EDR keeps the lights on, but some parts are still hiding in the dark.

Even top-tier EDRs miss stealthy tradecraft, but our collection of custom MDR rules lifted detections this year, and integrated playbooks built into our Platform slash dwell time to minutes.

Why Even the Best EDR Misses Modern Attacks

Endpoint tools are built for speed and silence. To keep users happy, in many cases, they trust signed system files, shorten very long command lines and give routine-looking events a low score. Attackers lean into those settings. Yes, they still run living-off-the-land binaries such as mshta.exe and rundll32.exe, but that is only the opening act. The same blind spots hide Windows Defender tampering, exfiltration techniques, quiet downloads, domain enumeration, RDP tunnelling, shadow-copy deletion and more. CISA and other agencies warn that this full spectrum of maneuvers can slip past default EDR and XDR policies.

Our MDR capabilities fill that void. The rule set covers every stage of the MITRE ATT&CK chain, from recon and execution, through defense evasion, privilege escalation and exfiltration. Because the raw telemetry is already there, we do not need extra agents. we simply apply research-driven logic that turns low-priority noise into high-value alerts before attackers can move laterally, steal data or cut backups.

CYREBRO Cyber Research and Response Unit: The MDR engine

Our Cyber Research and Response Unit actively works to flip that script. Every week our specialists track fresh CVEs, threat-group chatter, and red-team tradecraft. Those insights become dozens of new MDR rules, scripts, and automated playbooks that plug straight into the CYREBRO cloud platform. The result is an analytics layer that:

• Maps to every MITRE category from initial access to impact.
• Correlates process, registry, network, and user context in real time.
• Hard-fails on any obfuscation or masquerading, no matter the file reputation.

Real-world lift in true positives

We looked at the first third of this year January through April to gauge additional impact:

In plain terms, every one of those 70-80 policy-violation or misconfiguration events, together with the 15-20 pen-test detections and 10-15 full IR cases, exists only because MDR logic pulled them out of the noise, revealing activity clients would never have seen on the default EDR feed. As fine-tuning continues that ratio keeps climbing.

Our clients do more than receive protection. They power it. Every incident detail they share feeds straight into our research pipeline, so a detection sharpened for one environment shields the entire community. Joining CYREBRO is holding a golden ticket to collective defense.

What our MDR rules catch that top-tier EDRs don’t

Among dozens we track, here are four real-world techniques that slipped past at least one of SentinelOne, CrowdStrike or Microsoft Defender, CYREBRO spotted them all immediately:

• Single-line base-64 PowerShell downloader.
• Remote mshta.exe pull of an external HTA payload.
• Renamed cmd.exe launched as svchost32.exe.
• Hidden PowerShell session exfiltrating ZIP archive.

Why do we see them? Our Cyber Research and Response Unit keeps a living arsenal of advanced detection rules that translate fresh threat-research into focused analytics. The moment those rules detect recognizable patterns in the telemetry, they surface a clear, actionable alert.

From detection to response in one pipeline

Detection without action is only half the job. Because our MDR response engine lives inside CYREBRO’s Centralized Security Operations Platform and its Security Data Lake, every alert can launch a tailored playbook. As an official SentinelOne distributor we know the platform inside out, so we leverage its open APIs to isolate hosts, kill processes, deploy collectors, or roll back changes, free from the limits of vendor-preset responses.

• Isolate the host through the EDR API.
• Collect volatile evidence and forward it to the analyst timeline.
• Quarantine or delete rogue executables.
• Roll back ransomware-induced Shadow Copy deletions.
• Push a one-off collector for deeper triage.

All actions are version-controlled, tested across thousands of managed endpoints and executed under human oversight. Analysts view the same console, the same timeline and the same evidence, just with minutes-old response already in motion.

Key takeaways

• Even the best EDR tools can miss activity when trusted binaries run encoded commands.
• CYREBRO’s MDR rules cut through that noise by decoding, enriching and correlating telemetry in the cloud.
• In the first four months of 2025 the rules surfaced 69 true-positive threats that would otherwise stay hidden.
• Automation in the CYREBRO Platform converts every alert into an immediate playbook action, reducing dwell time from days to minutes.
• Ongoing threat research keeps the rule set current with the latest CVEs and adversary tactics.