Alert Fatigue, Coverage Gaps, and a Tool Stack Nobody Can Afford to Run
Most mid-market security teams face a contradiction: they operate in highly regulated industries that demand continuous monitoring, but they cannot staff, fund, or sustain the infrastructure that continuous monitoring actually requires. The result is an organization that looks compliant on paper and is invisible to threats in practice.
Alert Fatigue Is Eating Your Team
A modern environment generates hundreds of thousands of log events per day. SANS research consistently places alert-to-investigation ratios in the hundreds-to-one range — every uninvestigated alert is a potential incident that goes undetected.
The 24/7 Coverage Gap Is a Liability
Threat intelligence from Mandiant, CrowdStrike, and other sources repeatedly shows intrusions escalate most aggressively outside business hours — evenings, weekends, holidays — precisely when detection capacity is thinnest.
In-House SOC Is a Strategic Trap
A credible 24/7 SOC requires six to eight full-time analysts across three shifts, plus threat intelligence, SIEM engineering, and leadership. Industry benchmarks place the fully-loaded cost well into seven figures before a single alert is triaged.
Tool Sprawl Is the Integration Tax
Six vendors, six consoles, six renewal cycles, six points of failure, and no one vendor who owns the outcome. SENTRY MDR eliminates the Integration Tax: one program, one team, one SLA.
What MDR and SOC-as-a-Service Actually Mean
These terms are used imprecisely across the industry. Before evaluating any provider, it’s worth understanding what the distinctions actually mean for your organization’s risk posture.
Managed Detection and Response (MDR)
MDR is an outsourced security service that combines technology — typically a SIEM, EDR, and/or XDR platform — with human analysts who actively monitor your environment, investigate alerts, and respond to confirmed threats. The key word is “response.” A mature MDR program includes active containment, host isolation, and remediation guidance delivered in real time — not simply a report of what happened. SENTRY MDR is built on this model: detection is automated and enriched with threat intelligence; response is human-led and documented to compliance standards.
SOC-as-a-Service
SOC-as-a-Service delivers the function of a full Security Operations Center — continuous monitoring, triage, investigation, escalation, and reporting — as a managed program rather than an internal department. Where MDR tends to be technology-led, SOC-as-a-Service is program-led: you are buying the analyst team, the operational processes, the compliance documentation, and the continuous improvement cycle, with the technology underneath it. Armorstack SENTRY provides both under a single engagement.
How MDR Differs From a Standard MSSP
A traditional managed security services provider (MSSP) typically monitors and alerts — your team is expected to investigate and respond. MDR providers, and Armorstack as a Managed Intelligence Provider, investigate and respond directly. The operational burden shifts from your internal team to SENTRY. This distinction is critical for regulated industries, where the gap between detection and containment directly determines regulatory exposure and breach notification obligations.
MDR vs. DIY SIEM
Running your own SIEM — Splunk, Microsoft Sentinel, IBM QRadar, or another platform — is not a substitute for MDR. A SIEM is a tool; MDR is a program that includes a SIEM as one component. DIY SIEM deployments in mid-market organizations frequently suffer from undertuning, understaffing, and underdocumentation. Managed SIEM, delivered as part of SENTRY, solves all three: the platform is tuned by security engineers who operate it full time, it is staffed 24/7, and compliance evidence generation is built into the workflow.
Converged, Deterministic, Always-On
Armorstack is not an MSSP. Armorstack is a Managed Intelligence Provider — a distinction reflecting a fundamentally different operating model. SENTRY MDR is delivered from a 24/7 Security Operations Center staffed by 100+ security professionals with domain expertise across your regulated vertical, spanning capabilities most organizations currently operate as separate, disconnected functions.
24/7 SOC Monitoring
Continuous monitoring of your environment — cloud, on-premises, hybrid, and OT/IT — with analyst coverage across all three shifts, 365 days a year. No coverage gaps, no “we’ll look Monday morning.”
Managed SIEM
Armorstack engineers handle deployment, tuning, log source onboarding, rule development, and optimization — retention and correlation configured to your compliance framework from day one.
Managed Detection & Response
When the SIEM surfaces an alert, SENTRY analysts investigate — real investigation, not auto-escalation — and execute a documented response: host isolation, credential invalidation, blocking rules.
Proactive Threat Hunting
Hypothesis-driven hunts search for adversaries who have established persistence without triggering rules — the capability that separates a mature program from tool-monitoring.
Dark Web Monitoring
Continuous scanning of threat actor forums, paste sites, and criminal marketplaces for evidence of your organization’s data — before it’s weaponized against you.
