Problem
Out-of-the-box SIEM rules are written for an average environment that does not exist. Without a deliberate process, detection content decays into a mix of noisy rules analysts ignore and silent rules nobody validates.
Approach
Treating detections as engineered products with a lifecycle: a use case starts from threat research or an incident, gets mapped to ATT&CK, is built against validated log sources, tested with simulated attack behavior, tuned against real-environment noise, and reviewed on a schedule.
Findings
- Every detection needs an owner, a test and a documented response step, otherwise it is a liability, not a control.
- ATT&CK coverage mapping keeps the conversation honest about what the SOC can and cannot see.
- Tuning is where most of the value lives; writing the first version of a rule is the easy part.