Common Active Directory Attack Methods

Common Active Directory Attack Methods Explained

Active Directory (AD) is the central hub for managing users, devices, and security in most businesses. Because of its critical role, attackers often focus their efforts on exploiting vulnerabilities in AD. Understanding these attack methods is the first step in protecting your business from serious breaches.

1. Pass-the-Hash (PtH) Attacks

In a Pass-the-Hash attack, hackers steal the hashed version of a user’s password from one computer and use it to log into other systems, without ever knowing the actual password.

Why it’s dangerous:

Attackers can move laterally across your network using a single compromised account.
Once they gain access to an administrative account, they can control multiple servers and systems.

Example:
A hacker gains access to a low-level employee laptop, extracts the hash of the local admin account, and then uses it to access your file server — all without triggering traditional password alerts.

2. Brute-Force and Password Spraying

Attackers attempt to guess passwords using automated tools:

Brute-force attacks try every possible combination until one works.
Password spraying targets common passwords across multiple accounts to avoid account lockouts.

Why it’s dangerous:

Weak or reused passwords are easily compromised.
Once a single account is compromised, attackers can escalate privileges or access sensitive information.

Example:
An attacker targets a list of users with “Password123” or “Welcome2025” — if an employee uses one of these, the hacker gains access.

3. Privilege Escalation

Once inside AD, attackers often try to gain higher-level permissions, moving from a standard user to an admin or domain admin.

Methods include:

Exploiting misconfigured permissions
Abusing inherited rights from nested groups
Exploiting vulnerabilities in domain controllers

Why it’s dangerous:

With elevated privileges, attackers can add new accounts, access critical servers, or exfiltrate sensitive data.
They can hide their tracks while maintaining persistent access.

4. Kerberos Ticket Theft and Golden Tickets

Kerberos is AD’s authentication protocol. Hackers can steal Kerberos tickets or create “Golden Tickets” to gain virtually unrestricted access.

Golden Ticket attack:

Attacker forges authentication tickets
They can access files, servers, and services as any user
Extremely difficult to detect without proper monitoring

5. Malware Targeting Domain Controllers

Domain Controllers (DCs) are the servers that store AD data and process logins. Malware that infects a DC can:

steal user credentials
manipulate group policies
disrupt authentication
allow attackers to take full control of your network

Example:
Ransomware may target DCs first to lock administrators out, making recovery more complicated and increasing the chances of paying a ransom.

6. Exploiting Weak or Misconfigured Group Policies

Group Policies define security and access rules. Hackers look for:

overly permissive policies
policies that allow local admin rights unnecessarily
outdated settings that bypass modern security measures

Why it’s dangerous:
Misconfigured GPOs can allow attackers to bypass MFA, access critical systems, or propagate malware across the network.

Why Understanding Attack Methods Matters

Knowing these attack methods helps businesses:

identify risks in their AD setup
prioritise security improvements
implement monitoring, alerts, and policies that block attacks before they succeed

Key defenses include:

limiting administrative privileges
enabling multi-factor authentication
monitoring logins and unusual behavior
regular patching and updates
implementing a tiered admin model

Even small businesses face risks — taking proactive measures to secure Active Directory can prevent devastating breaches and downtime.

Common Active Directory Attack Methods