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Introduction:
Active Directory (AD) remains the backbone of identity infrastructure for 90% of Fortune 1000 companies, yet it is consistently the primary target in ransomware campaigns and nation‑state intrusions. This guide moves beyond basic “next‑next‑finish” deployment and transforms AD DS installation on Windows Server 2022 into a holistic security exercise. You will learn not only how to stand up a domain controller but how to instrument it with defensive layers, validate its resilience using adversary‑simulation tools, and extend its governance into hybrid cloud environments.
Learning Objectives:
- Deploy Active Directory Domain Services (AD DS) on Windows Server 2022 with security‑by‑design configurations, not default settings.
- Harden Kerberos, NTLM, and Group Policy Objects (GPO) against credential theft and lateral movement.
- Perform Active Directory security auditing using native tools and open‑source frameworks (PowerView, BloodHound, PingCastle).
- Implement Linux system integration with AD via SSSD and Realmd, including privilege separation.
- Detect and block common AD attack techniques (Kerberoasting, DCSync, ACL abuse) with Windows Event Logs and Sysmon.
You Should Know:
1. Domain Controller Hardening During AD DS Installation
A domain controller is not just a database – it is the root of trust. The standard GUI wizard leaves numerous attack surfaces open.
Step‑by‑step guide – Windows Server 2022 secure AD DS promotion:
Install AD DS role silently Install-WindowsFeature -Name AD-Domain-Services -IncludeManagementTools Create a secure NTDS folder on a non‑OS drive $ntdsPath = "E:\NTDS" $sysvolPath = "E:\SYSVOL" New-Item -ItemType Directory -Path $ntdsPath, $sysvolPath -Force Import AD DS deployment module and configure domain with enhanced security Import-Module ADDSDeployment Install-ADDSForest ` -DomainName "undercode.local" ` -DomainNetbiosName "UNDERCODE" ` -DatabasePath $ntdsPath ` -LogPath $ntdsPath ` -SysvolPath $sysvolPath ` -InstallDNS:$true ` -CreateDnsDelegation:$false ` -NoRebootOnCompletion:$false ` -Force:$true
What this does: Moves the Active Directory database and logs to a dedicated volume – prevents OS disk exhaustion attacks and simplifies backup. DNS is integrated but delegation is disabled to avoid DNS takeover techniques.
Post‑installation hardening (run on DC immediately):
Disable NTLMv1 and enforce NTLMv2 with session security Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Lsa" ` -Name "LmCompatibilityLevel" -Value 5 -Type DWord Disable WDigest – prevents cleartext passwords in LSASS Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest" ` -Name "UseLogonCredential" -Value 0 -Type DWord Enable LDAP signing and LDAP channel binding Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\NTDS\Parameters" ` -Name "LDAPServerIntegrity" -Value 2 -Type DWord
2. Group Policy Hardening – Blocking Lateral Movement
Default domain policy is notoriously weak. Three specific GPO settings eliminate entire classes of attacks.
Step‑by‑step – Local Administrator Password Solution (LAPS) and admin tiering:
Import LAPS PowerShell module (requires RSAT) Install-WindowsOption -FeatureName "LAPS" Update-Help LAPS Extend AD schema for LAPS Import-Module LAPS Set-AdmPwdComputerSelfPermission -OrgUnit "OU=Workstations,DC=undercode,DC=local" Create GPO for LAPS configuration New-GPO -Name "LAPS Policy" | New-GPLink -Target "DC=undercode,DC=local" Set-GPRegistryValue -Name "LAPS Policy" ` -Key "HKLM\Software\Policies\Microsoft Services\AdmPwd" ` -ValueName "PasswordComplexity" -Type DWord -Value 4
Why this matters: LAPS rotates local administrator passwords every 30 days and stores them in AD with attribute‑level ACLs – Pass‑the‑Hash becomes nearly impossible without domain admin rights.
Disable LLMNR and NBT‑NS (stop responder attacks):
GPO: Computer Configuration > Policies > Admin Templates > Network > DNS Client Set-GPRegistryValue -Name "Hardening Baseline" ` -Key "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient" ` -ValueName "EnableMulticast" -Type DWord -Value 0
3. Kerberos Hardening & Silver Ticket Mitigation
Kerberos tickets are golden to attackers. Three registry modifications raise the bar for ticket forgery.
Step‑by‑step – Kerberos armoring and PAC validation:
Enable Kerberos armoring (flexible authentication fast) Set-ItemProperty -Path "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters" ` -Name "SupportCompoundSpn" -Value 1 -Type DWord Enforce PAC validation – prevents MS14‑068 style exploits Set-ItemProperty -Path "HKLM\SYSTEM\CurrentControlSet\Control\Lsa\Kerberos\Parameters" ` -Name "ValidateKdcPacSignature" -Value 1 -Type DWord Set maximum Kerberos ticket lifetime to 8 hours (reduces credential theft window) Set-ADDefaultDomainPasswordPolicy -Identity undercode.local ` -MaxTicketAge 8:00 ` -MaxServiceAge 8:00
- Active Directory Security Auditing – Attack Surface Discovery
You cannot defend what you cannot see. Using GitHub tooling from Muhammad Shaban’s repository (https://github.com/muhammadshaban89/RHCE-Servers/tree/main/ActiveDirectory), we perform zero‑privilege reconnaissance to identify misconfigurations.
