Skip to content

•

•

Palo Alto PAN-OS Critical RCE Vulnerability CVE-2026-0300
1300 24 Cyber
Get in touch
Search icon
Get in touch
Find the Weaknesses Attackers Exploit from Within

Internal Networks Penetration Testing

Once an attacker gains a foothold inside your environment, the internal network often provides the greatest opportunity for escalation, lateral movement and access to sensitive systems. Internal Networks Penetration Testing helps you understand how far an attacker could progress if perimeter controls are bypassed or a user account is compromised.

Submit your scope
Find the weaknesses attackers see first

External Networks Penetration Testing

Your external network is one of the most visible parts of your attack surface. Internet-facing systems, services and applications are constantly scanned by threat actors looking for weaknesses they can exploit.

Submit your scope

What is Internal Networks Penetration Testing?

▪ This can include:

Internal network segments
Active Directory environments
User and service accounts
Internal servers and applications
File shares and data repositories
Network devices and infrastructure
Management and administrative interfaces
Security control effectiveness

Why it Matters?

Most serious breaches involve internal compromise whether through phishing, credential theft, malware or a trusted insider. Once inside, attackers focus on expanding access and locating high‑value assets.

  • Identify weaknesses that enable privilege escalation
  • Assess the impact of compromised user or service accounts
  • Understand how attackers could move laterally across your environment
  • Validate segmentation, access controls and security monitoring
  • Reduce the risk of widespread compromise or data exfiltration
  • Support compliance, assurance and internal risk management programs

What We Assess

Our Internal Networks Penetration Testing engagements are tailored to your environment and objectives, but commonly include assessment of:

  • Internal IP ranges and network segments
  • Active Directory and identity services
  • Authentication and authorisation controls
  • Privilege management and role separation
  • Internal servers and services
  • File shares and sensitive data access
  • Administrative tools and management systems
  • Effectiveness of internal security controls

Our Approach

We take a structured, intelligence‑led approach to testing internal environments, designed to reflect real attacker behaviour while maintaining safety and control.

monitoring
Scoping and Assumed Breach Context

We work with you to define the scope and establish realistic assumptions, such as compromised credentials or workstation access. This ensures testing reflects credible threat scenarios without unnecessary disruption.

incident
Enumeration and Weakness Identification

We map the internal environment to identify trust relationships, misconfigurations, excessive privileges and other weaknesses that could be used to progress an attack.

hunt
Controlled Exploitation and Lateral Movement

Where appropriate, we safely validate findings to determine whether weaknesses can be exploited to gain higher privileges, move between systems or access sensitive assets.

client
Risk-Based Reporting

You receive a clear, practical report outlining the findings, their business impact and recommended remediation steps. We prioritise issues that present the greatest risk and focus on what actions will most effectively reduce exposure.

What You Receive

At the conclusion of the engagement, you will receive:

01

An executive summary for business stakeholders

02

A technical findings report with severity ratings

03

Evidence to support each validated issue

04

Practical remediation guidance

05

A debrief with our consultants to walk through the results

FAQ

Frequently Asked Questions

When Should Internal Penetration Testing Be Performed?

Internal testing should be conducted regularly as part of a broader security assurance program. It is particularly valuable after major changes such as directory upgrades, network redesigns, cloud integration, or following a security incident.

Will Testing Impact Staff or Operations?

Testing is carefully planned and coordinated to minimise disruption. We work with you to define constraints and ensure testing is performed safely and responsibly.

How is This Different From Vulnerability Scanning or Configuration Reviews?

Vulnerability scanning and reviews identify potential issues. Internal penetration testing validates how those issues could be combined and exploited by an attacker to achieve meaningful impact.

Certifications
GIAC Security Essentials (GSEC) 1
GIAC Security Essentials (GSEC) 2
GIAC Security Essentials (GSEC) 3
GIAC Security Essentials (GSEC) 4
GIAC Security Essentials (GSEC) 5
GIAC Security Essentials (GSEC) 6
GIAC Security Essentials (GSEC) 7
GIAC Security Essentials (GSEC) 8
GIAC Security Essentials (GSEC) 9
Contact us

Understand How Far an Attacker Could Go

Identify exploitable weaknesses inside your environment before they are used to escalate access or compromise critical systems.