem = field 22 $ImageSubsystem
DllCharacteristics = field 23 $ImageDllCharacteristics
SizeOfStackReserve = field 24 UInt32
SizeOfStackCommit = field 25 UInt32
SizeOfHeapReserve = field 26 UInt32
SizeOfHeapCommit = field 27 UInt32
LoaderFlags = field 28 UInt32
NumberOfRvaAndSizes = field 29 UInt32
DataDirectory = field 30 $PeImageDataDir.MakeArrayType() -MarshalAs @('ByValArray', 16)
}
$ImageOptionalHdr64 = struct $Mod PE.IMAGE_OPTIONAL_HEADER64 @{
Magic = field 0 $ImageHdrMagic
MajorLinkerVersion = field 1 Byte
MinorLinkerVersion = field 2 Byte
SizeOfCode = field 3 UInt32
SizeOfInitializedData = field 4 UInt32
SizeOfUninitializedData = field 5 UInt32
AddressOfEntryPoint = field 6 UInt32
BaseOfCode = field 7 UInt32
ImageBase = field 8 UInt64
SectionAlignment = field 9 UInt32
FileAlignment = field 10 UInt32
MajorOperatingSystemVersion = field 11 UInt16
MinorOperatingSystemVersion = field 12 UInt16
MajorImageVersion = field 13 UInt16
MinorImageVersion = field 14 UInt16
MajorSubsystemVersion = field 15 UInt16
MinorSubsystemVersion = field 16 UInt16
Win32VersionValue = field 17 UInt32
SizeOfImage = field 18 UInt32
SizeOfHeaders = field 19 UInt32
CheckSum = field 20 UInt32
Subsystem = field 21 $ImageSubsystem
DllCharacteristics = field 22 $ImageDllCharacteristics
SizeOfStackReserve = field 23 UInt64
SizeOfStackCommit = field 24 UInt64
SizeOfHeapReserve = field 25 UInt64
SizeOfHeapCommit = field 26 UInt64
LoaderFlags = field 27 UInt32
NumberOfRvaAndSizes = field 28 UInt32
DataDirectory = field 29 $PeImageDataDir.MakeArrayType() -MarshalAs @('ByValArray', 16)
}
$ImageSectionHdrs = struct $Mod PE.IMAGE_SECTION_HEADER @{
Name = field 0 String -MarshalAs @('ByValTStr', 8)
VirtualSize = field 1 UInt32
VirtualAddress = field 2 UInt32
SizeOfRawData = field 3 UInt32
PointerToRawData = field 4 UInt32
PointerToRelocations = field 5 UInt32
PointerToLinenumbers = field 6 UInt32
NumberOfRelocations = field 7 UInt16
NumberOfLinenumbers = field 8 UInt16
Characteristics = field 9 $ImageScn
}
$ImageConfigDirectory = struct $Mod PE.IMAGE_LOAD_CONFIG_DIRECTORY @{
Size = field 0 UInt32
TimeDateStamp = field 1 UInt32
MajorVersion = field 2 UInt16
MinorVersion = field 3 UInt16
GlobalFlagsClear = field 4 UInt32
GlobalFlagsSet = field 5 UInt32
CriticalSectionDefaultTimeout = field 6 UInt32
DeCommitFreeBlockThreshold = field 7 UInt32
DeCommitTotalFreeThreshold = field 8 UInt32
LockPrefixTable = field 9 UInt32
MaximumAllocationSize = field 10 UInt32
VirtualMemoryThreshold = field 11 UInt32
ProcessHeapFlags = field 12 UInt32
ProcessAffinityMask = field 13 UInt32
CSDVersion = field 14 UInt16
Reserved1 = field 15 UInt16
EditList = field 16 UInt32
SecurityCookie = field 17 UInt32
SEHandlerTable = field 18 UInt32
SEHandlerCount = field 19 UInt32
GuardCFCheckFunctionPointer = field 20 UInt32
GuardCFDispatchFunctionPointer = field 21 UInt32
GuardCFFunctionTable = field 22 UInt32
GuardCFFunctionCount = field 23 UInt32
GuardFlags = field 24 UInt32
CodeIntegrity = field 25 UInt32
GuardAddressTakenIatEntryTable = field 26 UInt32
GuardAddressTakenIatEntryCount = field 27 UInt32
GuardLongJumpTargetTable = field 28 UInt32
GuardLongJumpTargetCount = field 29 UInt32
}
$ImageNTHdrs = struct $Mod PE.IMAGE_NT_HEADERS @{
Signature = field 0 $ImageNTSig
FileHeader = field 1 $ImageFileHeader
OptionalHeader = field 2 $ImageOptionalHdr
}
