Source: Feedly Blog
Author: Nigel Boston
URL: https://feedly.com/ti-essentials/posts/are-we-exposed-the-cti-fusion-playbook-for-end-to-end-exposure-validation
ONE SENTENCE SUMMARY:
CTI Fusion turns adversary intelligence into evidence-based exposure answers via layered validation, governance, scoring, remediation tracking, and regression.
MAIN POINTS:
- Leadership’s key question is whether adversary behaviors succeed today, not intelligence coverage.
- Exposure means behavior executes without visibility, detection, realistic testing, containment, or retesting.
- CTI Fusion coordinates CTI, Threat Hunting, Detection Engineering, Red Team, and SOC validation.
- Telemetry validation verifies required logs exist, are centralized, enriched, and reliably queryable.
- Detection validation ensures analytics trigger with actionable context and manageable signal-to-noise.
- Behavioral validation reproduces real adversary tradecraft, avoiding simplistic test artifacts.
- Operational validation checks SOC runbooks, escalation authority, containment actions, and response timeliness.
- Regression validation periodically retests behaviors to prevent silent degradation from environmental changes.
- CTI-owned Gap Registry governs findings with ownership, severity, remediation plans, timelines, and retest cadence.
- Exposure Confidence Model scores five domains 0–2, producing bands for executive-ready posture reporting.
TAKEAWAYS:
- Convert intelligence into testable hypotheses that specify systems, signals, and response SLAs.
- Treat validation as an end-to-end chain; any broken layer implies remaining exposure.
- Maintain a single system-of-record Gap Registry to drive remediation accountability and trend reviews.
- Quantify posture using 0–10 confidence scores and bands to communicate residual risk clearly.
- Build durability through scheduled regression testing tied to major changes in telemetry, detections, or operations.