Overview

In today’s hyperconnected enterprise environments, attackers don’t stop at the perimeter—once inside, they exploit weak internal controls, unpatched systems, and excessive user privileges to infiltrate critical assets. Many organizations focus solely on external defenses, overlooking risks like rogue devices, misconfigured Active Directory, or legacy systems that enable lateral movement and data theft. Internal Network Penetration Testing exposes these blind spots by simulating insider threats or compromised accounts, hardening your internal infrastructure against breaches that firewalls alone can’t prevent.

What is Internal Network Penetration Testing?

Internal Network Penetration Testing is a controlled, adversarial simulation where ethical hackers assume the role of an attacker with initial access to your internal network (e.g., via phishing, stolen credentials, or a compromised device). Our experts methodically exploit vulnerabilities in systems, services, and protocols to identify paths for privilege escalation, lateral movement, and data exfiltration, providing actionable insights to lock down your most sensitive environments.

Key Focus Areas

We target risks critical to internal network security, aligned with MITRE ATT&CK and NIST guidelines, including:

✅ Privilege Escalation (Windows/Linux misconfigurations, sudo abuses)
✅ Lateral Movement (Pass-the-Hash, Kerberoasting, RDP exploits)
✅ Active Directory Vulnerabilities (Group Policy misconfigurations, stale accounts)
✅ Endpoint Security Gaps (Unpatched software, weak AV/EDR)
✅ Sensitive Data Exposure (Unsecured file shares, databases, backups)
✅ Network Segmentation Failures (Flat networks, VLAN hopping risks)
✅ Legacy Protocol Abuse (SMBv1, LLMNR, NTLM relay attacks)
✅ Internal Service Misconfigurations (DNS, DHCP, SNMP)
✅ Credential Theft & Cache Dumping (Mimikatz, LSASS exploits)
✅ Physical Security Bypasses (Unauthorized device access, rogue IoT devices)

How We Execute Internal Network Penetration Testing

Our adversarial approach mimics real-world attackers to uncover hidden risks:

1. Initial Access Simulation

   • Start with low-privilege access (e.g., standard user credentials) to replicate a compromised insider or breached account.

2. Network Enumeration

   • Map internal subnets, domain controllers, file servers, and IoT devices using tools like Nessus, BloodHound, and CrackMapExec.

3. Vulnerability Exploitation

   • Exploit unpatched CVEs (e.g., EternalBlue, Zerologon) and misconfigurations to gain elevated privileges.

4. Lateral Movement Testing

   • Test Pass-the-Ticket, WMI exploits, and PowerShell remoting to pivot between systems.

5. Active Directory Attack Chains

   • Abuse Kerberos tickets, Golden Ticket attacks, and Group Policy Object (GPO) hijacking.

6. Data Exfiltration Scenarios

   • Simulate theft of sensitive data via DNS tunneling, HTTP smuggling, or encrypted C2 channels.

7. Post-Exploitation Analysis

   • Identify crown jewel assets (e.g., PCI databases, HR systems) and assess breach impact.

8. Segmentation & Zero Trust Validation

   • Test firewall rules, NAC policies, and microsegmentation effectiveness.

9. Prioritized Reporting

   • Deliver a risk-ranked roadmap with remediation steps, hardening guides, and detection strategies.

10. Cleanup & Retesting

    • Remove all implants, restore systems, and validate fixes post-remediation.

Our Methodologies
We align with industry-leading frameworks, including:
✅ MITRE ATT&CK Enterprise Matrix
✅ NIST SP 800-115
✅ PTES (Penetration Testing Execution Standard)
✅ Cyber Kill Chain
✅ PCI DSS Internal Network Testing Requirements

Why Choose Internal Network Penetration Testing?

🔒 Certified Red Teamers: OSCP, CREST, and CISSP-certified experts with 10+ years in network exploitation.
🔒 Real-World Adversary Emulation: Tactics mirroring APT groups like FIN7 and Lazarus.
🔒 Zero False Positives: Manual validation of every finding with proof-of-concept exploits.
🔒 Compliance Alignment: Meet GDPR, HIPAA, ISO 27001, and SOC 2 requirements.
🔒 Proven Results: Uncovered 2,500+ internal vulnerabilities in 2023, including critical flaws in Fortune 500 networks.

Turn Your Internal Network from a Liability into a Fortress
Schedule a Free Internal Risk Assessment