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Certifried combined with KrbRelayUp

Certifried (CVE-2022-26923) gives Domain Admin from non-privileged user with the requirement adding computer accounts or owning a computer account. Kerberos Relay targeting LDAP and Shadow Credentials gives a non-privileged domain user on a domain-joined machine local admin access on (aka owning) the machine. Combination of these two: non-privileged domain user escalating to Domain Admin without the requirement adding/owning computer accounts.

The attack below uses only Windows (no Linux tools interacting with the Domain), simulating a real-world attack scenario.

Prerequisites:

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MS-MSDT 0-day Office RCE

MS Office docx files may contain external OLE Object references as HTML files. There is an HTML sceme "ms-msdt:" which invokes the msdt diagnostic tool, what is capable of executing arbitrary code (specified in parameters).

The result is a terrifying attack vector for getting RCE through opening malicious docx files (without using macros).

Here are the steps to build a Proof-of-Concept docx:

1. Open Word (used up-to-date 2019 Pro, 16.0.10386.20017), create a dummy document, insert an (OLE) object (as a Bitmap Image), save it in docx.

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# Simple script to check drivers in C:\windows\system32\drivers against the loldrivers list
# Author: Oddvar Moe - @oddvar.moe

$drivers = get-childitem -Path c:\windows\system32\drivers
$web_client = new-object system.net.webclient
$loldrivers = $web_client.DownloadString(" https://www.loldrivers.io/api/drivers.json") | ConvertFrom-Json

Write-output("Checking {0} drivers in C:\windows\system32\drivers against loldrivers.io json file" -f $drivers.Count)
foreach ($lol in $loldrivers.KnownVulnerableSamples)
{

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using System;
using System.Collections.Generic;
using System.DirectoryServices.Protocols;
using System.Globalization;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;
using System.Security.Policy;
using System.Security.Principal;
using System.Text;

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function Enable-TSDuplicateToken {
<#
  .SYNOPSIS
  Duplicates the Access token of lsass and sets it in the current process thread.

  .DESCRIPTION
  The Enable-TSDuplicateToken CmdLet duplicates the Access token of lsass and sets it in the current process thread.
  The CmdLet must be run with elevated permissions.

  .EXAMPLE