Internal Network Penetration Testing

Overview

Most organizations invest heavily in defending their perimeter from external threats. But perimeter defenses alone are not enough. What happens when that perimeter is breached?

The foundation of a strong security posture is a secure, well-tested internal network. As attackers grow more sophisticated, the threats organizations face from within their environment, whether from compromised credentials, insider threats, or adversaries who have already established a foothold, are just as dangerous as those from outside. The only effective way to understand your internal exposure is to think like an attacker and test accordingly.

An internal network penetration test gives your organization a clear, evidence-based view of what a real adversary could accomplish once inside your network. Redfox Cybersecurity delivers rigorous, objective-based internal network penetration testing that goes far beyond automated vulnerability scans to uncover what truly puts your business at risk.

What is Internal Network Penetration Testing?

Internal network penetration testing is an advanced infrastructure security assessment that simulates the actions of an attacker who has already gained initial access to your network and is working to escalate privileges, move laterally, and reach sensitive assets.

Unlike automated vulnerability scanners, internal network penetration testing replicates the full attack chain an adversary would follow after breaching your perimeter. This includes privilege escalation, lateral movement across network segments, man-in-the-middle attacks, malware distribution simulation, sensitive data exfiltration, and establishing persistence within the environment.

At a minimum, every internal network penetration test covers the following phases:

• Host Discovery
• Assessment
• Exploitation
• Privilege Escalation
• Post Exploitation
• Lateral Movement
• Persistence
• Data Exfiltration

How We Carry Out an Internal Network Pen Test

Our process is rigorous, collaborative, and tailored to your specific infrastructure and business objectives.

1. Scoping

We work closely with your team to define the scope of the engagement, including target systems, testing methodologies, business-specific objectives, and any compliance requirements that must be addressed.

2. Reconnaissance

Our team gathers detailed information about your internal network infrastructure, including its layout, connected devices, active services, and potential entry points that could be leveraged by an attacker.

3. Vulnerability Analysis

We conduct an in-depth analysis of your network infrastructure, including systems, applications, and databases, to identify known vulnerabilities, misconfigurations, and weaknesses in access controls.

4. Exploitation

Our ethical hackers simulate real-world attack scenarios, actively exploiting identified vulnerabilities to gain unauthorized access to internal systems and demonstrate the impact of a successful breach.

5. Privilege Escalation and Lateral Movement

We assess the potential for attackers to escalate privileges and move laterally across network segments, identifying weaknesses in access controls, segmentation, and trust relationships between systems.

6. Reporting and Recommendations

You receive a comprehensive report detailing every vulnerability discovered, its potential business impact, and practical, prioritized remediation recommendations. Our team is available to support your remediation efforts and help implement the security measures needed to strengthen your internal network defenses.