For years, antivirus software was the standard way businesses protected their computers. Install it, keep it updated, and it would catch known viruses before they caused harm. Today’s threats, however, are far more sophisticated. Attackers use techniques designed specifically to avoid traditional antivirus detection.
That is why many organizations are adopting endpoint detection and response, commonly called EDR. Understanding the difference between the two can help business leaders make better decisions about protecting their devices and data.
How Traditional Antivirus Works
Traditional antivirus relies primarily on signatures, which are digital fingerprints of known malicious files. When a file matches a known signature, the antivirus blocks or quarantines it.
This approach works well against known threats, but it has important limitations:
- It struggles to detect new or modified malware that has no existing signature
- It often misses “fileless” attacks that run in memory or use legitimate system tools
- It provides limited visibility into what happened before or after a threat was detected
- It typically cannot investigate or respond to an attack in progress
What Is EDR?
Endpoint detection and response is a security technology that continuously monitors activity on endpoints, such as laptops, desktops, and servers, to identify suspicious behavior. Instead of only looking for known malicious files, EDR analyzes what programs and users are doing.
For example, EDR may detect when:
- A document unexpectedly launches a scripting tool
- A program begins encrypting large numbers of files
- An account attempts to disable security settings
- A device communicates with a known malicious server
Key Differences Between EDR and Antivirus
Detection Approach
Antivirus focuses on known threats. EDR focuses on behavior, allowing it to detect new and unknown attacks.
Visibility
EDR records detailed activity across endpoints, giving security teams a timeline of events. This helps answer important questions: How did the attacker get in? What did they access? Which other devices are affected?
Response Capabilities
EDR can take action when a threat is detected, such as isolating an infected device from the network, stopping malicious processes, or rolling back changes. This can prevent a single compromised laptop from turning into a company-wide incident.
Threat Hunting
Security professionals can use EDR data to proactively search for signs of compromise that automated tools may have missed.
Why EDR Matters for Small and Mid-Sized Businesses
Some businesses assume EDR is only for large enterprises. In reality, small and mid-sized organizations are frequent targets because attackers expect weaker defenses. Ransomware groups, in particular, often target businesses that rely only on traditional antivirus.
EDR is also increasingly expected by cyber insurance providers and business partners as a baseline security control.
The Importance of Monitoring
EDR generates alerts, but those alerts need to be reviewed and acted upon. Attacks can happen at night, on weekends, or during holidays. Without someone watching, even the best EDR tool may not stop an attack in time.
Many businesses pair EDR with a managed detection and response service, where security professionals monitor alerts around the clock and respond quickly to threats.
Is It Time to Upgrade?
If your business still relies solely on traditional antivirus, it may be time to evaluate your endpoint protection. Consider whether your current solution can detect unknown threats, isolate compromised devices, and provide the visibility needed to investigate an incident.
InfoSystems provides managed endpoint detection and response with 24/7 monitoring to help businesses stop threats before they spread. Contact us to learn how EDR can strengthen your security.
