How Do You Measure the Effectiveness of Your SOC?

MSInfo SOC Team

MSInfo Services

February 8, 20255 min read

Many organizations have a SOC but few can actually measure whether it's working. The metrics you track define the security outcomes you achieve.

One of the most common conversations MSInfo Services has with security leaders is about SOC effectiveness. 'We have a SOC — how do we know if it's actually working?' The uncomfortable answer is that most organizations are measuring the wrong things.

The most commonly reported SOC metrics — total alerts processed, alerts closed, MTTD (Mean Time to Detect), and MTTR (Mean Time to Respond) — are process metrics. They tell you about the activity of the SOC, not about the security outcomes it achieves. A SOC that closes 10,000 alerts per month is not necessarily more effective than one that closes 1,000 — if the 1,000 represent the right threats being detected and properly investigated.

The metrics that actually matter for SOC effectiveness are outcomes-based. False negative rate — what percentage of genuine attacks is the SOC failing to detect? Coverage — what percentage of the environment is generating telemetry that the SOC can see? Dwell time — how long are attackers present in the environment before detection? Mean time to contain — after detection, how quickly are threats isolated to prevent further damage?

Dwell time is particularly significant. Industry data consistently shows that the average dwell time — the period between an attacker's initial access and their detection — is measured in weeks or months. Every day of undetected attacker presence represents additional time for data exfiltration, privilege escalation, and preparation for a final destructive action. Reducing dwell time is one of the highest-impact improvements any organization can make to its security posture.

Testing your SOC's detection capability is essential. Purple team exercises — where a red team (attackers) and blue team (defenders) work together, with the red team executing specific attack techniques while the blue team tries to detect them — provide objective evidence of what your SOC can and cannot see. The results are often sobering, but they provide the data needed to prioritize detection improvements.

MSInfo Services provides SOC effectiveness assessments that go beyond activity metrics to test and measure genuine detection and response capability.