October 16, 2025

Why businesses without EDR are prime targets for attackers

By Datto
CybersecurityEndpoint Detection and Response (EDR)

When threat actors identify an environment without EDR, they see a prime opportunity. No one is watching for unusual processes or analyzing endpoint behavior. That gap makes exploitation easy.

A zero-day exploit can land without detection, a remote access trojan can blend into normal network traffic and even a ransomware loader can stay hidden for weeks.

However, the first intrusion is only the beginning. From there, attackers escalate privileges, create persistence and disable basic defenses. By the time a traditional antivirus system flags anything, the damage is already in motion.

What changes when EDR is in place

The moment an EDR solution is deployed, the attack surface becomes hostile to intruders. Each action on the endpoint is tracked and scored against behavioral baselines. Malicious code that tries to inject into legitimate processes gets flagged instantly. Attempts to escalate privileges trigger alerts. And if lateral movement is detected, the endpoint can be isolated in seconds, containing the threat.

The result is that attackers lose time and freedom. They can no longer lie dormant or quietly prepare an attack. Instead, they are forced to work under pressure, often abandoning their efforts once they realize their activity is being watched and disrupted.

Why traditional defenses and prevention fall short

Firewalls, antivirus and intrusion prevention systems were designed for a simpler time. They recognize signatures, block familiar threats and filter known bad traffic. That approach worked when attacks were predictable. Today’s attackers no longer follow those rules. Modern tactics are designed to bypass everything traditional tools rely on.

  • Ransomware now uses double extortion: Attackers steal sensitive data before encrypting files, so even backups don’t solve the problem.
  • Zero-day exploits move fast: Vulnerabilities are weaponized before patches are available, giving attackers an early advantage.
  • Phishing is AI-driven: Fake messages now match the tone, grammar and style of real business communication, making them harder to spot.
  • Fileless attacks bypass signature-based defenses. Instead of dropping malicious files, attackers inject code directly into memory, which AV tools never see.
  • Living-off-the-land (LOTL) techniques abuse trusted tools. Legitimate utilities like PowerShell or WMI are hijacked to carry out malicious actions. To older defenses, these look like normal administrative activity.

These new methods are dismantling what once served as the backbone of security. For SMBs, this means no environment is safe. For MSPs, a single compromise can spread across multiple clients, amplifying the damage.

Traditional tools vs. EDR

Here’s how EDR compares to traditional defenses:

CapabilityFirewallsAntivirusIntrusion preventionEDR
Blocks known threats
Detects unknown or zero-day threatsLimited
Tracks abnormal behavior in real time
Responds automatically (isolation, containment)
Provides forensic insight and remediation guidanceLimited

EDR does not replace these tools but strengthens them. Firewalls and antivirus block the obvious while EDR watches what happens when something new or disguised slips through.

How Datto EDR raises the bar

Datto EDR delivers the power of enterprise-grade protection without the complexity. Built by veterans of the U.S. Air Force Cyber Emergency Response Team (AFCERT), it was first proven inside Fortune 500 companies before being refined for MSPs and MMEs.

With patented threat-hunting technology, Datto EDR flips the old model of waiting for known threats by combining behavioral detection, real-time response and global intelligence into a system that actively disrupts attackers.

Here are nine ways Datto EDR keeps you safe:

1. Detects the unknown

Analyzes every action against normal behavior. Unknown files are judged by what they do, not how they look. Even fileless or obfuscated attacks lose the ability to hide.

2. Responds in real time

Suspicious activity triggers immediate action. Endpoints are isolated before threats can spread, containing incidents that would otherwise spiral.

3. Keeps business running

Containment happens without halting operations. Teams investigate and remediate while the rest of the environment stays protected and productive.

4. Ransomware rollback

Provides the ability to roll back files and systems to a clean state after a ransomware attack. Even if encryption starts, rollback restores operations quickly, minimizing downtime and preventing costly data loss.

5. Cuts through the noise

Reduces false positives and provides clear, actionable guidance. Its Smart Investigate feature automatically enriches alerts with context, helping with faster investigations.

6. Learns from everywhere

Telemetry from thousands of environments feeds into Datto EDR. Each attack observed globally strengthens detection locally.

7. Lightweight and efficient

Designed to run without draining system resources. Endpoints stay protected without slowing down users, which makes adoption seamless.

8. Supports cyber insurance and compliance

Provides detailed logs and reports that align with security frameworks, making it easier for businesses to meet regulatory standards. These same capabilities help organizations satisfy cyber insurance requirements, proving they have the controls in place to qualify for coverage and lower risk.

9. Independently proven

Independent testing by Miercom confirmed that Datto EDR can stop advanced threats, including zero-day exploits and ransomware, where other tools fail.

Turn awareness into action this October

October is as good a time as any to pause and evaluate how well your defenses stand up to modern threats. Awareness is not only about recognizing risks but taking steps to close the gaps. Datto EDR shows you how to shut the door. This Cybersecurity Awareness Month bring home a solution that makes attackers think twice and keeps your business safe.

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