mgeeky

[Reflection.Assembly]::LoadWithPartialName('Microsoft.JScript');
$js = 'var js = new ActiveXObject("WScript.Shell");js.Run("calc");'
[Microsoft.JScript.Eval]::JScriptEvaluate($js,[Microsoft.JScript.Vsa.VsaEngine]::CreateEngine());

mgeeky

import System;
import System.Runtime.InteropServices;
import System.Reflection;
import System.Reflection.Emit;
import System.Runtime;
import System.Text;
 
//C:\Windows\Microsoft.NET\Framework\v2.0.50727\jsc.exe Shellcode.js
//C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe Shellcode.js
 

mgeeky

using System;
using System.Runtime.CompilerServices;
using System.Reflection;
using System.Reflection.Emit;
namespace FunkyJit
{
    class Program
    {
        public static void Nothing() { Console.WriteLine(); }
        static void Main(string[] args)

mgeeky

### Original script and research by commial 
### https://github.com/commial/experiments/tree/master/windows-defender
### Set LUADec_Path to binary 
### https://github.com/viruscamp/luadec
import struct
import argparse
import sys
import os
import io
import subprocess

mgeeky

//original runner by @Arno0x: https://github.com/Arno0x/CSharpScripts/blob/master/shellcodeLauncher.cs

using System;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Reflection.Emit;

namespace ShellcodeLoader
{
    class Program

mgeeky

<?xml version="1.0"?>
<SiPolicy xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:schemas-microsoft-com:sipolicy">
  <VersionEx>10.0.3.14</VersionEx>
  <PlatformID>{2E07F7E4-194C-4D20-B7C9-6F44A6C5A234}</PlatformID>
  <PolicyID>{A244370E-44C9-4C06-B551-F6016E563076}</PolicyID>
  <BasePolicyID>{A244370E-44C9-4C06-B551-F6016E563076}</BasePolicyID>
  <Rules>
    <Rule>
      <Option>Enabled:UMCI</Option>
    </Rule>

mgeeky

README

Create a template service file at /etc/systemd/system/[email protected]. The template parameter will correspond to the name of target host:

[Unit]
Description=Setup a secure tunnel to %I
After=network.target

mgeeky

GhostLoader Steps :)

1. Create C:\Tools
2. Copy Some .NET, any .NET binary to C:\Tools
3. In this example, we use FileHistory.exe, but any .NET app will do.
4. Ensure FileHistory.exe.config is in the same path
5. Execute C:\Tools\FileHistory.exe

mgeeky

Let's turn Any .NET Application into an LOL Bin

We can do this by experimenting with .config files.

Many defenders catch/detect files that are renamed, they do this by matching Original Filename to Process Name

In this example, we don't have to rename anything. We simple coerce a trusted signed app to load our Assembly.

We do this by directing the application to read a config file we provide.