Penetration testing services
Offensive security integrated into a 360° cybersecurity lifecycle
Turning testing into continuous cyber improvement
In a threat landscape defined by constant change, Atos strengthens operational resilience through focused offensive security. Our penetration testing services simulate real-world adversaries across your digital ecosystem, including networks, cloud environments, Operational Technology (OT) and IoT infrastructures, human factors and Gen AI systems. The insights gained directly enhance your ability to detect, respond and recover. This is not a one-time engagement, but continuous risk reduction embedded in the Atos cybersecurity lifecycle. While traditional penetration testing ends with a vulnerability report, Atos converts offensive findings into measurable security improvement.
Deliverables that enable action
Atos provides clear, decision-oriented reporting designed to support executive and operational stakeholders:
- Executive summary outlining risk and resilience posture
- Detailed technical findings with evidence of exploitation
- Prioritized remediation roadmap
- Business impact assessment and detection mapping
- Where relevant, recommendations for enhancing SOC detection logic
- Optional retesting and operational improvement workshops
Each engagement contributes to measurable risk reduction and stronger security maturity.
Why choose Atos penetration testing?
Realistic adversary simulation
Simulate real-world attackers across modern attack surfaces, including networks, cloud, OT, IoT, human factors and Gen AI systems.
Operationally focused testing
Test detection, response and escalation workflows under realistic conditions to validate how security operations perform in practice.
Business-driven remediation
Translate technical findings into remediation priorities aligned with business impact and operational risk.
Integrated with MDR operations
Directly integrate penetration testing insights into Managed Detection and Response (MDR) operations to strengthen day-to-day defense.
Beyond compliance resilience
Move past point-in-time compliance testing toward continuous operational resilience and long-term risk reduction.
SOC and MDR validation
Validate Security Operations Center (SOC) and MDR detection capabilities in advanced, scenario-driven testing environments.
Our penetration-testing capabilities
Network penetration testing
Assess your IT infrastructure through controlled simulations that reflect authentic attack behavior.
Atos specialists combine advanced automation with in-depth manual analysis to uncover weak configurations, segmentation issues and exploitable vulnerabilities.
Scope includes:
- External and internal network testing
- Perimeter systems, firewalls and VPN gateways
- Active Directory and identity exploitation
- Network segmentation and trust boundary validation
Outcome:
Clear visibility into real attack paths and strengthened preventive controls.
Cloud-penetration testing
As organizations expand into multi-cloud environments, complexity and exposure increase.
Atos identifies vulnerabilities, configuration gaps and privilege escalation paths in AWS, Azure, GCP and containerized platforms.
Scope includes:
- Identity and privilege escalation analysis
- API and application-layer security testing
- Container and Kubernetes assessments
- Multi-cloud environments
Outcome:
Reduced exposure caused by misconfiguration, excessive permissions and cloud-native attack techniques.
IoT and OT penetration testing
Connected systems enhance operational performance while expanding the attack surface.
Atos evaluates embedded systems, industrial networks and connected assets using OT-safe methodologies. Firmware, interfaces and communication protocols are analyzed with operational continuity in mind.
Scope includes:
- Embedded system and firmware analysis
- Industrial protocol and interface testing
- OT-safe execution methodologies
- IoT platform and device security
Outcome:
Greater resilience across safety-critical and operational technology environments.
Social engineering
Human factors remain a primary attack vector.
Atos simulates targeted attack scenarios — including phishing, vishing and physical access attempts — to evaluate awareness and validate escalation procedures.
Scope includes:
- Phishing and vishing campaigns
- Impersonation and on-site access scenarios
- Response chain and escalation validation
Outcome:
Reduced human risk and improved organizational preparedness.
AI penetration testing
The adoption of generative AI introduces new risk vectors, including prompt injection and data leakage.
Atos secures AI-driven applications, agents, and workflows against threats specific to AI systems. Offensive testing is aligned with operational safeguards to support secure innovation.
Scope includes:
- Prompt injection and model manipulation testing
- Workflow and AI agent exploitation scenarios
- Data leakage and unintended model behavior analysis
- Abuse prevention within AI-enabled business processes
Outcome:
Confidence to scale Gen AI initiatives securely through continuous validation and operational controls.
Integration with Atos Managed Security Services ensures that AI-related findings drive durable improvements in defensive capabilities.
Application security testing (including code review)
Applications and their APIs are among the most frequently attacked areas of modern IT environments once the network layer is secured. Atos conducts penetration tests on standard and custom-built business applications. These tests are based on cutting-edge tools and techniques and are used to assess the security of the applications. They are also aligned with internationally recognised standards, such as those established by OWASP and MITRE in order to guarantee that the highest possible standards are met. Where required, application testing is complemented by secure code reviews (i.e. white box penetration tests), enabling detection of vulnerabilities and insecure coding practices that cannot be identified through dynamic testing alone.
The following testing areas may be included in the scope of a project:
- Web-based applications
- Desktop and server applications
- Mobile applications
- Embedded and IoT applications
These services can include secure code reviews (white-box testing), authentication, authorisation, and business logic testing.
Outcome:
The benefits of this approach include reduced application risks, improved code quality and stronger protection of critical digital business processes.
Embedded in the Atos 360° cybersecurity lifecycle
Atos penetration testing is integrated across the cybersecurity value chain, enabling security to evolve alongside your business.
Through optional integration with Atos managed security services, engagements can also support improvements in detection, response and resilience capabilities. Findings lead to sustained improvement.
Prevent
Identify architectural weaknesses, misconfigurations and exposure paths before they can be exploited.
Detect
Where applicable, assess whether SOC and MDR services recognize real attacker techniques and identify opportunities to refine detection logic.
Respond
Evaluate incident response processes, communication channels and coordination in realistic attack scenarios.
Improve
Prioritize remediation based on exploitability and business impact, then retest to confirm measurable progress.
How we make an impact
Strengthening application security across the vendor ecosystem
German car manufacturing company
A global automotive manufacturer required greater confidence in the impact of new and existing vendor applications on its security posture. As part of its digital transformation journey, the organization sought a structured approach to identify, assess and mitigate potential risks introduced across its application landscape.
We worked closely with internal stakeholders to support the evaluation of both new and updated applications. By using targeted threat modelling and conducting in-depth application reviews, we were able to identify and address vulnerabilities of different criticalities early on. We provided clear, actionable mitigation recommendations to resolve the issues. This enabled the customer to integrate security into its validation processes, reduce exposure to third-party risks, and maintain a consistent level of assurance across its environment.
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