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Pentesting Active Directory and Windows-based Infrastructure

Pentesting Active Directory and Windows-based Infrastructure

By : Denis Isakov
4.9 (14)
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Pentesting Active Directory and Windows-based Infrastructure

Pentesting Active Directory and Windows-based Infrastructure

4.9 (14)
By: Denis Isakov

Overview of this book

This book teaches you the tactics and techniques used to attack a Windows-based environment, along with showing you how to detect malicious activities and remediate misconfigurations and vulnerabilities. You’ll begin by deploying your lab, where every technique can be replicated. The chapters help you master every step of the attack kill chain and put new knowledge into practice. You’ll discover how to evade defense of common built-in security mechanisms, such as AMSI, AppLocker, and Sysmon; perform reconnaissance and discovery activities in the domain environment by using common protocols and tools; and harvest domain-wide credentials. You’ll also learn how to move laterally by blending into the environment’s traffic to stay under radar, escalate privileges inside the domain and across the forest, and achieve persistence at the domain level and on the domain controller. Every chapter discusses OpSec considerations for each technique, and you’ll apply this kill chain to perform the security assessment of other Microsoft products and services, such as Exchange, SQL Server, and SCCM. By the end of this book, you'll be able to perform a full-fledged security assessment of the Microsoft environment, detect malicious activity in your network, and guide IT engineers on remediation steps to improve the security posture of the company.
Table of Contents (13 chapters)
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Enumerating services and hunting for users

To continue our enumeration, the next step will be to identify available services, file and SQL servers, and the privileged users’ activity in the domain. As we discussed at the beginning of this chapter, our target is to get access to critical data and services in the compromised environment.

SPN

Service Principal Names (SPNs) are the names by which a Kerberos client uniquely identifies instances of a service for a given Kerberos target computer. There is a comprehensive list of known SPNs for Active Directory held by PyroTek3[20]. We can use them to better understand what services are present in the domain and use Kerberos authentication.

We can enumerate SPN in the domain by using the setspn utility or SharpView with the following commands to find users and computers with SPNs:

Get-DomainComputer -ServicePrincipalName "*"
Get-DomainUser -SPN

To get all SPNs with the setspn utility, we can run the following...

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