Prompts to select folder to scan for .jar files with JndiLookup.Class present (Log4j) - Run script as Administrator - Requires .NET 4.5 installed on server

Remove-JndiLookupClass.ps1

[System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms") | Out-Null
$FolderBrowserDialog = New-Object System.Windows.Forms.FolderBrowserDialog
$FolderBrowserDialog.RootFolder = 'MyComputer'
$FolderBrowserDialog.Description = 'Select the folder containing the log4j .jar files'
$result = $FolderBrowserDialog.ShowDialog((New-Object System.Windows.Forms.Form -Property @{TopMost = $true }))

If($result -eq "OK") {
    $folderToScan = $FolderBrowserDialog.SelectedPath
    Write-Host $folderToScan
}else {
    Exit
}

if($folderToScan){
    
    [System.IO.Directory]::SetCurrentDirectory($folderToScan)
    [Reflection.Assembly]::LoadWithPartialName('System.IO.Compression')
    foreach($sourceFile in (Get-ChildItem -Path $folderToScan -File -Filter '*.jar')){
        $stream = New-Object IO.FileStream($sourceFile, [IO.FileMode]::Open)
        $mode   = [IO.Compression.ZipArchiveMode]::Update
        $zip    = New-Object IO.Compression.ZipArchive($stream, $mode)
        ($zip.Entries | Where-Object { $_.FullName -like 'org/apache/logging/log4j/core/lookup/JndiLookup.class'}) | ForEach-Object {
            $inFile = $sourceFile.FullName
            $outFile = $inFile + '.bak'
            Write-Host "Found JndiLookup.class in -> $inFile" -ForegroundColor Yellow
            Write-host "Copying backup to -> $outFile" -ForegroundColor Magenta
            Copy-Item -Path $inFile -Destination $outFile
            $_.Delete()
        }
        $zip.Dispose()
        $stream.Close()
        $stream.Dispose()
    }

}