Sophos MDR + Xen Bilişim: 24/7 Comprehensive Protection

The hard truth about endpoint security: detecting an incident is half the problem; responding within minutes — at 3am on a Saturday — is the other half. For organisations that can’t sustain a 24/7 in-house SOC (which is most SMBs and mid-market), Managed Detection & Response (MDR) is the realistic path to enterprise-grade coverage. This article covers what Sophos MDR delivered through Xen Bilişim looks like in practice — what it covers, what it doesn’t, and the realistic SLA.

Why MDR exists

Modern security tools (EDR, XDR, SIEM) generate constant signal. Most signal is benign noise; a small percentage is genuine threat. The work of “watching the signal and acting on the rare critical event” is what a SOC does.

Running an internal SOC needs:

• 3+ security analysts (24/7 coverage requires shift rotation).
• Tier 1 / Tier 2 / Tier 3 escalation paths.
• Continuous training and threat intelligence subscriptions.
• Tooling: SIEM, SOAR, threat hunting platforms.

Realistic annual cost: 300,000+ USD for a small SOC. For an SMB or mid-market organisation, that’s not viable.

MDR transfers this capability to a service provider that runs SOCs at scale and amortises the cost across many customers. Per-user cost typically lands in the 5–20 USD/month range — affordable for the value delivered.

What Sophos MDR delivers

1. 24/7 monitoring. Sophos analysts watch your security telemetry around the clock from regional SOCs.

2. Threat hunting. Active search for indicators of compromise, not just reactive triage of alerts.

3. Incident response. When a real threat is detected, Sophos analysts can take direct action: isolate endpoints, terminate processes, lock accounts.

4. Threat intelligence. Cross-customer learning — patterns seen at one customer feed protection across all.

5. Reporting. Monthly executive reports, quarterly threat landscape reviews, audit-ready documentation.

The two service tiers

Sophos MDR Essentials — monitoring + alerting. Sophos analysts identify threats and provide recommended actions. Your team executes the response.

Sophos MDR Complete — monitoring + alerting + active response. Sophos analysts take direct response actions on your infrastructure under pre-authorised playbooks. Higher cost, lower mean-time-to-respond.

For organisations without an internal IT/security team, MDR Complete is usually the right answer — the response action happens immediately, not after the IT lead picks up the phone.

Where the Xen Bilişim layer adds value

Sophos MDR runs the security operations. Xen Bilişim wraps the service for Turkish customers:

• Onboarding & deployment. Initial Sophos agent deployment, policy tuning, integration with your M365 / Azure tenant.
• Translation layer. Sophos communicates in English; we deliver findings and decision-points to you in Turkish.
• Local incident coordination. When an incident escalates beyond Sophos’s automated response, we coordinate with your team, vendors, and (if needed) Turkish law enforcement.
• KVKK / regulatory alignment. Audit-ready documentation, breach notification process, regulator communication if required.
• Quarterly review. Combined Sophos analytics + Xen field expertise to refine the security posture.

Realistic SLA expectations

• Detection time: Mean time to detect (MTTD) for confirmed incidents typically under 15 minutes for high-severity.
• Response time: Mean time to respond (MTTR) under 30 minutes for MDR Complete.
• False positive rate: ~5% — significantly lower than self-managed EDR because Sophos analysts have cross-customer context.

Who Sophos MDR is right for

• Organisations 25+ users with regulatory scope (KVKK, ISO 27001, PCI DSS).
• Companies that experienced a near-miss security incident.
• Boards demanding “demonstrable 24/7 coverage” without standing up an internal SOC.
• Organisations with growing IT complexity but limited security headcount.

Who it isn’t right for

• Very small organisations (<10 users) without serious regulatory pressure — Defender for Business via M365 Business Premium is usually enough.
• Organisations with mature internal SOCs already running 24/7.
• Edge cases where data residency requires SOC analysts physically in Turkey (Sophos’s analyst pools are global; this is rarely a hard regulatory blocker but worth confirming for highly sensitive sectors).

What a typical week of MDR looks like

For a 100-user mid-market customer:

• ~50,000 raw security events / day flow through the Sophos pipeline.
• ~50–100 events / day trigger initial analyst review.
• ~5–10 events / day are escalated for action (typically auto-isolation + investigation).
• ~1–2 events / month are true critical incidents requiring coordinated response.

You see the executive summary; Sophos absorbs the noise.

Frequently asked questions

Can MDR run on top of existing Microsoft Defender? Yes — Sophos MDR can ingest Defender telemetry. But operating two endpoint agents is rarely worth it. Most customers run Sophos Intercept X + MDR as one stack, or Defender XDR + a Defender-aware MDR (Microsoft has its own DART service).

What happens during an incident on a holiday weekend? The defining moment of MDR. Sophos analysts work shifts; you call the same coordination number any time and reach a human within minutes.

Do we lose control over our endpoints? With MDR Complete, you delegate response actions per agreed playbooks. You can opt-out of any specific action class (e.g., “don’t lock executive accounts without phone confirmation”).

How long until we see value? Onboarding takes 2–4 weeks. The first month is policy tuning. By month 2 the service is operating at full capability.

Bottom line

For SMB and mid-market organisations that can’t sustain a 24/7 SOC, Sophos MDR delivered through Xen Bilişim provides enterprise-grade coverage at a viable cost. The service eliminates the “what happens if we’re hit on Saturday at 3am” anxiety — and that alone is often worth the price. To evaluate MDR fit for your organisation, contact us for a free assessment.