Internal Network Pentest
Modern organizations rely on interconnected systems, on-premises infrastructure, and internal applications that often-become attractive targets for attackers after initial access. Our Internal Network Penetration Testing service identifies weaknesses inside your corporate network that could lead to lateral movement, privilege escalation, data compromise, and full domain takeover.
We simulate real-world internal threat actors, including malicious insiders and attackers who have bypassed perimeter defenses, to provide a complete view of internal security risk.
Our Pentest Methodology
1
Scoping & Planning
We define assessment goals, identify in-scope network segments and systems, clarify access levels, and align the testing approach with your IT and security teams to ensure a safe, well-coordinated engagement.
2
Reconnaissance & Information Gathering
We map the internal environment by identifying hosts, services, domain structures, user accounts, network shares, and high-value assets, building a clear picture of the attack surface.
3
Threat Modeling & Attack Surface Analysis
We analyze Active Directory, network segmentation, administrative paths, legacy systems, and misconfigurations to prioritize likely attack vectors and potential privilege escalation routes.
4
Vulnerability Discovery & Exploitation
We perform controlled exploitation of identified weaknesses, including credential attacks, Kerberos abuses, unpatched systems, insecure protocols, weak permissions, and local privilege escalation opportunities.
5
Post-Exploitation & Risk Assessment
We assess real-world business impact by evaluating lateral movement opportunities, data exposure risks, privilege escalation potential, and overall resilience against internal attacker scenarios.
6
Reporting & Remediation Support
You receive a comprehensive report with an executive summary, detailed findings, CVSS scores, PoC evidence, and prioritized remediation guidance—along with a complimentary retest to verify fixes.
What We Test
Our testing covers all critical areas of web application security
Active Directory Security
Misconfigurations, weak GPOs, insecure ACLs, domain trusts, vulnerable service accounts, outdated domain controllers.
Internal Network Services
SMB, RDP, LDAP, Kerberos, WinRM, SSH, FTP, database servers, legacy protocols, printer services, IoT devices.
Workstation & Server Security
Local privilege escalation, missing patches, insecure software, weak local accounts, misconfigured scheduled tasks & services.
Credential & Authentication Security
Password policies, NTLM/LM usage, Kerberos misconfigurations, credential reuse, MFA gaps, insecure storage of secrets.
Network Segmentation & Access Controls
Flat networks, unprotected VLANs, server segment exposure, unrestricted lateral movement paths.
Privilege Escalation Paths
Weak ACLs, writable service paths, GPO abuse, insecure SCCM/NinjaOne/RMM configurations, domain privilege escalation routes.
Data Exposure Risks
Shared folders, internal portals, unprotected file servers, sensitive data stored in plain text.
Compliance & Standards
Our internal network security assessments help organizations comply with:
Compliance Support
PCI DSS
Internal segmentation testing, vulnerability management
ISO 27001
Annex A: Network & system hardening
HIPAA
Technical safeguards for internal systems
GDPR
Data access and breach risk reduction
SOC 2
Access controls, security monitoring
NIST CSF
Identify, Protect, Detect, Respond
Testing Standards
PTES
Penetration Testing Execution Standard
CIS Benchmarks
Server and workstation hardening
NIST SP 800-115
Technical Security Testing
OWASP ASVS
Network-relevant sections
MITRE ATT&CK
Mapping attack chains
Frequently Asked Questions
Common questions about our web application penetration testing services
Typically 1–3 weeks depending on the network size, number of systems, complexity of AD, and segmentation.
No. Our approach is safe and non-destructive. All risky actions are carefully controlled or executed in coordination with your team.
We usually need a single standard domain user account and internal network access (VPN or on-site). For zero-knowledge assessments, we begin with no credentials.
We test for known vulnerabilities, attack patterns, and misconfigurations. We also simulate advanced techniques but do not perform destructive zero-day exploitation.
Yes — safely and thoroughly. We assess multiple real-world escalation paths while avoiding destructive changes.
Retesting is available upon request and depends on the scope of remediation. We recommend connecting with our team to understand the best retesting approach for your environment.
A full report with executive summary, technical details, PoCs, remediation steps, and an optional presentation to stakeholders.
READY TO EVALUATE YOUR INTERNAL SECURITY?
Schedule a consultation to discuss your internal network penetration testing needs and receive a customized quote.