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Penetration testing is our core business. We simulate real attacks on your infrastructure (applications, networks, systems, APIs), backed by Fenrir, our AI engine hosted in Europe, to reveal the weaknesses real adversaries could exploit.
+$10.5T
World cyber damage in 2025
+$814B
Worldwide ransomware profit
72%
of organizations report that penetration testing helped prevent an actual security breach
72%
of organizations report that penetration testing helped prevent an actual security breach
Our pentesters are led by a pentester ranked in the global top 2% (TryHackMe.com).
A penetration test is a controlled, ethical simulation of a cyberattack, designed to identify system weaknesses, assess how far a real attacker could go, and determine what must be fixed urgently or strategically.
Define scope and test type (Black Box, Grey Box, White Box)
Gather information and identify entry points
Detect known and unknown vulnerabilities
Simulate real attacks
Assess lateral movement potential
Remove test traces
Fenrir runs reconnaissance, vulnerability scanning and simple exploitation on its own. Fast and repeatable, to track your exposure.
Fenrir orchestrates the attack, a pentester validates every finding before it goes into the report: verified attack chains, not raw alerts.
Our pentesters run the engagement, Fenrir assists. Atypical perimeters, business logic, red teaming: the scenarios no tool covers on its own.
A penetration test, or pentest, simulates a real attack against your systems (web applications, networks, APIs, endpoints) to identify exploitable vulnerabilities before an attacker finds them. You receive a prioritised report: what is vulnerable, how severe, and how to fix it.
The price depends on the scope: number of applications, network size, depth of testing. Every engagement is quoted for your context. Sentinel Access, fully automated, suits simple and recurring needs; Sentinel Advanced and Sentinel Expert involve our pentesters.
Both, to different degrees. Sentinel Access is automated and tracks your exposure without waiting for the next audit. Sentinel Advanced adds our pentesters' review and validation on every finding. Sentinel Expert hands the engagement to our pentesters, assisted by Fenrir, for complex scenarios (red team, critical business logic) that automation alone does not cover.
These terms describe how much information the tester is given. In black box, the expert starts with no access, like an external attacker. In grey box, they have an account or limited rights, to simulate a user or partner. In white box, they have access to the code and architecture, for the most thorough audit.
An external pentest assesses what an attacker sees from the Internet: sites, exposed services, data leaks. An internal pentest assesses what they could do once inside: lateral movement, server access, privilege escalation. In practice you often start with external. Sentinel Access automatically scans your external perimeter; Sentinel Expert runs the tailored internal pentest. Between two tests, Sentinel Monitoring keeps an inventory of your network and scans it for vulnerabilities every night.
A pentest is a snapshot at a point in time: it becomes partly outdated as soon as your system changes. A one-off test therefore benefits from being complemented by continuous monitoring. Sentinel automates penetration testing continuously, keeping your posture up to date between bespoke audits.
Our tests rely on recognised frameworks: OWASP for web applications, PTES for the process, NIST and MITRE ATT&CK for attack-technique coverage. Every engagement produces a traceable, documented report: vulnerabilities, evidence, severity and a prioritised remediation plan.
NIS2 does not explicitly name the 'pentest', but it requires risk-management measures including regular assessment of the effectiveness of security measures. Penetration testing is one of the recognised ways to provide that evidence. Our Auditor helps you connect your tests to your obligations in a traceable, documented way.
Yes. Based in Orp-Jauche, in Walloon Brabant, we carry out penetration tests for companies across Belgium (Wallonia, Brussels and Flanders) as well as in the European Union. Much of a pentest is performed remotely; we work on site when the scope requires it.
How Varden handles penetration testing
Three levels, from automated testing to a pentest led by our pentesters
Sentinel Access is automated: Fenrir, our AI engine hosted in Europe, runs reconnaissance, vulnerability scanning and simple exploitation. Sentinel Advanced is AI-automated, then reviewed and validated by our pentesters. Sentinel Expert is led by our pentesters, assisted by Fenrir, for complex scenarios (red team, critical applications).
OSINT (Open Source Intelligence) means analysing only the information about your organisation that is publicly accessible, what anyone, including an attacker, can find without ever touching your infrastructure. No intrusion: open sources only.
Online result, nothing to install. Ethical report, auditable score out of 100, actionable recommendations.
