JCT/8x8-Work-updater
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Update 8x8_Work_Updater.ps1

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CristianD
2026-08-24 15:01:32 +01:00
parent 9cb53f7be4
commit 7ad944170c
1 changed files with 110 additions and 28 deletions
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8x8_Work_Updater.ps1
+110 -28
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@@ -1,8 +1,8 @@
# ==============================================================================
# Script Name: 8x8_Work_Updater.ps1
# Description: Downloads 8x8 with a progress bar, injects a user-session GUI
# countdown dialog via HKU RunOnce, waits for user response/timer,
# silently installs, and relaunches 8x8.
# Description: Downloads 8x8 with a progress bar, uses Win32 CreateProcessAsUser
# token duplication to display a live countdown GUI directly on
# the active user's screen, silently updates 8x8, and relaunches it.
# ==============================================================================
# Ensure script is running elevated
@@ -11,6 +11,7 @@ if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdenti
exit 1
}
# Load required .NET assemblies
Add-Type -AssemblyName System.Net.Http
$workDir = "C:\ProgramData\JCT600_8x8Update"
@@ -29,6 +30,96 @@ Set-Acl $workDir $acl
if (Test-Path $flagFile) { Remove-Item $flagFile -Force }
# ------------------------------------------------------------------------------
# Embedded C# Win32 Process Launcher (Crosses Session 0 Isolation via Token Duplication)
# ------------------------------------------------------------------------------
$TokenLauncherCode = @"
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
public class UserSessionLauncher
{
[DllImport("advapi32.dll", SetLastError = true)]
private static extern bool OpenProcessToken(IntPtr ProcessHandle, uint DesiredAccess, out IntPtr TokenHandle);
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern bool DuplicateTokenEx(IntPtr hExistingToken, uint dwDesiredAccess, IntPtr lpTokenAttributes, int ImpersonationLevel, int TokenType, out IntPtr phNewToken);
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern bool CreateProcessAsUser(IntPtr hToken, string lpApplicationName, string lpCommandLine, IntPtr lpProcessAttributes, IntPtr lpThreadAttributes, bool bInheritHandles, uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern bool CloseHandle(IntPtr hObject);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct STARTUPINFO
{
public int cb;
public string lpReserved;
public string lpDesktop;
public string lpTitle;
public int dwX;
public int dwY;
public int dwXSize;
public int dwYSize;
public int dwXCountChars;
public int dwYCountChars;
public int dwFillAttribute;
public int dwFlags;
public short wShowWindow;
public short cbReserved2;
public IntPtr lpReserved2;
public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;
}
[StructLayout(LayoutKind.Sequential)]
private struct PROCESS_INFORMATION
{
public IntPtr hProcess;
public IntPtr hThread;
public int dwProcessId;
public int dwThreadId;
}
public static bool StartProcessInUserSession(string commandLine)
{
Process[] explorers = Process.GetProcessesByName("explorer");
if (explorers.Length == 0) return false;
IntPtr hProcess = explorers[0].Handle;
IntPtr hToken = IntPtr.Zero;
IntPtr hDupToken = IntPtr.Zero;
if (!OpenProcessToken(hProcess, 0x0002 | 0x0004, out hToken)) return false;
if (!DuplicateTokenEx(hToken, 0x02000000 | 0x0001 | 0x0002 | 0x0004 | 0x0008 | 0x0010 | 0x0020 | 0x0040 | 0x0080 | 0x0100, IntPtr.Zero, 2, 1, out hDupToken))
{
CloseHandle(hToken);
return false;
}
STARTUPINFO si = new STARTUPINFO();
si.cb = Marshal.SizeOf(si);
si.lpDesktop = @"winsta0\default"; // Connect directly to interactive user display
PROCESS_INFORMATION pi = new PROCESS_INFORMATION();
bool result = CreateProcessAsUser(hDupToken, null, commandLine, IntPtr.Zero, IntPtr.Zero, false, 0x00000010, IntPtr.Zero, null, ref si, out pi);
if (pi.hProcess != IntPtr.Zero) CloseHandle(pi.hProcess);
if (pi.hThread != IntPtr.Zero) CloseHandle(pi.hThread);
if (hDupToken != IntPtr.Zero) CloseHandle(hDupToken);
if (hToken != IntPtr.Zero) CloseHandle(hToken);
return result;
}
}
"@
Add-Type -TypeDefinition $TokenLauncherCode -ErrorAction SilentlyContinue
try {
# --------------------------------------------------------------------------
# Step 1: Download 8x8 Setup Installer with Console Progress Bar
@@ -181,34 +272,26 @@ $form.Dispose()
[System.IO.File]::WriteAllText($guiScript, $guiContent, $utf8NoBom)
# --------------------------------------------------------------------------
# Step 3: Trigger Interactive GUI via Active Desktop Process Execution
# Step 3: Trigger Interactive GUI on Active User's Desktop via Token Duplication
# --------------------------------------------------------------------------
Write-Host "[3/5] Launching interactive dialog on active user desktop..." -ForegroundColor Cyan
$explorerProc = Get-Process -Name explorer -ErrorAction SilentlyContinue | Select-Object -First 1
if (-not $explorerProc) {
Write-Warning "No active desktop session detected. Proceeding directly to update."
