Why Cybersecurity Needs to Focus More on Investigation

Why Cybersecurity Needs to Focus More on Investigation

And less on just detection and response

When we think about cybersecurity, most of us picture alarms going off, software scanning for viruses, and firewalls keeping the bad guys out. Detection and response are the heavy lifters in any modern security strategy, and rightfully so. They help us spot threats, shut them down quickly, and get back to business.

But here's the catch: Focusing only on detection and response is like driving a car while looking only in the rearview mirror. You might see problems when they've already happened, but you miss the opportunity to understand what caused them and how to avoid them in the future.

In cybersecurity, the investigation phase is where the real magic happens. It's where you dig deeper, look beyond the surface, and ask the tough questions: How did this happen? Why did it work? What does this mean for the bigger picture? The truth is, too many organizations spend most of their time trying to detect and respond to threats without investing in the deeper understanding that comes with a thorough investigation.

The Problem with Over-Focusing on Detection

Imagine you're dealing with a leak in your house. You notice the water rising, so you grab a mop and start cleaning up. But if you never investigate where the leak is coming from, it's only a matter of time before the problem returns. In cybersecurity, detection is the mop, important for stopping immediate damage, but not a long-term solution.

Detection tools such as intrusion detection systems (IDS) and firewalls are crucial. They alert you to threats, catch malicious activities early, and help prevent disaster. But they are reactive by nature. They're designed to find the known problems, the familiar patterns, the stuff that has already been spotted and documented. This is great for stopping the obvious things, such as hackers trying to brute-force their way into a system, but it's not so effective against things that are more subtle or sophisticated.

The real issue? Many of today's most dangerous threats are the ones that don't show up easily on detection radars.

Think about the advanced persistent threats (APTs) that remain hidden for months or the zero-day attacks that exploit vulnerabilities no one even knew existed. These threats may slip right past the detection systems because they don't act in obvious ways. That's why, in these cases, detection alone isn't enough. It's just the first step.

Investigation: Where the Real Insights Lie

This is where investigation comes in. Think of investigation as the part where you understand the full story. It's like detective work: not just looking at the footprints, but figuring out where they came from, who's leaving them, and why they're trying to break in in the first place. You can't stop a cyberattack with detection alone if you don't understand what caused it or how it worked. And if you don't know the cause, you can't appropriately respond to the detected threat. An investigation looks at things such as:

• What vulnerabilities were exploited?
• How did the attackers gain access in the first place?
• What have they done once inside?
• What's the long-term impact: did they steal data, or just cause chaos?

By diving deep into packet-level data, investigators can paint a full picture of an attack, uncovering things that might not be immediately apparent. This level of understanding is essential for defending against future threats. It's about learning from what happened, not just reacting to it.

Why We Miss It, and Why We Shouldn't

There's a reason why so many organizations focus on detection and response. They're easy to measure, and they provide quick, visible results. But here's the thing: When we put all our effort into detecting and responding, we miss out on the bigger lessons that investigation can teach us.
Take this analogy: Imagine trying to prevent a fire by only looking for smoke. If all you focus on is catching the smoke as it rises, you never find out where the fire started. Maybe it was a faulty wire or an unnoticed spark in the attic. You're reacting, but you're not solving the root cause.

The same goes for cybersecurity. When we're just detecting and responding, we may miss the true cause of the problem, which leaves us vulnerable to the same issues happening again. An investigation is the only way to uncover the weak points in your defenses, learn from your mistakes, and improve over time.

The True Cost of Missing the Investigation

The cost of neglecting investigation goes beyond just missing a threat. It's about missed opportunities for learning and growth. Every attack offers a lesson. By investigating the full scope of a breach, you gain insights that not only help in responding to that incident but also prepare you to defend against future ones. It's about building resilience, not just reaction.

Think about it: If you never investigate an incident thoroughly, you're essentially ignoring the underlying risk that allowed the threat to flourish. You might fix the hole that was exploited, but you won't have a clear understanding of why it was there in the first place. And next time, attackers might find a different way in.

The Bigger Picture: Cybersecurity as a Continuous Learning Process

Here's the deeper point: Cybersecurity is not about preventing every single attack; that's an unrealistic goal. It's about understanding your vulnerabilities, adapting, and getting better over time. Investigation is a tool for continuous improvement.

The market has been laser-focused on detection and response, and for good reason. These are crucial in mitigating immediate risk. But they should be part of a broader, more reflective process that includes investigation, a phase that allows you to learn from the past and prepare for the future. In the long run, this is the real key to building a resilient security posture.

Final Thoughts: A Shift in Thinking

As we look to the future of cybersecurity, it's time for a shift in thinking. Instead of just reacting to threats, let's focus on understanding them: investigating the root causes, uncovering patterns, and using those insights to strengthen our defenses. The goal should be not just to stop the attack, but to learn from it and build a better system going forward.

If we can embrace this mindset, we'll be far more prepared for the challenges ahead. After all, the best defense against tomorrow's attack isn't just detecting it when it happens. It's understanding it before it even starts.

Learn how NETSCOUT Omnis Cyber Intelligence can help by providing comprehensive network visibility with scalable deep packet inspection (DPI) to detect, investigate, and respond to threats more efficiently.