08 / 09

Internal Network Penetration Testing

We test from inside the perimeter, simulating an attacker who already has a foothold. Lateral movement, privilege escalation, Active Directory attack paths, and whether your network segmentation actually holds.

Internal Network Penetration Testing illustration

Testing Checklist

Every engagement covers these critical security areas.

Internal host and port discovery across in-scope ranges
SMB, NFS and file share permission review
Active Directory enumeration and attack path mapping
Kerberoasting and AS-REP roasting
Unconstrained and constrained delegation abuse
NTLM relay and credential replay
Local and domain privilege escalation
Password policy and credential reuse testing
Internal database and management interface exposure
Unpatched internal service identification
Network segmentation and zone isolation testing
Internal certificate and service misconfiguration review

Testing Methodology

A structured, repeatable process that ensures thorough coverage and actionable results.

STEP 01

Access and Scoping

Agree how we reach the internal network and which ranges, domains and systems are in scope. Access method is confirmed during scoping rather than assumed.

STEP 02

Discovery and Enumeration

Map what is actually reachable from the assumed-breach position: live hosts, open services, shares, management interfaces, and trust relationships between systems.

STEP 03

Credential and Privilege Attacks

Test for weak and reused credentials, exposed service accounts, Kerberos attack paths including Kerberoasting and AS-REP roasting, delegation abuse, and relay opportunities.

STEP 04

Lateral Movement

Pivot between hosts using recovered credentials and misconfigurations, chaining findings the way an attacker would rather than reporting them in isolation.

STEP 05

Segmentation Validation

Test whether the network zones that are supposed to be isolated actually are. Where a compliance standard requires segmentation testing as a discrete result, it is reported separately.

STEP 06

Reporting and Retest

Every finding carries reproduction steps, the attack path it enabled, and remediation direction. One free retest within one month of the v1.0 report, delivered as v2.0.

Want to scope your internal network pentest engagement? Both founders take the discovery call.

Framework Alignment

Our methodology is aligned with industry-recognized security frameworks for thorough coverage and compliance readiness.

PTESNIST SP 800-115MITRE ATT&CKOWASP WSTG v4.2

Compliance Coverage

PCI
PCI DSS v4.0.1
11.4.2 and 11.4.3: internal and external penetration testing at least annually and after significant change
ISO
ISO 27001:2022
A.8.8: Management of technical vulnerabilities. A.8.29: Security testing in development and acceptance
SOC
SOC 2
CC4.1: Separate evaluations. CC7.1: Vulnerability detection
RBI
RBI Master Direction
RBI/2023-24/107 section 26: penetration testing at least once in 12 months by independent security experts

Deliverables

What you walk away with at the end of every engagement.

01

Technical report with reproduction steps per finding

02

Attack path narrative showing how findings chain together

03

Executive summary for non-technical stakeholders

04

CVSS v3.1 severity scoring per finding

05

Segmentation test results where in scope

06

One free retest within one month of the v1.0 report, delivered as v2.0

Ready to secure your internal network?

Pentest packages from INR 74,999 (~$900 / ~€830). Includes consulting hours + 1 free retest within one month. Both founders on every engagement: Rathnakara (OSCP) leads testing, Ashok handles delivery + compliance.