Cybersecurity & Information Security

Active Directory Penetration Testing: Testing and Protection Map

6 min readPublished: August 5, 2026

Professional visual illustration of Active Directory Penetration Testing in the field of Penetration Testing

Quick answer

Active Directory Penetration Testing must only be performed within an approved Scope and Rules of Engagement. The process includes information gathering, controlled verification, evidence, risk assessment, remediation, and retest.

Professional penetration testing is an authorized and defined process, not a collection of commands. Scope, Rules of Engagement, evidence, risk assessment, remediation, and retest are an integral part of the work. This article focuses on Active Directory Penetration Testing and is intended for PT students and Windows Security professionals. The goal is to provide a working methodology that can be applied in practice, professional interviews, and work environments, without settling for a dictionary definition.

The main challenge is that data is almost always partial. Trusts, delegation, ACLs can indicate a direction, but their meaning depends on the time, asset, user, and expected activity. Therefore, we will build the test around an investigative question, required evidence, and a clear criterion for completion.

The practical scenario in the article is: building a Checklist for a lab domain. All examples are lab data or descriptions of processes. When it comes to Penetration Testing, Web, or Cloud, one must only work with explicit authorization, a defined Scope, and the ability to stop the test.

Scope and Architecture

The Active Directory Penetration Testing process is built in stages with stopping points. A goal, Scope, sources, permitted actions, required evidence, roles, and completion criteria are defined. In offensive environments, stop conditions and an emergency channel are added.

Each stage must have a clear Output: an asset map, Timeline, Finding, Rule, Playbook, or report. Moving to the next stage only occurs when the Output is sufficient and reliable; this prevents random work or unauthorized Scope expansion.

Identity and Privilege mapping

The topic 'Identity and Privilege mapping' is a central part of Active Directory Penetration Testing. It is recommended to break it down into three questions: what is the input, what decision is desired, and what evidence is sufficient to justify it. These questions prevent automatic tool use without understanding the objective.

In practice, record trusts, delegation, ACLs, service accounts, tiering, compare them to expected behavior, and define at least one Pivot. The result should be verifiable by another analyst, including limitations and next steps.

Kerberos and Service accounts

The topic 'Kerberos and Service accounts' is a central part of Active Directory Penetration Testing. It is recommended to break it down into three questions: what is the input, what decision is desired, and what evidence is sufficient to justify it. These questions prevent automatic tool use without understanding the objective.

Delegation, GPO and Trusts

The topic 'Delegation, GPO and Trusts' is a central part of Active Directory Penetration Testing. It is recommended to break it down into three questions: what is the input, what decision is desired, and what evidence is sufficient to justify it. These questions prevent automatic tool use without understanding the objective.

Findings, Detection and Remediation

The response to Active Directory Penetration Testing should reduce risk without erasing the evidence still required. Start with a reversible and focused action, confirm ownership and authority, and document the time, performer, and result.

Long-term remediation addresses the root cause: permissions, configuration, Validation, Telemetry, process, or training. After implementation, perform a Retest and monitor for signs of recurrence, rather than just closing a Ticket.

Unique testing points

On this topic, it is recommended to build a focused evidence map in advance. The main testing points are: trusts, delegation, ACLs, service accounts, tiering, attack paths. The list is not an automatic Checklist; each item is chosen because it can link an entity, action, and time or explain legitimate behavior.

trusts: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.
delegation: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.
ACLs: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.
service accounts: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.
tiering: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.
attack paths: Define the expected value, what would be considered abnormal, and what additional source would verify the finding.

If one of the focus areas is not available, document the gap and choose an alternative. For example, if a Process identifier is not stable, you can use time, Host, User, and Parent; if Payload is encrypted, use Metadata, volume, frequency, and TLS/DNS context.

Recommended workflow

Define Scope and one working question regarding Active Directory Penetration Testing.
List the data sources and required evidence: trusts, delegation, ACLs, service accounts.
Create a short Baseline of normal behavior or expected results.
Perform the minimal test in a lab environment and record time, input, and output.
Build a Timeline or comparison table and separate fact from interpretation.
Pivot to an additional source to confirm or refute the initial explanation.
Summarize the decision, limitations, recommended action, and Retest criteria.

Practical Scenario

The chosen scenario is building a Checklist for a lab domain. The purpose of the exercise is not to prove attack capability, but to practice safe collection, comparison, and documentation. Before starting, define simulated data, a time window, and an expected result.

At the end of the exercise, a deliverable that another analyst or tester can review should be submitted: a screenshot or Export of the evidence, a short Timeline, initial hypothesis, corroborating evidence, limitation, and recommendation. When there is insufficient evidence, the correct conclusion is that the scenario was not proven.

Stage	What to perform	Deliverable
Preparation	Define Scope, time, and objective. List which fields or evidence from trusts, delegation, ACLs are expected to appear.	Short test plan
Data Creation	Perform a safe, simulated action related to Active Directory Penetration Testing, without real information or impact on a production system.	Controlled event/Request/Flow
Collection	Collect the raw evidence and context from another source. Verify Time zone, identifiers, and integrity.	Two linked pieces of evidence
Analysis	Write what each piece of evidence proves, what it does not prove, and what the legitimate possible explanation is.	Interim conclusion
Completion	Choose closure, escalation, Finding, or Tuning; add a recommendation and Retest.	Documented deliverable

Practical Checklist

Check and document: Scope and ROE.
Check and document: Test time and source.
Check and document: Request/Response or tool output.
Check and document: Proven impact in the lab.
Check and document: Risk rating.
Check and document: Remediation and Retest.
Note Time zone, tool version, and collection time.
Save the raw data before filtering or changing.
Write what the finding proves and what is still unknown.
Define owner and next action with a deadline.

Common Mistakes

Starting a test without a signed Scope.
Using an aggressive Exploit by default.
Not saving Evidence.
Reporting only on CVSS without context.
Not proposing a practical remediation.
Not performing a Retest.

Summary and CTA

Active Directory Penetration Testing: Testing and Protection Map is a topic that connects technical knowledge with work discipline. Start with a question, collect only relevant evidence, maintain context and time, and choose an action that can be justified and re-tested.

In HPI's Cybersecurity & AI track, these principles are practiced using systems, logs, and labs. A natural progression is to move on to the linked articles, perform the lab exercise, and save the output as part of a professional portfolio.

FAQ

Is it permissible to perform Active Directory Penetration Testing on a public website?

Not without explicit authorization from the system owner. Even a seemingly simple test can change data, trigger defense mechanisms, or be considered unauthorized access.

What do you do when some data is missing?

Document the missing information, check for an alternative source, and reduce the level of confidence. Do not fill in fields with assumptions or present Unknown as normal.

How long should evidence be kept?

The time depends on policy, regulation, cost, and the type of incident. It is important to define Retention, Legal hold, and the ability to export evidence in a verifiable format in advance.

How do you practice without risking a real system?

Use virtual machines, simulated data, CTF, or a dedicated lab. In authorized tests, define Scope, Stop conditions, and backup before starting work.