$ImageNTHdrs64 = struct $Mod PE.IMAGE_NT_HEADERS64 @{
Signature = field 0 $ImageNTSig
FileHeader = field 1 $ImageFileHeader
OptionalHeader = field 2 $ImageOptionalHdr64
}
$FunctionDefinitions = @(
(func kernel32 GetProcAddress ([IntPtr]) @([IntPtr], [String])),
(func kernel32 GetModuleHandle ([Intptr]) @([String])),
(func ntdll RtlGetCurrentPeb ([IntPtr]) @())
)
$Table = New-Object system.Data.DataTable 'table'
$Col1 = New-Object system.Data.DataColumn FileName, ([string])
$Col2 = New-Object system.Data.DataColumn ARCH, ([string])
$Col3 = New-Object system.Data.DataColumn DotNET, ([string])
$Col4 = New-Object system.Data.DataColumn ASLR, ([string])
$Col5 = New-Object system.Data.DataColumn DEP, ([string])
$Col6 = New-Object system.Data.DataColumn Authenticode, ([string])
$Col7 = New-Object system.Data.DataColumn StrongNaming, ([string])
$Col8 = New-Object system.Data.DataColumn SafeSEH, ([string])
$Col9 = New-Object system.Data.DataColumn ControlFlowGuard, ([string])
$Col10 = New-Object system.Data.DataColumn HighentropyVA, ([string])
$Table.columns.add($Col1)
$Table.columns.add($Col2)
$Table.columns.add($Col3)
$Table.columns.add($Col4)
$Table.columns.add($Col5)
$Table.columns.add($Col6)
$Table.columns.add($Col7)
$Table.columns.add($Col8)
$Table.columns.add($Col9)
$Table.columns.add($Col10)
}
Process
{
$Files = Get-Files
Enumerate-Files $Files $Table
$Table
}
End
{
}
}
function Enumerate-Files
{
param
(
[System.Object]
$Files,
[System.Object]
$Table
)
foreach ($CurrentFile in $Files)
{
$DotNET = $false
$ASLR = $false
$HighentropyVA = $false
$DEP = $false
$SEH = $false
$ControlFlowGuard = $false
$Authenticode = $false
$StrongNaming = $false
# Determine file length
$FileInfo = New-Object System.IO.FileInfo($CurrentFile)
$FileLength = $FileInfo.length
$FileStream = New-Object System.IO.FileStream($CurrentFile, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read)
$FileByteArray = New-Object Byte[]($FileStream.Length)
$FileStream.Read($FileByteArray, 0, $FileStream.Length) | Out-Null
$FileStream.Close()
$Handle = [System.Runtime.InteropServices.GCHandle]::Alloc($FileByteArray, 'Pinned')
$PEBaseAddr = $Handle.AddrOfPinnedObject()
$DosHeader = $PEBaseAddr -as $ImageDosHeader
if ($FileByteArray.Length -lt $DosHeader.e_lfanew)
{
continue
}
$PointerNtHeader = [IntPtr] ($PEBaseAddr.ToInt64() + $DosHeader.e_lfanew)
$NTHeader = $PointerNtHeader -as $ImageNTHdrs
if ($NTHeader.OptionalHeader.Magic -eq 0){
$Row = $Table.NewRow()
$Row.FileName = $CurrentFile
$Row.ARCH = 'Unknown Format'
$Row.DotNET = 'Unknown Format'
$Row.ASLR = 'Unknown Format'
$Row.HighentropyVA = 'Unknown Format'
$Row.DEP = 'Unknown Format'
$Row.Authenticode = 'Unknown Format'
$Row.StrongNaming = 'Unknown Format'
$Row.SafeSEH = 'Unknown Format'
$Row.ControlFlowGuard = 'Unknown Format'
$Table.Rows.Add($Row)
Continue
}
if ($NTHeader.OptionalHeader.Magic -eq 'PE64')
{
$NTHeader = $PointerNtHeader -as $ImageNTHdrs64
}
if($NTHeader.OptionalHeader.DataDirectory[14].VirtualAddress -ne 0) {
$DotNet = $true
}
$ARCH = $NTHeader.FileHeader.Machine.toString()
$FileCharacteristics = $NTHeader.FileHeader.Characteristics.toString().Split(',')
$DllCharacteristics = $NTHeader.OptionalHeader.DllCharacteristics.toString().Split(',')
$value = 0
$ASLR = $false
if([int32]::TryParse($DllCharacteristics, [ref]$value)){
if($value -band 0x20){
$HighentropyVA = $true
}
if($value -band 0x40){
