Internal Network Pen Testing

Overview

Internal network testing simulates what an attacker can achieve after gaining initial access, whether through phishing, compromised VPN credentials, or a malicious insider. It reveals how far an attacker could move laterally, escalate privileges, and reach sensitive resources.

The engagement focuses heavily on Active Directory security, network segmentation effectiveness, and the exploitability of internal services to give a realistic picture of your internal posture.

Methodology

We begin with network reconnaissance to map topology, domain controllers, and high-value targets, then identify vulnerable services, misconfigurations, missing patches, and default credentials across servers, workstations, and network devices.

An in-depth Active Directory assessment analyzes GPOs, trust relationships, and delegation to find attack paths to Domain Admin, followed by controlled exploitation, privilege escalation, and lateral movement that demonstrate access to critical business assets.

The report includes full attack-path visualization, risk-prioritized findings, Active Directory hardening recommendations, and a strategic remediation roadmap.

Attack techniques

Active Directory testing covers Kerberoasting, AS-REP Roasting, DCSync, Golden and Silver Ticket attacks, ACL abuse, and trust relationship abuse.

Lateral movement and protocol abuse include Pass-the-Hash, Pass-the-Ticket, WMI and PSRemoting execution, LLMNR/NBT-NS poisoning, SMB relay, and credential harvesting from memory, shares, and Group Policy Preferences.

What you gain

You understand the real risk from malicious insiders or compromised accounts, verify that network segmentation actually prevents lateral movement, and receive specific Active Directory hardening guidance.

Internal network testing is scoped as a custom engagement with a fixed price; a typical engagement runs two to four weeks, and every finding is tracked from discovery through a verified retest to a certificate.

Frequently asked questions