Write-Warning "No active user desktop session detected. Proceeding directly to update."
} else {
# Query active user SID from Explorer process
$userSid = (Get-CimInstance -ClassName Win32_Process -Filter "ProcessId = $($explorerProc.Id)" | Invoke-CimMethod -MethodName GetOwnerSid).Sid
if ($userSid) {
# Inject RunOnce command directly into active user registry hive
$regPath = "Registry::HKEY_USERS\$userSid\Software\Microsoft\Windows\CurrentVersion\RunOnce"
$cmdToRun = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File `"$guiScript`""
if (Test-Path $regPath) {
Set-ItemProperty -Path $regPath -Name "JCT600_8x8_UpdateGUI" -Value $cmdToRun -Force
# Signal Explorer shell to execute RunOnce entries for active session
Start-Process "explorer.exe" -ArgumentList "shell:::{2559a1f3-21d7-11d4-bdaf-00c04f60b9f0}" -ErrorAction SilentlyContinue
}
}
$launchCmd = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File `"$guiScript`""
$launched = [UserSessionLauncher]::StartProcessInUserSession($launchCmd)
Write-Host "Waiting for user dialog response or timer expiration (1 hour max)..." -ForegroundColor Yellow
while (-not (Test-Path $flagFile)) {
Start-Sleep -Seconds 2
if ($launched) {
Write-Host "Dialog launched successfully on user's active screen." -ForegroundColor Green
Write-Host "Waiting for user response or timer expiration (1 hour max)..." -ForegroundColor Yellow
while (-not (Test-Path $flagFile)) {
Start-Sleep -Seconds 2
}
} else {
Write-Warning "Failed to duplicate user token. Proceeding to silent installation."
}
}
@@ -239,9 +322,9 @@ $form.Dispose()
Write-Host "Installation completed successfully." -ForegroundColor Green
# --------------------------------------------------------------------------
# Step 5: Launch 8x8 Work via Explorer Shell
# Step 5: Launch 8x8 Work via User Session Token
# --------------------------------------------------------------------------
Write-Host "[5/5] Launching 8x8 Work..." -ForegroundColor Cyan
Write-Host "[5/5] Launching 8x8 Work in user session..." -ForegroundColor Cyan
$possiblePaths = @(
"${env:ProgramFiles}\8x8 Inc\8x8 Work\8x8 Work.exe",
@@ -254,9 +337,8 @@ $form.Dispose()
if ($exePath) {
if ($explorerProc) {
# Run 8x8 via explorer.exe to launch under standard user graphics context
Start-Process "explorer.exe" -ArgumentList "`"$exePath`""
Write-Host "8x8 Work launched successfully." -ForegroundColor Green
[UserSessionLauncher]::StartProcessInUserSession("`"$exePath`"") | Out-Null
Write-Host "8x8 Work launched successfully in user context." -ForegroundColor Green
} else {
Start-Process -FilePath $exePath
}