Guardians of the Directory9 Apr 2025

Kerberos Pre-Auth: Hidden AD Risk

In this episode of Directory Insights in 10 Minutes, Craig Birch breaks down one of the most overlooked Active Directory misconfigurations: the "Do not require Kerberos pre-authentication" setting.🔍 Why it matters:Enables AS-REP Roasting attacks using tools like Hashcat or John the RipperAllows silent user enumeration without authentication failuresCan go undetected by SIEMs and security logs🛠️ What you'll learn:How this setting weakens AD securityHow attackers abuse it for initial access and password crackingHow to detect and remediate affected accounts using PowerShell🧠 Practical, fast, and built for real-world AD admins—no fluff.▶️ Chapters: 00:00 - Intro00:45 - Why “Do Not Require Pre-Auth” Is Dangerous02:30 - AS-REP Roasting Explained03:20 - Finding Vulnerable Accounts (GUI + PowerShell)05:40 - Remediation Script Walkthrough08:20 - Final Recommendations📥 PowerShell Script:# Import the Active Directory moduleImport-Module ActiveDirectory# Find user accounts that do not require Kerberos preauthentication$users = Get-ADUser -Filter {DoesNotRequirePreAuth -eq $true} -Properties DoesNotRequirePreAuth# Display the accounts that do not require Kerberos preauthentication$users | Select-Object Name, SamAccountName, UserPrincipalName# Pause for confirmation before remediationRead-Host -Prompt "Press Enter to remediate these accounts"# Remediate all accounts by setting DoesNotRequirePreAuth to $falseforeach ($user in $users) { Set-ADAccountControl -Identity $user -DoesNotRequirePreAuth $false}

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Episoder(18)

Hybrid Identity is Broken: Rethinking AD, Entra ID & the Bridge in Between

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26 Jun 202530min

AdminSDHolder in Active Directory: Hidden Risks and Persistent Threats

In this episode of Directory Insights in 10 Minutes, Craig Birch breaks down the often-misunderstood AdminSDHolder object in Active Directory and why it's a high-value target for attackers. Learn how ...

1 Mai 20256min

Admin Accounts with SPNs — Hidden Risk Behind Kerberoasting

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15 Apr 20255min

Directory Insights in 10 Minutes: Remediating DES Encryption in Active Directory

Welcome to another episode of Directory Insights in 10 Minutes, powered by Guardians of the Directory. In this quick-hitting session, host Craig Birch walks through the process of identifying and reme...

1 Apr 20254min

Directory Insights in 10 Minutes Reversible Password Encryption – A Hidden Risk

Summary:In this episode of Directory Insights in 10 Minutes, we dive into a critical yet often overlooked Active Directory misconfiguration—Allowing Password Storage with Reversible Encryption.This se...

18 Mar 20254min

Directory Insights in 10 minutes: Password Not Required - The Hidden Risk

Episode OverviewIn this episode of Directory Insights in 10 Minutes, we’re exposing a dangerous yet overlooked Active Directory misconfiguration—PasswordNotRequired.Most AD admins assume password poli...

11 Mar 20255min