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Security Testing

Breach and Attack Simulation (BAS)

Breach and Attack Simulation is an advanced security testing approach that uses automation to continuously simulate real-world attack techniques against an organization's infrastructure, providing ongoing validation of security controls.

What Is BAS?

BAS platforms automate the process of launching simulated attacks across multiple vectors — including network, endpoint, email, and web — to test whether existing security tools and processes detect and block them. Unlike point-in-time assessments, BAS runs continuously, providing up-to-date security posture visibility.

How BAS Works

  1. Attack Scenario Library: Pre-built playbooks modeled after known threat actor techniques
  2. Automated Execution: Simulated attacks run automatically against production or staging environments
  3. Detection Analysis: Results show which attacks were detected, blocked, or missed
  4. Remediation Guidance: Actionable recommendations to close identified gaps

Use Cases

  • Validating SIEM detection rules and alerting
  • Testing EDR effectiveness after deployment
  • Compliance verification and audit preparation
  • Security control benchmarking after infrastructure changes

Benefits Over Traditional Testing

Traditional TestingBAS
Periodic assessmentsContinuous validation
Manual effortAutomated execution
Limited scopeComprehensive coverage
Point-in-time snapshotOngoing visibility

Related Terms

Related Reading

Glossary

Adversarial Exposure Validation (AEV)

Adversarial Exposure Validation is a security testing approach that measures how exposed an organization is to real attacker behavior by safely validating exploitable paths, weak controls, and detection gaps.

Glossary

Security Control Validation

Security control validation is the process of verifying that preventive, detective, and response controls work as intended against relevant attack techniques.

Blog

Top 10 Awesome Open-Source Adversary Simulation Tools

Breach and Attack Simulation (BAS) also known as Adversary Simulation is an emerging IT security technology equipping the proactive approach to the way we look at organizational security. Open-source BAS tools like Caldera and Atomic Red Team are utilised by security professionals to assess their security infrastructure's detection capabilities against various different kind of attacker behaviours.

Guide

Breach and Attack Simulation (BAS)

Breach and Attack Simulation (BAS) as a technology, defined by Gartner, 'that allows enterprises to continually and consistently simulate the full attack cycle against enterprise infrastructure, using software agents, virtual machines, and other means..'. Over the last two decades, the crucial need to protect increasingly digitised enterprises from cyberthreats has driven international spending on cybersecurity products and services to multi-billion dollars per annum. However, adversaries are still able to breach an organisation's security defences.The problem is apparent: Security is tricky; misconfigurations and vulnerabilities are common, leading to breaches.

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