Mobile Threat Defense

What is Mobile Threat Defense?

Mobile Threat Defense, or MTD, refers to a set of technologies designed to detect and prevent threats targeting mobile devices used by employees.

Unlike an approach focused solely on smartphone management, an MTD solution looks at the security of the device, its applications, its connections and its environment.

The goal is simple: identify behaviours or situations that present a risk and enable the company to respond before they compromise its data or systems.

Mobile Threat Defense therefore complements other components of a cybersecurity strategy, such as endpoint protection, network security, identity management and cloud security.

What threats can an MTD solution detect?

Depending on the solutions used, Mobile Threat Defense can help identify:

• malicious or potentially risky applications;
• compromised devices or devices displaying suspicious behaviour;
• connections to potentially dangerous networks;
• certain vulnerabilities or risky configurations;
• attempts to compromise an employee’s data or communications.

The value of MTD lies in monitoring the risk level of a mobile device in a professional context, rather than treating the smartphone as just another endpoint.
 

Why has mobile security become a business priority?

For a long time, corporate cybersecurity focused primarily on computers, servers and internal networks.

But the way we work has changed.

Employees work from home, travel, use cloud applications and access company resources from different networks and devices. The business smartphone has therefore become an integral part of the company’s IT environment.

Smartphones provide access to company data

A mobile device can provide access to professional email, business applications, documents or cloud platforms.
A compromised device therefore does not only put the smartphone itself at risk: it can also put the resources it provides access to at risk.

Hybrid working expands the attack surface

An employee may use their smartphone in an office, at home, in a hotel, at an airport or in a coworking space.

This mobility creates new environments and connections that the company does not always directly control.

A compromised smartphone can become a gateway to company resources

The real challenge is therefore not only to secure the device, but also to secure its access to the company’s working environment.

This is where Mobile Threat Defense comes into its own.

How does Mobile Threat Defense work?

The operation of an MTD solution can be summarised in several steps.

1. The device is analysed

The solution analyses various security-related elements of the device, its applications and its connections in order to identify potential risks.

2. A threat or anomaly is detected

When potentially risky behaviour is identified, the solution can generate an alert or determine a risk level for the device.

3. The risk level is assessed

The company can then determine whether the device meets the conditions required to access its resources.

4. Measures can be applied

Depending on the rules defined by the organisation, access to certain resources can be allowed, restricted or blocked when a device presents an excessively high level of risk.

This approach makes it possible to move from a passive protection model to a dynamic risk-control approach.

What are the benefits of Mobile Threat Defense for a company?

The main benefit of MTD is that it integrates mobile devices into a broader security strategy.

Detect threats on mobile devices

An MTD solution can help identify certain threats affecting smartphones and tablets used in a professional context more quickly.

Protect business data

By detecting risky situations, companies can reduce the likelihood of a compromised device being used to access sensitive data.

Control access to company resources

The security level of a device can be taken into account before allowing it to access certain professional resources.

Strengthen the security of mobile employees

MTD supports employees in their day-to-day activities, including when they work outside the company’s usual environments.

Centralise risk management

For IT and security teams, the goal is also to gain a more consistent view of mobile device security and apply appropriate policies.

Mobile Threat Defense and Microsoft Intune: how do they work together?

Mobile Threat Defense can be particularly valuable when integrated with the device management tools already used by a company.

Microsoft Intune, for example, enables organisations to manage devices and security policies. An MTD solution can complement this approach by providing information about the risk level of a device.

The company can then implement rules that adapt access to professional resources according to this risk level.

This creates a security chain:

Threat detection → risk assessment → access decision → remediation

This approach can help prevent a device identified as compromised from continuing to access company resources without restrictions.

What happens when a device is compromised?

Let’s take a simple example. An employee uses their smartphone to access a business application. A threat is detected on the device.

The MTD solution then identifies the risk and passes this information to the company’s security tools. Depending on the policies defined, access to certain resources can be restricted or blocked.

Once the issue has been resolved and the device’s security level has been restored, access can be re-enabled.

The goal is therefore not simply to detect a threat, but to be able to take action accordingly.

What are the use cases for Mobile Threat Defense in business?

Mobile Threat Defense is particularly relevant in environments where smartphones provide access to professional resources and are used in a variety of contexts.

When an employee works outside the company

A business smartphone may be used from a hotel, an airport, a coworking space or a public Wi-Fi network. MTD helps identify potentially risky situations and take the device’s security status into account when determining access to company resources.

When a smartphone provides access to sensitive applications

Email, business applications, cloud services or professional documents: a single device can provide access to a wide range of resources. MTD makes it possible to take the risk level of the device into account before or during this access.

In a BYOD (Bring Your Own Device) environment

When employees use their own smartphones for professional purposes, the company needs to be able to take the security of these devices into account, even though they are only partially managed by the IT department. MTD provides an additional layer of protection in this context.

When a threat is detected on a device

MTD can also come into play when a smartphone displays suspicious behaviour or is identified as compromised. Depending on the company’s policies, access to certain resources can then be restricted or blocked until the issue has been resolved

What criteria should you consider when choosing a Mobile Threat Defense solution?

Toutes les entreprises n'ont pas les mêmes besoins en matière de sécurité mobile. Avant de choisir une solution, plusieurs critères peuvent être pris en compte.

Couverture des appareils mobiles

Not all companies have the same mobile security requirements. Before choosing a solution, several criteria should be considered.

Mobile device coverage

The solution should support the mobile environments used by the company, particularly Android and iOS when both operating systems are present across the device fleet.

Integration with existing tools

Ideally, an MTD solution should integrate with the device management, identity and access management tools already deployed within the organisation.

For IT teams, the ability to monitor risks and apply security policies centrally is essential.

Threat detection and response

The quality of threat detection is obviously a key criterion, but it is also important to consider the capabilities available to respond when a risk is identified.

Ease of deployment

A mobile security solution should be deployable at scale without adding excessive complexity to IT fleet management.

How can you effectively protect your company’s mobile devices in Luxembourg?

For Luxembourg companies, mobile security should not be considered as an isolated component.

Smartphones are part of a broader environment that includes users, identities, applications, the cloud, the network and the company’s data.

An effective strategy therefore consists of integrating Mobile Threat Defense into a broader cybersecurity approach, taking into account the specific uses and risk level of each organisation.

At Proximus NXT, we help companies implement security solutions tailored to their IT environments and mobility requirements.

Would you like to strengthen the security of your company’s mobile devices? Contact our experts to discuss your environment and cybersecurity challenges.