Managed SIEM for Microsoft Sentinel – 24/7 Detection, Triage & Response
CyberStash delivers a fully Managed SIEM for Microsoft Sentinel that turns alerts into decisive action. Our 24/7 security operations team monitors, investigates, and responds to real threats across identity, endpoint, cloud, and email — so you get outcomes, not noise.
Designed for mid-market, enterprise, and regulated organisations, we run Microsoft Sentinel as a high-performing SOC: tuning detections, hunting advanced threats, and guiding response with clarity and confidence — without the cost and complexity of building it yourself.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.
Why Running Microsoft Sentinel
Is Harder Than Deploying It
Microsoft Sentinel is powerful, but deploying it is the easy part. Operating it effectively — 24/7, at scale, and under real attack conditions — is where most organisations struggle.
The result is a platform that looks impressive on paper but delivers inconsistent outcomes in practice. Security teams spend time managing alerts instead of reducing risk, while executives assume coverage exists — until an incident proves otherwise.
Microsoft Sentinel is a platform. Security outcomes require people, process, and continuous execution.
Alert Overload
Sentinel generates large volumes of alerts across identity, endpoint, cloud, and email. Without continuous tuning and expert triage, security teams become overwhelmed — missing real threats in the noise.
Specialist Skills Gap
Effective Sentinel operations require detection engineering, KQL expertise, threat hunting, incident response, and automation skills. Hiring and retaining this mix of talent is difficult, expensive, and increasingly unrealistic.
24/7 Coverage Is Hard to Sustain
Attacks don’t happen during business hours. Maintaining around-the-clock monitoring, escalation, and response without burnout or gaps is one of the biggest operational challenges for internal teams.
Tools Don’t Respond — People Do
Sentinel detects signals. It does not investigate context, determine impact, coordinate response, or guide recovery. Without experienced analysts behind it, Sentinel becomes a dashboard — not a defence capability.
How CyberStash Operates Microsoft Sentinel
We run Microsoft Sentinel through a structured operating model designed for real-world attack conditions.
Most providers monitor alerts. CyberStash operates the entire detection lifecycle.
Collect
We ensure high-value telemetry is flowing from identity, endpoint, cloud, email, and critical infrastructure — not just “everything available,” but what actually matters.
Detect
Sentinel analytics are tuned and augmented to focus on real attack paths, reducing false positives while improving signal fidelity.
Investigate
Alerts are validated by experienced analysts who correlate activity across domains to understand scope, intent, and impact — not just severity labels.
Respond
Where authorised, we execute containment actions through Microsoft security controls and provide clear, prioritised remediation guidance.
Tune
Detections, thresholds, and playbooks are continuously refined based on what we observe in your environment, not static templates.
Report
We deliver clear reporting that explains what happened, why it mattered, and what to do next — for both technical teams and executives.
What’s Included in Our Managed SIEM Service
CyberStash delivers a complete, end-to-end Managed SIEM service for Microsoft Sentinel. Every engagement is designed to move beyond alert monitoring and deliver real detection, investigation, and response outcomes.
Everything we deliver is focused on reducing risk, improving response, and strengthening your security posture — not generating more alerts.
24/7 Monitoring & Incident Triage
Our SOC continuously monitors Microsoft Sentinel alerts across identity, endpoint, cloud, and email. Alerts are reviewed, validated, and prioritised by experienced analysts to ensure attention is focused on genuine threats — not background noise.
Incident Investigation & Response
When an alert escalates, our analysts conduct structured investigations to determine scope, impact, and attacker intent. We correlate activity across Microsoft security telemetry and guide response with clear, actionable steps.
Threat Hunting
We proactively hunt for attacker behaviour that bypasses standard analytics, using hypothesis-driven techniques and Sentinel-native queries to uncover stealthy or emerging threats.
Detection Engineering & Continuous Tuning
Sentinel analytics are continuously refined to improve accuracy over time. We tune thresholds, suppress false positives, and develop custom detections aligned to your environment, projects, and risk profile.
Automation & Containment
Where authorised, we leverage Microsoft security controls to execute containment actions such as endpoint isolation, account revocation, and malicious email removal — reducing time to containment during active incidents.
Reporting & Remediation Guidance
We provide clear, outcome-focused reporting for both technical teams and executives. Reports include incident summaries, threat trends, performance metrics, and prioritised remediation recommendations.
Managed SIEM Service Tiers
CyberStash offers three Managed SIEM service tiers designed to align with different levels of security maturity, operational demand, and risk exposure. Each tier follows the same core operating model — with increasing depth, responsiveness, and proactive defence.
Essentials
Foundational 24/7 Sentinel Monitoring & Response
Best for:
Organisations that need reliable, always-on monitoring and incident response without the overhead of a full SOC.
What it delivers:
- 24/7 monitoring and alert triage
- Daily review of critical Sentinel alerts
- Incident investigation and response guidance
- Standard automation and containment actions
- Continuous baseline tuning to reduce false positives
- Quarterly reporting and recommendations
- Included breach response retainer
Outcome:
Clear visibility, faster response, and reduced alert fatigue — without hiring additional staff.