Incident Response
Forensic analysis, root cause determination, regulatory notification support, and post-incident review — delivered under your existing SENTRY engagement, not a surprise invoice.
AI Security Observability & Cyber-Physical Convergence
The Observability Gap
Enterprise AI deployment is outpacing security teams’ ability to monitor AI behavior — what Armorstack calls the Observability Gap. SENTRY’s AI security observability program includes prompt injection detection, shadow-AI and AI-asset discovery, and excessive-agency detection today. Model inversion detection and AI supply-chain compromise detection are on SENTRY’s roadmap as the program’s AI security capabilities continue to expand.
Cyber-Physical Convergence: SENTRY + CITADEL
Most MDR providers monitor your network. Armorstack monitors your building, too. Physical security telemetry — access control events, video analytics anomalies, and building system status from CITADEL — feeds directly into the SENTRY SOC, so a suspicious after-hours access event correlated with anomalous network behavior surfaces as one threat indicator, not two disconnected tickets.
What the SENTRY MDR Program Includes
Every SENTRY MDR engagement is scoped to your environment. The following represents the full program capability set; your specific configuration is determined during the scoped assessment.
24/7/365 SOC monitoring with dedicated analyst coverage across all shifts
Managed SIEM — deployment, tuning, log source onboarding, rule development, continuous optimization
Managed EDR/XDR integration — platform management and alert triage
Proactive threat hunting — hypothesis-driven campaigns on a defined frequency
Dark web monitoring — credential exposure, data leakage, and brand references
Incident response — active containment, forensic analysis, notification support, post-incident review
AI security observability — shadow-AI/AI-asset discovery, prompt injection detection, excessive-agency monitoring
Cyber-physical correlation — CITADEL telemetry ingested into the SOC
Compliance evidence generation — log retention, alert documentation, audit packages for HIPAA, PCI-DSS, CMMC, NIST
Threat intelligence enrichment — commercial and open-source feeds applied to your risk profile
Monthly executive reporting — non-technical threat posture summary for board or C-suite
Quarterly program review — hunting hypothesis review, coverage assessment, roadmap update
VERITY advisory integration — optional vCISO/vCIO overlay for governance and board reporting
SENTRY MDR for Regulated Verticals
Mid-market organizations in regulated industries face a specific combination of threat exposure and compliance obligation that general-purpose MDR providers are not built for. SENTRY is purpose-built for these environments.
Healthcare
Compliance driver: HIPAA’s Audit Controls standard (§ 164.312(b)) requires documented, continuous monitoring of ePHI access — most healthcare organizations currently address it only partially.
Threat driver: Healthcare is the most-targeted sector for ransomware globally. Patient safety is directly affected when clinical systems are disrupted.
SENTRY delivers: HIPAA-aligned audit log management, continuous ePHI access monitoring, anomaly detection, and incident documentation structured for OCR review.MDR for Healthcare — full page →
Financial Services
Compliance driver: PCI-DSS Requirement 10 mandates log monitoring and review; GLBA’s Safeguards Rule requires ongoing risk assessment and monitoring. Examiners increasingly treat the absence of a documented program as a finding.
Threat driver: Account takeover, business email compromise, and ransomware timed to quarter-end filing periods for maximum pressure.
SENTRY delivers: PCI-DSS Requirement 10-aligned log monitoring, anomalous privileged access detection, dark web credential monitoring, and exam-ready documentation.
Defense Contractors
Compliance driver: CMMC 2.0 Level 2 requires NIST SP 800-171 Audit and Accountability (AU) and Incident Response (IR) control families — required for contract award and tested by C3PAOs.
Threat driver: DIB contractors are among the most actively targeted sectors by well-resourced, patient nation-state actors skilled at evading commodity detection tools.
SENTRY delivers: CMMC-aligned continuous monitoring, CUI access monitoring, nation-state threat intelligence integration, and C3PAO assessment documentation.SOC for Defense Contractors — full page →
Manufacturing
Compliance driver: NIST SP 800-82 guidance for ICS/SCADA security, increasingly cited by cyber insurance underwriters as a baseline expectation. DIB manufacturers also face CMMC.
Threat driver: Manufacturing is one of the most-targeted sectors for ransomware; OT disruption risks production shutdown, safety incidents, and physical equipment damage.
SENTRY delivers: OT/IT converged monitoring, ICS/SCADA event ingestion and anomaly detection, and threat hunting calibrated for manufacturing-targeted ransomware lateral movement.
