What Is XDR Threat Hunting?

To understand why XDRs are so powerful, it’s helpful to explain how they differ from the other main threat hunting tools on the market. These are commonly used by security operations teams to help detect and prevent a wide range of stealthy attacks and missed threats.

When it comes to threat hunting, there are a lot of acronyms to get your head around. Here are some of the most important:

1. SIEM – Security information and events management (SIEM) platforms are designed to analyze and monitor activity within an IT environment. They generally do this by monitoring user behavior via log files. The most up-to-date tools will use anomaly analysis to detect suspicious behavior. Unlike XDR, a SIEM doesn’t generally analyze telemetry data, endpoint data, or network traffic – making this a more limited solution overall.
2. SOAR – Security orchestration, automation, and response (SOAR) tools are designed to work alongside SIEM platforms. In this context, the SIEM will identify relevant alerts before sending them to the SOAR to determine the response. SOARs let security teams define automated responses based on particular triggers, which help enable a quicker and more effective response. A failed user login, for example, could trigger a response to complete multi-factor authentication. SOARs also help lock down potential threats until you have time to conduct further investigation.
3. EDR – Endpoint detection and response (EDR) tools are another predecessor of XDRs. They are much narrower in focus, since they specifically detect hidden threats at the endpoint level. This means they don’t have visibility over eg, network threats, telemetry data, log data, and other threat signals. EDR products are increasingly redundant nowadays, since their functionality is often rolled into wider XDR platforms.
4. XDR – XDR products are an evolution of the other tools on this list. They aim to combine functionality from as many different siloed threat hunting solutions as possible to create a single centralized platform.
5. MXDR – Security providers generally offer managed services as a separate add-on or module. When combined with an XDR, this is referred to as ‘managed XDR’ or MXDR. Generally, this includes 24/7 remote monitoring, automated patch management, and advanced threat intelligence.

As you can probably tell, there’s significant crossover between each of these products. That’s because newer innovations in the market (principally XDR) tend to replicate and expand on the functionality of their predecessors.

Consolidation Is Key: How XDRs Make Your Security Posture Stronger

If there’s one crucial element that makes XDR products unique, it’s this: Consolidation.

The best XDR products on the market aim to combine functionality available through SIEMs, SOARs, or EDRs. Some XDR products (like Heimdal®) even take the concept of XDR to the next level; creating a single consolidated platform for all your cybersecurity needs. (See below for more details.)

It’s no coincidence that these tools have developed in the last few years. According to Gartner, 75% of organizations are now pursuing security vendor consolidation.

On the surface, this might just seem like a case of organizations looking to reduce costs and confusion. That’s certainly a contributing factor, but it’s not the main cause. In fact, the chief goal is better cybersecurity.

According to the same Gartner study, 65% of organizations surveyed said they planned to ‘improve their risk posture’, compared with 29% of respondents who expected to reduce spending on licenses.

Perhaps most importantly, 57% of organizations resolved security threats faster after implementing an XDR strategy.

So how does a consolidated threat hunting tool improve your overall security posture and detect stealthy attacks? Let’s take a look at an example to understand this in more detail:

Creating a 360° Risk Profile

Let’s imagine you receive a potential threat alert saying the sales manager has just logged in from a new location. On its own, this isn’t a huge cause for concern. But if the manager’s device is also infected with malware and has unpatched vulnerabilities, the risk profile starts to look more critical.

Let’s take it to the next level: What if you knew that a series of similar attacks had been detected from other companies in recent weeks – all of which had the same behavioral signs?

Now, the risk starts to look critical. At this point, it’s probably time to lock down the account – especially since the sales manager has access to sensitive customer data.

There’s no single telltale sign that betrays the hacker here. Instead, a combination of different risk signals combine together to give a holistic view of the relative risk. But with the traditional security approach, each individual risk signal will be picked up by a different dashboard:

• Suspicious login attempts – Generally picked up by SIEM products
• Unpatched vulnerabilities and malware – Are the domain of endpoint detection tools
• Telemetry data – Not generally available through traditional SIEM or EDR products

Unless you use cumbersome integrations to connect these tools, there’s no way to gain a holistic picture of the full risk profile. You also run the risk of a confused and contradictory response if your EDR and SIEM both respond to the same attack in different ways.

This is the main reason that XDRs evolved and why organizations are looking to combine security products as much as possible. Done right, an XDR can consolidate these signals into a single dashboard, so you can get a full picture of risk.

This helps enable a much more effective, efficient, and targeted response – while removing unnecessary friction for end users.

6 Core Features of XDR Tools

Now we’ve defined XDR, it’s helpful to understand the main features and how they can be best used by threat hunters to monitor and detect complex threats.

One key caveat: There’s a lot of variation in the features offered by different XDR tools. The features below are common across most conventional products, but some platforms (like Heimdal®) are much wider than others.

1. Centralized data dashboard – This is the bedrock of an effective XDR product. Here, you can compile, view, and compare insights about network threats, log data, endpoint threats, telemetry data, and much more.
2. Automated incident response – Most XDR products also include automation tools traditionally found in SOARs. This gives you the flexibility to define responses for specific risk signals, such as requiring extra authentication when users log in from a new device or location.
3. Reporting and visualization – XDR tools can collate and export data on patches, access requirements, sensitive data, and more. This helps organizations adhere to their increasingly stringent compliance requirements.
4. Behavioral analysis – XDRs also replicate behavioral analysis tools from traditional SIEMs, including log file analysis. This helps detect suspicious activity within the IT environment, including new device logins, lateral movement, and more.
5. Telemetry data – Telemetry data is the combined realtime intelligence of all IT environments monitored by a particular cybersecurity product. If, for instance, we detect a threat in one Heimdal® client’s IT environment, we can use those advanced analytics to proactively protect every other client.
6. Endpoint threats – Most XDR products also feature a range of tools to detect threats on end-user devices like laptops, mobile devices, smart devices, and more. This essentially replicates the functionality of EDR products, allowing organizations to detect and eliminate issues like malware, ransomware, and unpatched vulnerabilities.

Not All XDRs Are Built the Same

The whole idea behind XDR products is to consolidate different tools into a unified dashboard. But as we’ve explained, some products take that logic further than others.