$ASLR = $true
}
if($value -band 0x100){
$DEP = $true
}
if($value -band 0x400){
$SEH = 'N/A'
}
if($value -band 0x4000){
$ControlFlowGuard = $true
}
} else {
foreach($DllCharacteristic in $DllCharacteristics)
{
switch($DllCharacteristic.Trim()){
'DYNAMIC_BASE'
{
$ASLR = $true
}
'NX_COMPAT'
{
$DEP = $true
}
'NO_SEH'
{
$SEH = 'N/A'
}
'GUARD_CF'
{
$ControlFlowGuard = $true
}
'HIGH_ENTROPY_VA'
{
$HighentropyVA = $true
}
}
}
}
if($ASLR){
foreach($FileCharacteristic in $FileCharacteristics){
switch($FileCharacteristic.Trim()){
'IMAGE_RELOCS_STRIPPED'
{
$Stripped = $true
}
}
}
$OS = [Environment]::OSVersion
$WindowsCheck = $true
if($OS.Version.Build -ge 9200){
$WindowsCheck = $false
}
if($WindowsCheck){
if (-not $DotNet -and $Stripped){
$ASLR = 'False (DYNAMICBASE Set And Relocation Table Stripped)'
}
}
}
if ($DotNet) {
$ControlFlowGuard = 'N/A'
}
#Get Strongnaming Status
$StrongNaming = Get-StrongNamingStatus $CurrentFile
#Get Authenticode Status
$Authenticode = 'N/A'
if(!$SkipAuthenticode)
{
$Authenticode = Get-AuthenticodeStatus $CurrentFile
}
if ($ARCH -eq 'AMD64')
{
$SEH = 'N/A'
}
if ($ARCH -ne 'AMD64')
{
$HighentropyVA = 'N/A'
}
if ($SEH -ne 'N/A')
{
#Get SEH Status
$SEH = Get-SEHStatus $CurrentFile $NTHeader $PointerNtHeader $PEBaseAddr
}
#Write everything to a DataTable
$Row = $Table.NewRow()
$Row.FileName = $CurrentFile
$Row.ARCH = $ARCH
$Row.DotNET = $DotNET
$Row.ASLR = $ASLR
$Row.DEP = $DEP
$Row.Authenticode = $Authenticode
$Row.StrongNaming = $StrongNaming
$Row.SafeSEH = $SEH
$Row.ControlFlowGuard = $ControlFlowGuard
$Row.HighentropyVA = $HighentropyVA
$Table.Rows.Add($Row)
}
}
function Get-AuthenticodeStatus
{
param
(
[System.Object]
$CurrentFile
)
$Status = Get-AuthenticodeSignature $CurrentFile | Select-Object -ExpandProperty Status
if ($Status -eq 'Valid')
{
$Authenticode = $true
}
else
{
$Authenticode = $false
}
$Authenticode
}
function Get-SEHStatus
{
param
(
[System.Object]
$CurrentFile,
[System.Object]
$NTHeader,
[System.Object]
$PointerNtHeader,
[System.Object]
$PEBaseAddr
)
$NumSections = $NTHeader.FileHeader.NumberOfSections
$PointerSectionHeader = [IntPtr] ($PointerNtHeader.ToInt64() + [System.Runtime.InteropServices.Marshal]::SizeOf([System.Type] $ImageNTHdrs))
#Create an array of SectionHeaders
$SectionHeaders = @(New-Object $ImageSectionHdrs) * $NumSections
foreach ($i in 0..($NumSections - 1))
{
$SectionHeaders[$i] = [System.Runtime.InteropServices.Marshal]::PtrToStructure(([IntPtr] ($PointerSectionHeader.ToInt64() + ($i * [System.Runtime.InteropServices.Marshal]::SizeOf([System.Type] $ImageSectionHdrs)))), [System.Type] $ImageSectionHdrs)
}
$ConfigPointer = [IntPtr] ($PEBaseAddr.ToInt64() + $NTHeader.OptionalHeader.DataDirectory[10].VirtualAddress)
$ConfigPointer = Convert-RVAToFileOffset $ConfigPointer
$ConfigDirectory = [System.Runtime.InteropServices.Marshal]::PtrToStructure([IntPtr] $ConfigPointer, [System.Type] $ImageConfigDirectory)
$SEHandlerTable = $ConfigDirectory.SEHandlerTable
$SEHandlerCount = $ConfigDirectory.SEHandlerCount
if($NTHeader.OptionalHeader.DataDirectory[10].VirtualAddress -eq 0)
{
$SEH = $false
}
elseif($ConfigDirectory.Size -lt 72)
{
$SEH = $false
}
elseif($SEHandlerTable -ne 0 -and $SEHandlerCount -ne 0)
{
$SEH = $true
}
elseif($SEHandlerTable -eq 0 -or $SEHandlerCount -eq 0)
{
$SEH = $false
}
$SEH
}
function Get-StrongNamingStatus
{
param
(
[System.Object]
