Offensive Security Specialists

We know the attacker. Because we are the attacker.

CCV certified, with proven experience in high-value environments. From web to IoT, from cloud to physical access - we test everything that matters.

Blackbox | Greybox | Whitebox | CCV Certified
Why Zolder

Cloud & Identity Experts

Our specialists break into Azure, Entra ID and Active Directory environments daily, from conditional access bypass to tenant takeover.

Manual & In-Depth

No tool-only scans. Every engagement includes intensive manual testing by experienced security professionals.

Applied Security Research

We investigate whether your systems can be abused, from ordering free products to bypassing payment logic.

Proven. In the field.

Our approach:
think like the attacker.

We combine pentesting with applied security research. That means not just finding technical vulnerabilities, but also investigating how your systems can be abused. From privilege escalation in cloud environments to bypassing business logic and payment flows.

  • Entra ID / Azure AD attack paths and tenant takeover
  • Active Directory privilege escalation & domain compromise
  • Infrastructure pentesting, internal and external
  • Applied security research: business logic, payment flows, fraud
  • Microsoft 365 configuration & hardening reviews
Offensive Services

Attack as a defence strategy

Our pentesters have proven access to high-security environments, digitally and physically. We don't sell reports, we deliver insight.

Defensive Services

Defence from an attacker's perspective

Monitoring, incident response and hardening - built by people who know how attackers operate. Our defensive services are developed from offensive experience.

Research & Training

Share knowledge, build capability

We publish research, deliver training and speak at conferences. Knowledge gained during pentests, we share back with the community.

Ready to test your security?

Get in touch with our team for a no-obligation conversation about your security challenges.