How SENTRY MDR Maps to Continuous Monitoring Requirements
This is not a complete compliance map — SENTRY addresses detection and response requirements, not the full framework. Your VERITY vCISO engagement covers the complete compliance posture. This table helps security and compliance teams identify where SENTRY’s detection program produces evidence that supports audit and examination requirements.
| Framework | Relevant Control / Requirement | How SENTRY Addresses It |
|---|---|---|
| HIPAA Security Rule | § 164.312(b) Audit Controls — record and examine activity in systems containing ePHI | Managed SIEM ingests and retains audit logs from EHR systems and clinical endpoints; anomaly detection on ePHI access patterns; audit log review documented to OCR standards |
| HIPAA Security Rule | § 164.308(a)(6) Security Incident Procedures | Documented incident response procedures, active containment, and post-incident review delivered as part of the SENTRY program |
| PCI-DSS v4.0 | Req. 10.4 — audit logs reviewed for anomalies; Req. 10.7 — control failures detected and reported promptly | 24/7 analyst review of SIEM alerts; automated detection of log source failures with escalation; documented review cadence |
| PCI-DSS v4.0 | Req. 12.10 — an incident response plan exists and is ready to be activated | SENTRY incident response capability and playbooks; tabletop exercise support available through VERITY advisory |
| NIST SP 800-171 / CMMC 2.0 | AU.3.045 — alert on audit log failure; AU.3.046 — review logs for inappropriate activity; IR.2.092 — track/document/report incidents | Automated alerting on log source failures; structured audit log review; incident tracking with regulatory notification support |
| NIST SP 800-171 / CMMC 2.0 | IR.2.093 — test the incident response capability; IR.3.098 — track, document, and test the plan | Annual tabletop exercises and quarterly detection testing; documented results for C3PAO assessment |
| NIST CSF 2.0 | Detect (DE) — continuous monitoring for cybersecurity events; Respond (RS) — execute incident response activities | Full DE and RS function coverage through SENTRY MDR; VERITY advisory maps outputs to CSF reporting requirements |
| GLBA Safeguards Rule | 16 CFR Part 314 — monitor and test safeguards; designate a qualified individual to oversee the program | Continuous monitoring with documented testing cadence; VERITY vCISO can serve as the designated qualified individual where the rule permits |
| SOC 2 Type II | CC7.2 — monitor system components for anomalies indicative of malicious acts, disasters, or errors | Continuous SIEM-based monitoring with documented anomaly detection and analyst response; evidence package suitable for auditor review |
Complete compliance posture — governance, policy, risk assessment, and vendor management — is addressed through VERITY advisory engagements. Explore the VERITY portfolio →
Managed Intelligence, Not Managed Alerts
Managed Intelligence Provider
Not a tool vendor, not a monitoring reseller. SENTRY doesn’t hand you alerts — it delivers outcomes: confirmed threat containment, compliance evidence, and a security program that matures over time.
100+ Professionals, 9 Service Lines
SENTRY analysts aren’t generalists monitoring an undifferentiated queue — they operate alongside VERITY advisory, CORE infrastructure, and CITADEL physical security teams within the same organization.
Converged Cyber-Physical Security
To our knowledge, the only Managed Intelligence Provider delivering genuine cyber-physical convergence as a standard capability. SENTRY and CITADEL are built by the same organization, operated by the same team.
The 90-Day Proof
Validate MDR outcomes before committing to a multi-year engagement. If SENTRY delivers, you continue. No pressure and no obligation to sign before you’ve seen results.
Armorstack serves regulated organizations nationally — healthcare systems, financial institutions, defense contractors, and manufacturers across the United States operate under SENTRY. The SOC operates 24/7 regardless of client geography, pairing the detection depth and program maturity of a dedicated national provider with the responsiveness of a partner who knows your environment.
Explore the Full SENTRY Detection & Response Stack
This page is the hub for Armorstack’s detection and response program. Each link below goes deeper on a specific capability, pricing model, comparison, or vertical configuration.
Program & Pricing
Comparisons & Decisions
Vertical Programs
Frequently Asked Questions About MDR and SOC-as-a-Service
Start With 90 Days. No Long-Term Contract Required.
Armorstack SENTRY delivers 24/7 SOC monitoring, managed SIEM, MDR, proactive threat hunting, and incident response as a single converged program — built for regulated mid-market organizations. The 90-Day Proof lets you validate program outcomes before committing to a multi-year engagement.
The threat to your environment is continuous. Your security program should be too.
Serving regulated organizations nationally.
877-890-5508 | [email protected]