TIP · 7 min read

EDR Tuning: Real Value from CrowdStrike, Defender and SentinelOne

Every EDR demos beautifully. The gap between the demo and a SOC that actually trusts its EDR is weeks of policy tuning, custom detection content and response automation. Here is that work, vendor-agnostic.

Set prevention policy like you mean it

Leaving the sensor in detect-only 'to be safe' is how ransomware gets to finish. Move to prevention in stages.

ML prevention at 'moderate' fleet-wide, 'aggressive' on servers and VIP endpoints
Enable script control, credential-theft protection and ransomware rollback where available
Every exclusion is attack surface — scope it to path + hash + signer and review quarterly
Sensor tamper protection and uninstall token on, with no exceptions

Write custom detections for your environment

Vendor coverage is generic; your risky behaviour is specific.

Custom IOAs (CrowdStrike) / custom detection rules (Defender) / STAR rules (SentinelOne) for LOLBins in your context
Alert when admin tools run from unusual parents — PsExec spawned by a browser, for instance
Map every rule to ATT&CK and tag severity so triage can prioritise
Version-control rule content and push it via API, not by clicking in the console

Make real-time response actually real time

The point of EDR is contain-in-seconds, not a nicer alert.

Pre-authorise network containment for confirmed-malicious verdicts through SOAR
Build Real Time Response / Live Response scripts for the routine jobs: pull a file, kill a process, dump persistence, collect a triage pack
Auto-isolate on high severity plus high confidence; require an analyst click for medium
Rehearse the containment path monthly — credentials, connectivity, rollback

Watch your own coverage

Track sensor health obsessively: out-of-date sensors, reduced-functionality mode, endpoints that have not checked in for a week. An EDR blind spot is exactly where an attacker wants to land.

Tools mentioned

CrowdStrike FalconMicrosoft Defender for EndpointSentinelOneVelociraptorMITRE ATT&CKSplunk SOAR

⟩ takeaway

An EDR earns trust through staged prevention policies, environment-specific custom detections, pre-authorised real-time containment and relentless sensor-health monitoring — never through its default configuration.

⟩ keep reading

Mobile Malware in 2026: How It Gets In and How to Stay Safer

Spyware, banking trojans and sideloaded RATs — how modern mobile malware lands on a device, the tools that detect it, and the habits that keep you off the target list.

Phishing Defense That Actually Works

AiTM kits, QR 'quishing' and callback scams beat old training. What actually lowers real risk: phishing-resistant auth, a detonation layer on the inbox, and drills that mirror current tradecraft.

Splunk Detection Tips: From Noisy Alerts to Real-Time Signal

SPL patterns, accelerated data models and tstats tricks that turn a slow, noisy Splunk into a near-real-time detection engine — with snippets you can paste in today.