From 956e4c968a1795d868e35fcb72311704d616cbaf Mon Sep 17 00:00:00 2001 From: mattifestation Date: Sun, 16 Nov 2014 10:26:11 -0500 Subject: Moving all RE functionality to PowerShellArsenal https://github.com/mattifestation/PowerShellArsenal PowerSploit will now stay true to its roots of being a purely offensive PowerShell module. --- ReverseEngineering/Get-ILDisassembly.ps1 | 215 ------------------------------- 1 file changed, 215 deletions(-) delete mode 100644 ReverseEngineering/Get-ILDisassembly.ps1 (limited to 'ReverseEngineering/Get-ILDisassembly.ps1') diff --git a/ReverseEngineering/Get-ILDisassembly.ps1 b/ReverseEngineering/Get-ILDisassembly.ps1 deleted file mode 100644 index 6948919..0000000 --- a/ReverseEngineering/Get-ILDisassembly.ps1 +++ /dev/null @@ -1,215 +0,0 @@ -function Get-ILDisassembly -{ -<# -.SYNOPSIS - -A MSIL (Microsoft Intermediate Language) disassembler. - -PowerSploit Function: Get-ILDisassembly -Author: Matthew Graeber (@mattifestation) -License: BSD 3-Clause -Required Dependencies: None -Optional Dependencies: None - -.DESCRIPTION - -Get-ILDisassembly disassembles a raw MSIL byte array passed in from a MethodInfo object in a manner similar to that of Ildasm. - -The majority of this code was simply translated from C# (with permission) from a code example taken from: "C# 4.0 in a Nutshell", Copyright 2010, Joseph Albahari and Ben Albahari, pg. 728-733 - -.PARAMETER MethodInfo - -A MethodInfo object that describes the implementation of the method and contains the IL for the method. - -.EXAMPLE - -C:\PS> [Int].GetMethod('Parse', [String]) | Get-ILDisassembly | Format-Table Position, Instruction, Operand -AutoSize - -Position Instruction Operand --------- ----------- ------- -IL_0000 ldarg.0 -IL_0001 ldc.i4.7 -IL_0002 call System.Globalization.NumberFormatInfo.get_CurrentInfo -IL_0007 call System.Number.ParseInt32 -IL_000C ret - -Description ------------ -Disassembles the System.Int32.Parse(String) method - -.EXAMPLE - -C:\PS> $MethodInfo = [Array].GetMethod('BinarySearch', [Type[]]([Array], [Object])) -C:\PS> Get-ILDisassembly $MethodInfo | Format-Table Position, Instruction, Operand -AutoSize - -Position Instruction Operand --------- ----------- ------- -IL_0000 ldarg.0 -IL_0001 brtrue.s IL_000E -IL_0003 ldstr 'array' -IL_0008 newobj System.ArgumentNullException..ctor -IL_000D throw -IL_000E ldarg.0 -IL_000F ldc.i4.0 -IL_0010 callvirt System.Array.GetLowerBound -IL_0015 stloc.0 -IL_0016 ldarg.0 -IL_0017 ldloc.0 -IL_0018 ldarg.0 -IL_0019 callvirt System.Array.get_Length -IL_001E ldarg.1 -IL_001F ldnull -IL_0020 call System.Array.BinarySearch -IL_0025 ret - -Description ------------ -Disassembles the System.Array.BinarySearch(Array, Object) method - -.INPUTS - -System.Reflection.MethodInfo, System.Reflection.ConstructorInfo - -A method or constructor description containing the raw IL bytecodes. - -.OUTPUTS - -System.Object - -Returns a custom object consisting of a position, instruction, and opcode parameter. - -.LINK - -http://www.exploit-monday.com -http://www.albahari.com/nutshell/cs4ch18.aspx -http://msdn.microsoft.com/en-us/library/system.reflection.emit.opcodes.aspx -http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-335.pdf -#> - - Param ( - [Parameter(Mandatory = $True, ValueFromPipeline = $True)] - [ValidateScript({$_ -is [Reflection.MethodInfo] -or $_ -is [Reflection.ConstructorInfo]})] - [Object] - $MethodInfo - ) - - if (!