Internal Network Penetration Testing

Internal network penetration testing simulates the perspective of an attacker who has already breached your perimeter — whether through a phishing email, compromised credential, or supply chain attack. Starting from a non-privileged internal position, our testers attempt to move laterally through your network, escalate privileges, and achieve objectives such as domain administrator access, access to sensitive file shares, or simulated data exfiltration. The assessment maps every attack path from initial compromise to your most critical assets, helping you understand exactly how an insider threat or post-breach attacker would navigate your environment.

Active Directory is the nervous system of most corporate networks and the primary target of attackers operating inside the perimeter. Attacks like Kerberoasting, AS-REP Roasting, Pass-the-Hash, and BloodHound-mapped attack paths allow attackers with minimal privileges to systematically escalate to Domain Admin. Once domain admin is achieved, an attacker has effectively complete control over your organization's identity infrastructure — meaning all systems, all users, and all data. Studies show that in the average corporate network, an attacker can escalate from a standard user account to Domain Admin in less than 20 minutes using freely available attack tools.

BugFoe's internal network assessments follow the PTES methodology and are conducted with a domain user account to simulate realistic threat scenarios. We use BloodHound and SharpHound to enumerate Active Directory and visually map privilege escalation paths. Our team tests credential exposure through Responder, password spray attacks against common weakness patterns, and SMB relay attacks against unpatched systems. All findings include attack path diagrams that clearly illustrate the chain of steps required to reach each critical objective, making it easy for your team to prioritize and remediate the highest-impact findings first.