The penetration testing service

Find the weaknesses before attackers do

Our ethical hackers simulate real-world attacks on your networks, applications and infrastructure, so you can fix what matters most.

Overview

See your environment through an attacker's eyes

Microsoft Intelligent Security Association member

Vulnerabilities are inevitable, but exploited vulnerabilities are avoidable. Threat actors are constantly probing for the misconfigurations, weak controls and unpatched systems that give them a foothold in your environment.

BUI penetration testing puts our certified ethical hackers in the attacker's seat. We safely exploit weaknesses across your networks, applications and infrastructure to show you exactly what a real breach would look like, and give you a prioritised roadmap to close the gaps.

Our Approach

Penetration testing in action

Scope & Reconnaissance

Map the attack surface

We work with you to define clear objectives, rules of engagement and target systems. Our testers then gather intelligence on your environment, enumerating assets, services and entry points, to build an accurate picture of your exposure before any exploitation begins.

Exploitation

Safely prove the risk

Using the same tools and techniques as real adversaries, our ethical hackers attempt to exploit identified weaknesses, chaining vulnerabilities, escalating privileges and moving laterally, all under controlled conditions that protect your production systems and data.

Reporting

Prioritise what matters

You receive a clear, actionable report that ranks findings by real business risk, not just severity scores. Each issue includes reproduction steps, evidence and specific remediation guidance, plus an executive summary your leadership can act on.

Retest & Assurance

Confirm the fix

Remediation is only complete when it's verified. After your team addresses the findings, we retest the affected systems to confirm the vulnerabilities are truly closed, giving you documented assurance for auditors, boards and customers.

What We Test

Coverage across your environment

Whether you need to satisfy a compliance requirement or validate a critical system, we tailor the engagement to your risk profile.

Network Infrastructure

Internal & external

We probe your perimeter and internal networks for exposed services, weak segmentation, misconfigurations and paths an attacker could use to reach your crown-jewel systems.

Web & Mobile Applications

Application layer

We test your applications and APIs against the OWASP Top 10 and beyond, including injection, broken access control, authentication flaws and business-logic vulnerabilities.

Cloud & Identity

Azure & Microsoft 365

We assess your cloud configurations, identity controls and conditional access policies to uncover privilege-escalation paths and misconfigurations across your Microsoft estate.

“A penetration test isn't about finding fault; it's about giving you the clarity to invest your security effort where it counts.” Willem Malan · Chief Technology Officer, BUI

Our Credentials

Why choose BUI for offensive security?

Certified Ethical Hackers

Our testers hold industry-recognised offensive-security certifications and follow globally accepted methodologies, so every engagement is rigorous, repeatable and defensible.

Business-Risk Reporting

We translate technical findings into business language, ranking issues by real-world impact so your leadership can make informed, cost-effective decisions.

Full-Service Security Partner

Findings don't end with a report. As a managed security provider, we can help you remediate, monitor and defend, closing the loop between testing and protection.