Automated security detection assurance system with rule-as-code management and integrated posture testing

A computer-implemented method for validating security detection capabilities, comprising:

• storing a plurality of detection rules in a version-controlled repository, each detection rule comprising an injector specification and a watcher specification;
• automatically executing, by a processor, the injector specification to generate simulated security data;
• transmitting the simulated security data through a security detection pipeline comprising a plurality of security tools and a security information and event management (SIEM) system;
• monitoring, by the processor, outputs from the security detection pipeline for detection results corresponding to the simulated security data;
• comparing the detection results with expected outcomes defined in the watcher specification;
• and
• generating an alert when the detection results fail to match the expected outcomes.

A security detection validation system, comprising:

• a manager controller comprising a processor and a memory, the manager controller configured to orchestrate automated testing of security detection rules;
• a plurality of subordinate machines configured to execute simulated security events under control of the manager controller;
• a rule management component comprising software instructions stored in the memory and executed by the processor of the manager controller, the rule management component configured to maintain detection rules as code in a structured format, wherein each detection rule includes test injection logic and expected result validation logic;
• an automated deployment component comprising software instructions stored in the memory and executed by the processor of the manager controller, the automated deployment component configured to propagate detection rules from the rule management component to a security information and event management (SIEM) system;
• and
• a monitoring component comprising software instructions stored in the memory and executed by the processor of the manager controller, the monitoring component configured to verify that simulated security events generated by the subordinate machines produce expected detection alerts in the SIEM system and generate maintenance notifications when detection rules fail validation testing.