Internal Penetration Testing: Securing Your Internal Network
Introduction
- What is Internal Penetration Testing?
- It's a simulated cyberattack on an
organization's internal network and systems.
- Conducted by ethical hackers (pen
testers) to identify vulnerabilities an attacker with internal access
could exploit.
- Simulates insider threats like
disgruntled employees, errors, and bad policies.
- Helps organizations understand potential attack vectors and their impact on data and systems.
- Addresses the threat of internal
breaches, which can be just as damaging as external attacks.
- Provides a realistic assessment of
existing security controls.
- Helps identify weaknesses in user
permissions and access control policies.
- Demonstrates a commitment to
cybersecurity best practices.
- Informs
and shapes future IT investments and security strategies.
Phases of
Internal Penetration Testing
-
Planning & Preparation:
路
Define scope, objectives,
rules of engagement, and target systems.
路
Gather open-source
intelligence.
-
Reconnaissance:
路
Information gathering about
the target systems and networks.
路
Network mapping:
Documenting IP ranges, hosts, operating systems, open ports, and services.
路
Active Directory Mapping
(if applicable): Enumerating domain structure, user accounts, groups, etc.
-
Vulnerability
Identification:
路
Actively search for
vulnerabilities using automated scanning tools and manual validation.
路
Identify potential security
weaknesses, misconfigurations, and known vulnerabilities.
-
Exploitation:
路
Attempt to exploit
identified vulnerabilities to gain access, elevate privileges, or exfiltrate
data.
路
Simulate real-world attack
scenarios.
-
Post-Exploitation:
路
After successful
exploitation, analyze the impact, identify high-value targets, and simulate
further actions like data exfiltration
路
Analysis & Reporting:
路
Document findings, provide
remediation guidance, and assess risks.
路
Present a technical report
for the IT team and an executive summary for management.
-
Remediation:
路 Fix the identified vulnerabilities based on the report and recommendations. Retest to ensure the fixes are effective.
Techniques Used
- Brute-force attacks (password guessing)
- Privilege escalation
- Database controls testing
- Man-in-the-middle (MitM) attacks
- Phishing and social engineering
- Communication eavesdropping
- Inspecting internal accounts for sensitive
information
- Port scanning
- Testing hardware and software vulnerabilities