$CurrentFile
)
try
{
$StongNaming = [System.Reflection.AssemblyName]::GetAssemblyName($CurrentFile).GetPublicKeyToken().Count -gt 0
}
catch
{
$StongNaming = 'N/A'
}
$StongNaming
}
function Get-GS {
}
function Get-Files
{
$Files = @()
if($Directory)
{
$Files += Get-FilesFromDirectory
}
if($File)
{
$Files += Get-ChildItem $File
}
$Files
}
function Get-FilesFromDirectory
{
if($Recursive)
{
Get-ChildItem -Path "$Directory\*" -Recurse -Include *.exe, *.dll | ForEach-Object {
$Files += $_
}
}
else
{
Get-ChildItem -Path "$Directory\*" -Include *.exe, *.dll |ForEach-Object {
$Files += $_
}
}
$Files
}
function Convert-RVAToFileOffset
{
#Author: Matthew Graeber (@mattifestation)
param
(
[IntPtr]
$Rva
)
foreach ($Section in $SectionHeaders)
{
if ((($Rva.ToInt64() - $PEBaseAddr.ToInt64()) -ge $Section.VirtualAddress) -and (($Rva.ToInt64() - $PEBaseAddr.ToInt64()) -lt ($Section.VirtualAddress + $Section.VirtualSize)))
{
return [IntPtr] ($Rva.ToInt64() - ($Section.VirtualAddress - $Section.PointerToRawData))
}
}
$Rva
}
<#
The following functions are from Matt Graeber's method of PSReflection
https://github.com/mattifestation/PSReflect
#>
function func
{
#Author: Matthew Graeber (@mattifestation)
Param
(
[Parameter(Position = 0, Mandatory = $true)]
[String]
$DllName,
[Parameter(Position = 1, Mandatory = $true)]
[string]
$FunctionName,
[Parameter(Position = 2, Mandatory = $true)]
[Type]
$ReturnType,
[Parameter(Position = 3)]
[Type[]]
$ParameterTypes,
[Parameter(Position = 4)]
[Runtime.InteropServices.CallingConvention]
$NativeCallingConvention,
[Parameter(Position = 5)]
[Runtime.InteropServices.CharSet]
$Charset,
[Switch]
$SetLastError
)
$Properties = @{
DllName = $DllName
FunctionName = $FunctionName
ReturnType = $ReturnType
}
if ($ParameterTypes)
{
$Properties['ParameterTypes'] = $ParameterTypes
}
if ($NativeCallingConvention)
{
$Properties['NativeCallingConvention'] = $NativeCallingConvention
}
if ($Charset)
{
$Properties['Charset'] = $Charset
}
if ($SetLastError)
{
$Properties['SetLastError'] = $SetLastError
}
New-Object PSObject -Property $Properties
}
function enumerate
{
<#
Author: Matthew Graeber (@mattifestation)
.SYNOPSIS
Creates an in-memory enumeration for use in your PowerShell session.
Author: Matthew Graeber (@mattifestation)
License: BSD 3-Clause
Required Dependencies: None
Optional Dependencies: None
.DESCRIPTION
The 'enum' function facilitates the creation of enums entirely in
memory using as close to a "C style" as PowerShell will allow.
.PARAMETER Module
The in-memory module that will host the enum. Use
New-InMemoryModule to define an in-memory module.
.PARAMETER FullName
The fully-qualified name of the enum.
.PARAMETER Type
The type of each enum element.
.PARAMETER EnumElements
A hashtable of enum elements.
.PARAMETER Bitfield
Specifies that the enum should be treated as a bitfield.
.EXAMPLE
$Mod = New-InMemoryModule -ModuleName Win32
$ImageSubsystem = enum $Mod PE.IMAGE_SUBSYSTEM UInt16 @{
UNKNOWN = 0
NATIVE = 1 # Image doesn't require a subsystem.
WINDOWS_GUI = 2 # Image runs in the Windows GUI subsystem.
WINDOWS_CUI = 3 # Image runs in the Windows character subsystem.
OS2_CUI = 5 # Image runs in the OS/2 character subsystem.
POSIX_CUI = 7 # Image runs in the Posix character subsystem.
NATIVE_WINDOWS = 8 # Image is a native Win9x driver.
WINDOWS_CE_GUI = 9 # Image runs in the Windows CE subsystem.