Advanced
Proactive Detection, Threat Hunting & Co-Managed SOC
Best for:
Mid-sized and growing organisations that require deeper detection, regular threat hunting, and closer collaboration with security specialists.
What it delivers (everything in Essentials, plus):
- Increased alert review frequency
- Monthly threat hunting activities
- Custom detection rule development
- Enhanced analytics tuning cadence
- Monthly reporting with deeper incident analysis
- Regular remediation guidance and review sessions
Outcome:
Improved detection accuracy, earlier threat discovery, and stronger alignment between Sentinel and your risk profile.
Active Defence
Full SOC Augmentation for High-Risk & Regulated Environments
Best for:
Enterprises and regulated organisations with complex attack surfaces, governance requirements, and low tolerance for risk.
What it delivers (everything in Advanced, plus):
- Near real-time critical alert review
- Weekly threat hunting operations
- Priority detection engineering and tuning
- Advanced containment and response coordination
- Dedicated security advisor
- Executive-level reporting and briefings
- Expanded breach response support
Outcome:
A fully operated, high-performing SOC capability that delivers continuous protection, rapid response, and strategic oversight.
Trusted and Certified to the Highest Standards
CyberStash is independently certified to ISO 27001 and SOC 2, proving our commitment to the highest standards of security, compliance, and trust.
Client Satisfaction
Managed SIEM for Microsoft Sentinel – 24/7 Detection, Triage & Response
Microsoft Sentinel is a powerful SIEM — but visibility alone doesn’t stop threats. Most organisations quickly discover that once Sentinel is deployed, the real challenge is operating it: reducing alert noise, validating incidents, tuning detections, and responding fast enough to prevent business impact.
CyberStash delivers a Managed SIEM for Microsoft Sentinel that transforms raw telemetry into actionable security outcomes through 24/7 monitoring, analyst-led investigation, threat hunting, and response automation. We help organisations strengthen resilience without building an internal SOC — and without leaving Sentinel to drift into dashboards and false positives.
Why Running Microsoft Sentinel Is Harder Than Deploying It
Enabling Microsoft Sentinel is straightforward. Running it effectively is not. Sentinel spans identity, endpoint, cloud, email, and SaaS — which means detection quality depends on the right data sources, the right analytics logic, and ongoing tuning as your environment changes.
Without continuous operational ownership, teams face alert overload, inconsistent triage, and gaps in coverage across Microsoft 365, Azure, Entra ID, Defender, and third-party log sources. CyberStash closes that gap by operating Sentinel as a living security capability — not a static deployment.
How CyberStash Operates Microsoft Sentinel
CyberStash follows a disciplined operating model that aligns security operations with real-world attack behaviour and enterprise expectations: Collect → Detect → Investigate → Respond → Tune → Report.
We validate telemetry, tune analytics rules, enrich investigations with context, and deliver structured outcomes that reduce risk over time. This approach ensures Sentinel becomes more accurate, more valuable, and more aligned to your risk profile — rather than generating endless alerts.
24/7 Monitoring, Triage & Incident Investigation
Our SOC continuously monitors Microsoft Sentinel alerts and incidents across identity, endpoint, cloud workloads, email, and SaaS activity. Alerts are triaged by experienced analysts who validate suspicious behaviour, correlate activity across multiple data sources, and determine scope and impact.
Instead of forwarding every alert, we focus on delivering confirmed security incidents with clear context, recommended actions, and escalation based on business risk — helping your team act quickly and confidently.
Detection Engineering & Continuous Analytics Tuning
Strong detection outcomes require more than default rules. CyberStash continuously improves your Sentinel detections by tuning thresholds, suppressing known-benign activity, and strengthening coverage for common attacker behaviours such as credential access, persistence, lateral movement, and data exfiltration.
Our team builds and refines analytics using Sentinel-native capabilities including KQL-based detections, analytics rules, entity mapping, incident grouping, and contextual enrichment to reduce false positives and increase signal quality.
Threat Hunting for Advanced and Stealthy Attacks
Not all attacker behaviour triggers an alert. Threat hunting helps detect what analytics rules miss — including low-and-slow activity, living-off-the-land techniques, and misuse of legitimate administrative tools.
CyberStash performs proactive threat hunting using hypothesis-driven methods across Microsoft telemetry sources, helping detect threats earlier and reduce dwell time.
Response Automation & Containment Through Microsoft Security Controls
A Managed SIEM should not stop at “identify.” CyberStash supports response automation and containment using Microsoft-native controls and playbooks to accelerate action.
Where authorised, we help execute actions such as isolating endpoints, disabling compromised accounts, blocking malicious indicators, and supporting email remediation workflows — reducing time to containment and limiting blast radius during active incidents.
Microsoft Security Ecosystem Coverage
Microsoft Sentinel is most effective when integrated with Microsoft’s broader security stack. CyberStash helps maximise outcomes across Microsoft security telemetry and operational workflows, including Microsoft Defender XDR, Entra ID, Microsoft 365, and Azure.
We also support onboarding and management of relevant third-party log sources where required — ensuring unified visibility across hybrid and multi-platform environments.