Update 8x8_Work_Updater.ps1
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+35
-41
@@ -1,7 +1,7 @@
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# ==============================================================================
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# Script Name: 8x8_Work_Updater.ps1
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# Description: Downloads 8x8, launches an interactive JCT600 GUI attached to
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# the active user's desktop via schtasks /IT, waits for response,
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# Description: Downloads 8x8, injects a native user-session GUI popup,
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# waits for completion/override (1-hour countdown),
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# silently installs, relaunches 8x8 Work, and cleans up.
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# ==============================================================================
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@@ -11,18 +11,14 @@ if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdenti
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exit 1
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}
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# Use C:\ProgramData\ so standard users have full read/execute access
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$workDir = "C:\ProgramData\JCT600_8x8Update"
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$flagFile = Join-Path $workDir "8x8_Update_Proceed.flag"
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$guiScript = Join-Path $workDir "Show-8x8UserGui.ps1"
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$vbsScript = Join-Path $workDir "LaunchGuiHidden.vbs"
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$taskName = "JCT600_8x8_Update_Notification"
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if (-not (Test-Path $workDir)) {
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New-Item -Path $workDir -ItemType Directory -Force | Out-Null
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}
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# Clean stale flag file
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if (Test-Path $flagFile) { Remove-Item $flagFile -Force }
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try {
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@@ -42,9 +38,9 @@ try {
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}
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# --------------------------------------------------------------------------
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# Step 2: Write User GUI & Zero-Console VBS Launcher
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# Step 2: Write User-Session GUI Script
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# --------------------------------------------------------------------------
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Write-Host "[2/5] Generating user-session GUI and hidden launcher..." -ForegroundColor Cyan
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Write-Host "[2/5] Generating user-session GUI dialog..." -ForegroundColor Cyan
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$guiContent = @'
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Add-Type -AssemblyName System.Windows.Forms
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@@ -146,44 +142,40 @@ $timer.Dispose()
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$form.Dispose()
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'@
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# Write UTF8 without BOM
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$utf8NoBom = New-Object System.Text.UTF8Encoding($false)
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[System.IO.File]::WriteAllText($guiScript, $guiContent, $utf8NoBom)
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# VBScript Wrapper (ASCII)
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$vbsContent = @"
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Set WshShell = CreateObject("WScript.Shell")
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WshShell.Run "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File ""$guiScript""", 0, False
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"@
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[System.IO.File]::WriteAllText($vbsScript, $vbsContent, [System.Text.Encoding]::ASCII)
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# --------------------------------------------------------------------------
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# Step 3: Trigger Interactive GUI Attached to User Desktop WindowStation
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# Step 3: Launch GUI Directly into User Session via Explorer Process Trigger
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# --------------------------------------------------------------------------
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Write-Host "[3/5] Launching dialog in active user's desktop session..." -ForegroundColor Cyan
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$loggedUser = (Get-CimInstance -ClassName Win32_ComputerSystem).UserName
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if ([string]::IsNullOrEmpty($loggedUser)) {
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$explorerProc = Get-Process -Name explorer -ErrorAction SilentlyContinue | Select-Object -First 1
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if ($explorerProc) {
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$loggedUser = (Get-CimInstance -ClassName Win32_Process -Filter "ProcessId = $($explorerProc.Id)" | Invoke-CimMethod -MethodName GetOwner).User
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}
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}
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if ([string]::IsNullOrEmpty($loggedUser)) {
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Write-Warning "No active interactive user detected. Proceeding directly to silent update."
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if (-not $explorerProc) {
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Write-Warning "No active user explorer session found. Proceeding directly to update."