EFI_APPLICATION = 10
EFI_BOOT_SERVICE_DRIVER = 11
EFI_RUNTIME_DRIVER = 12
EFI_ROM = 13
XBOX = 14
WINDOWS_BOOT_APPLICATION = 16
}
.NOTES
PowerShell purists may disagree with the naming of this function but
again, this was developed in such a way so as to emulate a "C style"
definition as closely as possible. Sorry, I'm not going to name it
New-Enum. :P
#>
[OutputType([Type])]
Param
(
[Parameter(Position = 0, Mandatory = $true)]
[Reflection.Emit.ModuleBuilder]
$Module,
[Parameter(Position = 1, Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[String]
$FullName,
[Parameter(Position = 2, Mandatory = $true)]
[Type]
$Type,
[Parameter(Position = 3, Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[Hashtable]
$EnumElements,
[Switch]
$Bitfield
)
$EnumType = $Type -as [Type]
$EnumBuilder = $Module.DefineEnum($FullName, 'Public', $EnumType)
if ($Bitfield)
{
$FlagsConstructor = [FlagsAttribute].GetConstructor(@())
$FlagsCustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($FlagsConstructor, @())
$EnumBuilder.SetCustomAttribute($FlagsCustomAttribute)
}
foreach ($Key in $EnumElements.Keys)
{
# Apply the specified enum type to each element
$null = $EnumBuilder.DefineLiteral($Key, $EnumElements[$Key] -as $EnumType)
}
$EnumBuilder.CreateType()
}
function struct
{
<#
Author: Matthew Graeber (@mattifestation)
.SYNOPSIS
Creates an in-memory struct for use in your PowerShell session.
Author: Matthew Graeber (@mattifestation)
License: BSD 3-Clause
Required Dependencies: None
Optional Dependencies: field
.DESCRIPTION
The 'struct' function facilitates the creation of structs entirely in
memory using as close to a "C style" as PowerShell will allow. Struct
fields are specified using a hashtable where each field of the struct
is comprosed of the order in which it should be defined, its .NET
type, and optionally, its offset and special marshaling attributes.
One of the features of 'struct' is that after your struct is defined,
it will come with a built-in GetSize method as well as an explicit
converter so that you can easily cast an IntPtr to the struct without
relying upon calling SizeOf and/or PtrToStructure in the Marshal
class.
.PARAMETER Module
The in-memory module that will host the struct. Use
New-InMemoryModule to define an in-memory module.
.PARAMETER FullName
The fully-qualified name of the struct.
.PARAMETER StructFields
A hashtable of fields. Use the 'field' helper function to ease
defining each field.
.PARAMETER PackingSize
Specifies the memory alignment of fields.
.PARAMETER ExplicitLayout
Indicates that an explicit offset for each field will be specified.
.EXAMPLE
$Mod = New-InMemoryModule -ModuleName Win32
$ImageDosSignature = enum $Mod PE.IMAGE_DOS_SIGNATURE UInt16 @{
DOS_SIGNATURE = 0x5A4D
OS2_SIGNATURE = 0x454E
OS2_SIGNATURE_LE = 0x454C
VXD_SIGNATURE = 0x454C
}
$ImageDosHeader = struct $Mod PE.IMAGE_DOS_HEADER @{
e_magic = field 0 $ImageDosSignature
e_cblp = field 1 UInt16
e_cp = field 2 UInt16
e_crlc = field 3 UInt16
e_cparhdr = field 4 UInt16
e_minalloc = field 5 UInt16
e_maxalloc = field 6 UInt16
e_ss = field 7 UInt16
e_sp = field 8 UInt16
e_csum = field 9 UInt16
e_ip = field 10 UInt16
e_cs = field 11 UInt16
e_lfarlc = field 12 UInt16
e_ovno = field 13 UInt16
e_res = field 14 UInt16[] -MarshalAs @('ByValArray', 4)
e_oemid = field 15 UInt16
e_oeminfo = field 16 UInt16
e_res2 = field 17 UInt16[] -MarshalAs @('ByValArray', 10)
e_lfanew = field 18 Int32
}
# Example of using an explicit layout in order to create a union.
$TestUnion = struct $Mod TestUnion @{
field1 = field 0 UInt32 0
field2 = field 1 IntPtr 0
} -ExplicitLayout
.NOTES
PowerShell purists may disagree with the naming of this function but
again, this was developed in such a way so as to emulate a "C style"
definition as closely as possible. Sorry, I'm not going to name it
New-Struct. :P
#>
[OutputType([Type])]
Param
(
[Parameter(Position = 1, Mandatory = $true)]
[Reflection.Emit.ModuleBuilder]