mgeeky

filter Expand-DefenderAVSignatureDB {
<#
.SYNOPSIS

Decompresses a Windows Defender AV signature database (.VDM file).

.DESCRIPTION

Expand-DefenderAVSignatureDB extracts a Windows Defender AV signature database (.VDM file). This function was developed by reversing mpengine.dll and with the help of Tavis Ormandy and his LoadLibrary project (https://github.com/taviso/loadlibrary). Note: Currently, "scrambled" databases are not supported although, I have yet to encounter a scrambled database. Thus far, all databases I've encountered are zlib-compressed.

mgeeky

{
  "targets": [
    {
      "target_name": "hello",
      "sources": [ "hello.cc" ]
    }
  ]
}

mgeeky

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

mgeeky

#include <Windows.h>
#include <winternl.h>

// Types
using LdrProtectMrdata_t = void(__stdcall*)(int);
using LdrProtectMrdataHeap_t = void(__thiscall*)(int);

struct ExceptionRecord_t {
  LIST_ENTRY entry;
  int* unknown_intptr;

mgeeky

#include <stdio.h>
#include <windows.h>
#include <winternl.h>

#define dwAllowDllCount 1
CHAR cAllowDlls[dwAllowDllCount][MAX_PATH] = {
                                                "W:\\allowed.dll"
                                             };

VOID HookLoadDll(LPVOID lpAddr);

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

using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;

namespace DinjectorWithQUserAPC
{


    public class Program