($MethodInfo.GetMethodBody())) { - return - } - - $IL = $MethodInfo.GetMethodBody().GetILAsByteArray() - $MethodModule = $MethodInfo.DeclaringType.Module - - $OpCodeTable = @{} - - # Fill OpCodeTable with every OpCode so that it can be referenced by numeric byte value - [System.Reflection.Emit.OpCodes].GetMembers() | - ForEach-Object { - try { - $OpCode = $_.GetValue($null) - $OpCodeTable[[Int16] $OpCode.Value] = $OpCode - } catch {} - } - - $Position = 0 - - # Disassemble every instruction until the end of the IL bytecode array is reached - while ($Position -lt $IL.Length) { - - # Get current instruction position - $InstructionPostion = "IL_{0}" -f ($Position.ToString('X4')) - - if ($IL[$Position] -eq 0xFE) { - # You are dealing with a two-byte opcode in this case - $Op = $OpCodeTable[[Int16] ([BitConverter]::ToInt16($IL[($Position+1)..$Position], 0))] - $Position++ - } else { - # Otherwise, it's a one-byte opcode - $Op = $OpCodeTable[[Int16] $IL[$Position]] - } - - $Position++ - - $Type = $Op.OperandType - $Operand = $null - $OpInt = $null - - if ($Type -eq 'InlineNone') { - $OperandLength = 0 - } elseif (($Type -eq 'ShortInlineBrTarget') -or ($Type -eq 'ShortInlineI') -or ($Type -eq 'ShortInlineVar')) { - $OperandLength = 1 - - if ($Type -eq 'ShortInlineBrTarget') { # Short relative jump instruction - # [SByte]::Parse was used because PowerShell doesn't handle signed bytes well - $Target = $Position + ([SByte]::Parse($IL[$Position].ToString('X2'), 'AllowHexSpecifier')) + 1 - $Operand = "IL_{0}" -f ($Target.ToString('X4')) - } - } elseif ($Type -eq 'InlineVar') { - $OperandLength = 2 - } elseif (($Type -eq 'InlineI8') -or (($Type -eq 'InlineR'))) { - $OperandLength = 8 - } elseif ($Type -eq 'InlineSwitch') { - # This is the only operand type with a variable number of operands - $TargetCount = [BitConverter]::ToInt32($IL, $Position) - $OperandLength = 4 * ($TargetCount + 1) - $Targets = New-Object String[]($TargetCount) - - foreach ($i in 0..($TargetCount - 1)) { - # Get all switch jump targets - $Target = [BitConverter]::ToInt32($IL, ($Position + ($i + 1) * 4)) - $Targets[$i] = "IL_{0}" -f (($Position + $Target + $OperandLength).ToString('X4')) - } - - $Operand = "({0})" -f ($Targets -join ',') - } else { - $OperandLength = 4 - $Operand = $null - - $OpInt = [BitConverter]::ToInt32($IL, $Position) - - if (($Type -eq 'InlineTok') -or ($Type -eq 'InlineMethod') -or ($Type -eq 'InlineField') -or ($Type -eq 'InlineType')) { - # Resolve all operands with metadata tokens - Write-Verbose "OpCode Metadata for member: $OpInt" - try { $MemberInfo = $MethodModule.ResolveMember($OpInt) } catch { $Operand = $null } - if (!$MemberInfo) { $Operand = $null } - - # Retrieve the actual name of the class and method - if ($MemberInfo.ReflectedType) { - $Operand = "{0}.{1}" -f ($MemberInfo.ReflectedType.Fullname), ($MemberInfo.Name) - } elseif ($MemberInfo -is [Type]) { - $Operand = $MemberInfo.GetType().FullName - } else { - $Operand = $MemberInfo.Name - } - } elseif ($Type -eq 'InlineString') { - # Retrieve the referenced string - $Operand = "`'{0}`'" -f ($MethodModule.ResolveString($OpInt)) - } elseif ($Type -eq 'InlineBrTarget') { - $Operand = "IL_{0}" -f (($Position + $OpInt + 4).ToString('X4')) - } else { - $Operand = $null - } - } - - if (($OperandLength -gt 0) -and ($OperandLength -ne 4) -and ($Type -ne 'InlineSwitch') -and ($Type -ne 'ShortInlineBrTarget')) { - # Simply print the hex for all operands with immediate values - $Operand = "0x{0}" -f (($IL[($Position+$OperandLength-1)..$Position] | ForEach-Object { $_.ToString('X2') }) -join '') - } - - $Instruction = @{ - Position = $InstructionPostion - Instruction = $Op - Operand = $Operand - MetadataToken = $OpInt - } - - # Return a custom object containing a position, instruction, and fully-qualified operand - $InstructionObject = New-Object PSObject -Property $Instruction - $InstructionObject.PSObject.TypeNames.Insert(0, 'IL_INSTRUCTION') - - $InstructionObject - - # Adjust the position in the opcode array accordingly - $Position += $OperandLength - } -} -- cgit v1.2.3