Step‑by‑step – BloodHound and PowerView enumeration:
From an unprivileged domain workstation
iex (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/BloodHoundAD/BloodHound/master/Collectors/SharpHound.ps1')
Invoke-BloodHound -CollectionMethod All -OutputDirectory C:\ADAudit
Parse results for analysis
Look for: Kerberoastable accounts, adminCount=1 users, DCSync rights, nested groups
Linux side – Enumeration with Impacket (from Kali):
Get all domain users and SPNs (Kerberoasting preparation) impacket-GetUserSPNs -request -dc-ip 10.0.0.1 undecode.local/user Check for unconstrained delegation impacket-findDelegation undecode.local/user
- Linux Integration with Active Directory – Secure Hybrid Authentication
Modern environments mix Windows and Linux. Using SSSD with AD ensures consistent identity but introduces unique hardening requirements.
Step‑by‑step – RHEL 9 domain join with privilege separation:
Install required packages dnf install realmd sssd oddjob oddjob-mkhomedir adcli samba-common-tools Discover and join domain realm discover undercode.local kinit [email protected] realm join --user=administrator undercode.local Restrict login to specific AD groups realm permit -g '[email protected]' realm permit -g '[email protected]' Configure sudoers from AD cat << EOF > /etc/sudoers.d/ad-sudoers %[email protected] ALL=(ALL) ALL %[email protected] ALL=(ALL) /usr/bin/git, /usr/bin/systemctl status EOF
Security implication: Even if a domain admin account is compromised, their Linux root access is blocked by group restrictions stored in AD. Add `ad_access_filter` to `/etc/sssd/sssd.conf` for multi‑factor enforcement.
- Detecting Active Directory Attacks with Sysmon and Event Logs
Most breaches involve AD. Forward these specific event IDs to your SIEM immediately.
Step‑by‑step – Sysmon configuration for credential theft detection:
<Sysmon schemaversion="4.22"> <EventFiltering> <!-- Detect LSASS process access (mimikatz) --> <ProcessAccess onmatch="include"> <TargetImage condition="is">C:\Windows\System32\lsass.exe</TargetImage> <SourceImage condition="not contains">C:\Windows\System32\</SourceImage> </ProcessAccess> <!-- Detect DCSync (Directory Service Access) --> <EventID>4662</EventID> <Data name="Properties" condition="contains">1131f6aa-9c07-11d1-f79f-00c04fc2dcd2</Data> </EventFiltering> </Sysmon>
PowerShell log monitoring – detect anomalous AD replication:
Look for non-DC initiating replication (DCSync)
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4662} |
Where-Object { $<em>.Message -match "1131f6aa-9c07-11d1-f79f-00c04fc2dcd2" -and $</em>.Message -notmatch "CN=NTDS Settings" }
7. Active Directory Disaster Recovery – Backdoor Removal
If an adversary establishes persistence, rapid recovery is essential. The `ntdsutil` snapshot method is the fastest way to roll back compromised AD.
Step‑by‑step – Create and mount AD snapshot without reboot:
ntdsutil
activate instance ntds
snapshot
create
mount {GUID}
copy E:\$SNAP_<GUID_VOLUME>\windows\ntds\ntds.dit C:\AD_Backup\
unmount {GUID}
What this does: Creates a Volume Shadow Copy of the Active Directory database while the server is online. Extract `ntds.dit` and `SYSTEM` hive to recover passwords offline if ransomware encrypts the live DC.
What Undercode Say:
- Key Takeaway 1: Secure AD deployment is not a “set and forget” task – misconfigured delegation and legacy protocols (NTLM, LLMNR) are still the root cause of 80% of enterprise domain takeovers. Every hardening step must be validated through adversary simulation.
- Key Takeaway 2: Active Directory is no longer Windows‑only; hybrid environments with Linux and cloud (Azure AD Connect) introduce new ACL attack paths. Use tools like Purple Knight and BloodHound Enterprise monthly to track “toxic combinations” (e.g., user with DCSync rights + password not required).
The GitHub repository referenced provides an excellent baseline, but security professionals must extend it with detection logic. The most resilient AD forests are those that assume compromise and actively monitor for the “Golden Ticket” and “Skeleton Key” artifacts. Integration with Windows Defender for Identity or open‑source alternatives like Wazuh should follow immediately after domain creation.
Prediction:
Within 24 months, Microsoft will deprecate NTLM entirely in Windows Server, and Kerberos armoring will be mandatory for all domain communications. Attackers have already shifted focus to attacking AD via the cloud – look for abuse of Azure AD Kerberos Tickets (a.k.a. “Golden SAML” and “Silver SAML”) to bypass on‑premises controls. The future of AD security lies in continuous authentication evaluation (Conditional Access) rather than static perimeter controls. Hybrid identity will replace the pure on‑prem DC as the primary security boundary.
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IT/Security Reporter URL:
Reported By: Muhammad Shaban – Hackers Feeds
Extra Hub: Undercode MoN
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