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} else {
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Write-Host "Detected active user: $loggedUser" -ForegroundColor Green
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# Query active user SID from Explorer process
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$userSid = (Get-CimInstance -ClassName Win32_Process -Filter "ProcessId = $($explorerProc.Id)" | Invoke-CimMethod -MethodName GetOwnerSid).Sid
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Write-Host "Active Desktop SID: $userSid" -ForegroundColor Green
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# Register task using schtasks.exe /IT to force GUI attachment to active screen station
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$trCommand = "wscript.exe `"$vbsScript`""
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& schtasks.exe /Create /TN $taskName /TR $trCommand /SC ONCE /ST 00:00 /RU $loggedUser /IT /F | Out-Null
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& schtasks.exe /Run /TN $taskName | Out-Null
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# Spawn GUI process directly inside explorer's user context using PowerShell WMI/CIM process creation
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$cmdToRun = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File `"$guiScript`""
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# Fallback to direct process invocation if user session is active
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$taskName = "JCT600_8x8_Update_UserDialog"
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$action = New-ScheduledTaskAction -Execute "powershell.exe" -Argument "-ExecutionPolicy Bypass -WindowStyle Hidden -File `"$guiScript`""
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$trigger = New-ScheduledTaskTrigger -At (Get-Date).AddSeconds(2) -Once
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$principal = New-ScheduledTaskPrincipal -UserId $userSid -LogonType Interactive -RunLevel Limited
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Register-ScheduledTask -TaskName $taskName -Action $action -Trigger $trigger -Principal $principal -Force | Out-Null
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Write-Host "Waiting for user dialog response or timer expiration (1 hour max)..." -ForegroundColor Yellow
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while (-not (Test-Path $flagFile)) {
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Start-Sleep -Seconds 2
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}
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Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
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}
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# --------------------------------------------------------------------------
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@@ -213,9 +205,9 @@ WshShell.Run "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File "
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Write-Host "Installation completed successfully." -ForegroundColor Green
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# --------------------------------------------------------------------------
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# Step 5: Launch 8x8 Work in User Desktop Session
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# Step 5: Launch 8x8 Work
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# --------------------------------------------------------------------------
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Write-Host "[5/5] Launching 8x8 Work in user session..." -ForegroundColor Cyan
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Write-Host "[5/5] Launching 8x8 Work..." -ForegroundColor Cyan
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$possiblePaths = @(
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"${env:ProgramFiles}\8x8 Inc\8x8 Work\8x8 Work.exe",
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@@ -227,13 +219,17 @@ WshShell.Run "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File "
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$exePath = $possiblePaths | Where-Object { Test-Path $_ } | Select-Object -First 1
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if ($exePath) {
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if (-not [string]::IsNullOrEmpty($loggedUser)) {
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if ($explorerProc) {
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# Run 8x8 Work inside user session to avoid GPU access elevation crashes
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$launchTask = "JCT600_8x8_AppLaunch"
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& schtasks.exe /Create /TN $launchTask /TR "`"$exePath`"" /SC ONCE /ST 00:00 /RU $loggedUser /IT /F | Out-Null
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& schtasks.exe /Run /TN $launchTask | Out-Null
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Start-Sleep -Seconds 3
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& schtasks.exe /Delete /TN $launchTask /F | Out-Null
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Write-Host "8x8 Work launched successfully for $loggedUser." -ForegroundColor Green
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$launchAction = New-ScheduledTaskAction -Execute "$exePath"
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$launchTrigger = New-ScheduledTaskTrigger -At (Get-Date).AddSeconds(2) -Once
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$launchPrincipal = New-ScheduledTaskPrincipal -UserId $userSid -LogonType Interactive -RunLevel Limited
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Register-ScheduledTask -TaskName $launchTask -Action $launchAction -Trigger $launchTrigger -Principal $launchPrincipal -Force | Out-Null
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Start-Sleep -Seconds 4
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Unregister-ScheduledTask -TaskName $launchTask -Confirm:$false -ErrorAction SilentlyContinue
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Write-Host "8x8 Work launched successfully." -ForegroundColor Green
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} else {
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Start-Process -FilePath $exePath
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}
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@@ -245,9 +241,7 @@ WshShell.Run "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File "
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# --------------------------------------------------------------------------
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# Mandatory Cleanup
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# --------------------------------------------------------------------------
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Write-Host "Cleaning up scheduled task and temporary files..." -ForegroundColor Gray
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& schtasks.exe /Delete /TN $taskName /F 2>$null | Out-Null
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Write-Host "Cleaning up temporary files..." -ForegroundColor Gray
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if (Test-Path $workDir) {
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Remove-Item $workDir -Recurse -Force -ErrorAction SilentlyContinue
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}
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