What is ITDR? A Practical Guide to Identity Threat Detection and Response

Introduction: Identity is the New Attack Surface

Identity has become the primary entry point for attackers. As organizations continue to adopt cloud services and remote work, users now access resources beyond traditional network boundaries.

As a result, attackers increasingly log in using compromised credentials instead of exploiting vulnerabilities.

While MFA improves security, it does not fully prevent attacks. In fact, techniques like phishing proxies, token theft, and session hijacking continue to bypass authentication controls.

Because of this, organizations need visibility beyond login events. This is where ITDR (Identity Threat Detection and Response) becomes critical. ITDR focuses on detecting suspicious identity activity and enabling timely responses after authentication.

In this context, Hexnode supports this approach by adding device compliance and endpoint-level visibility to identity workflows. As a result, security teams can investigate identity-linked activity and take response actions with a better context.

What is ITDR?

ITDR (Identity Threat Detection and Response) is a security approach focused on detecting, investigating, and responding to threats that target identities.

Unlike traditional identity systems, ITDR does not stop at authentication. Instead, it monitors how identities behave after access is granted.

This distinction is important. A login may appear valid, yet the activity that follows can still be malicious.

ITDR helps security teams identify:

• Credential misuse, even after successful login
• Privilege escalation attempts within a system
• Unusual identity behavior, such as unexpected process execution
• Session abuse, including token misuse

In practice, ITDR works by combining multiple signals:

• Identity data from authentication systems
• Device context, such as compliance status
• Endpoint activity, including processes and scripts

As a result, ITDR provides a more complete view of identity risk.

Hexnode contributes to this model by supplying endpoint-level visibility and device context. This allows administrators to investigate identity-linked activity and take response actions when necessary.

In simple terms:

• IAM verifies identity
• ITDR validates how that identity is used

Why is ITDR Critical Today?

Identity attacks have evolved. As a result, organizations can no longer rely on authentication controls alone.

ITDR addresses gaps that traditional identity security does not cover.

Identity Has Replaced the Perimeter

Users now work from multiple locations and devices. Therefore, network boundaries no longer define security.

Attackers take advantage of this shift. They target identities because access is no longer tied to a fixed environment.

As a result, security must evaluate both the user and the device continuously.

MFA Does Not Stop All Attacks

MFA adds an important layer. However, attackers have adapted.

They now use:

• Phishing proxies to capture session tokens
• Adversary-in-the-middle attacks
• Social engineering to bypass verification

Therefore, even authenticated sessions can be misused.

ITDR helps detect these scenarios by analyzing behavior after logging in.

IAM Lacks Post-Authentication Visibility

IAM systems enforce access policies. However, they do not monitor what happens after access is granted.

This creates blind spots such as:

• Suspicious process execution
• Unauthorized privilege changes
• Abnormal system activity

ITDR fills this gap by focusing on post-login behavior and context.

Compliance Requires Continuous Monitoring

Modern compliance standards require more than access control.

Organizations must demonstrate:

• Continuous visibility
• Threat detection capabilities
• Incident response readiness

ITDR supports these requirements by enabling monitoring and investigation across identity activity.

Challenges in Identity Security

Identity security remains difficult despite strong IAM controls. This is because modern environments introduce fragmentation and limited visibility.

• Identity Sprawl
  Organizations manage identities across cloud, SaaS, and on-prem systems. As a result, visibility is inconsistent and harder to maintain.
• Dormant Accounts
  Unused accounts often remain active with permissions intact. Therefore, attackers can exploit them without immediate detection.
• Lack of Device Context
  Valid login does not always mean safe access. For example, a compromised account may be used from an unmanaged device.
• Limited Post-Login Visibility
  IAM systems focus on access, not behavior. As a result, suspicious activity after logging in often goes unnoticed.

ITDR helps detect these risks by analyzing identity behavior beyond authentication.

Identity-based attacks are rapidly increasing, with credential theft rising by 160% in 2025 and 1.8 billion credentials stolen in just the first half of the year.

How does ITDR Work in Practice?

ITDR combines identity signals with a device and endpoint context to detect and respond to threats after authentication.

1. Signal Collection – Data is gathered from identity systems, device compliance, and endpoint activity.
2. Detection – ITDR identifies anomalies such as unusual logins or suspicious process execution.
3. Investigation – Admins analyze activity using event logs, process trees, and osquery in Hexnode.
4. Response – Threats are contained through actions like device isolation, process termination, and access restriction.

This workflow helps security teams detect and respond to identity misuse with better context.

Where Hexnode Fits

Hexnode strengthens ITDR by adding endpoint and device context to identity security.

It helps organizations:

• Validate device compliance before access
• Monitor endpoint activity linked to identity usage
• Investigate suspicious behavior using system-level data

As a result, IT teams gain better visibility into how identities are used in real environments.

How Hexnode Enables ITDR

Hexnode enables ITDR by combining Unified Endpoint Management (UEM), Hexnode XDR, and Hexnode Identity Provider (IDP) capabilities. Together, these components add device context, endpoint visibility, and access control to identity security.

Device Trust with Hexnode UEM

Hexnode UEM establishes device trust before identity access is granted.

Using device compliance policies, organizations can ensure that only secure devices are allowed to access corporate resources.

Key capabilities include:

• Enforcing disk encryption, passcode, and OS update policies
• Monitoring real-time compliance status
• Restricting access based on device posture

For example:

• A device without encryption can be marked non-compliant
• Access can then be restricted using identity controls

This approach ensures that identity validation includes device health as a prerequisite.

Endpoint Detection with Hexnode XDR

Hexnode XDR provides endpoint-level visibility that is essential for ITDR.

It helps detect identity-linked threats by monitoring:

• Process execution
• Script activity such as PowerShell
• Suspicious behavioral patterns

These signals are critical when credentials are valid, but behavior is not.

Investigation Using Process Trees and Osquery

Hexnode supports investigation through built-in tools that provide system-level context.

Admins can use:

• Process Trees to trace how an attack started and propagated
• Historical Events to review past device and user activity
• Osquery to run live queries on endpoints

For example, teams can:

• Identify unauthorized local user creation
• Audit privilege changes
• Verify system state during an incident

Response Actions with Hexnode XDR

Once a threat is confirmed, Hexnode enables direct response from the console.

Supported actions include:

• Device Isolation to block network access
• Process Termination to stop malicious execution
• Malicious File Deletion to remove payloads

These actions help contain identity-based attacks before they spread.

Identity Control with Hexnode IDP

Hexnode IDP adds an identity and access layer that integrates with endpoint management.

It supports:

• Role-Based Access Control (RBAC)
• Multi-Factor Authentication (MFA)
• Conditional access based on device compliance
• Integration with Microsoft Entra ID

This allows organizations to enforce:

• Access only from managed and compliant devices
• Authentication policies tied to device posture

Featured resource

Hexnode IdP Solution Brief

See Hexnode IdP’s ability to unify identity and device posture through SSO, MFA, and Zero Trust.

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Bringing It All Together

Hexnode enables ITDR by connecting:

• Identity signals from Hexnode IDP or external providers
• Device compliance from Hexnode UEM
• Endpoint activity from Hexnode XDR

As a result, security teams can:

• Detect identity misuse using endpoint telemetry
• Investigate incidents with system-level visibility
• Respond using device-level controls

This layered approach strengthens identity security without replacing existing infrastructure.

Use Case: Detecting Session Hijacking

Session hijacking is a common method used to bypass authentication.

Scenario: An attacker obtains a valid session token through phishing.

Behavior: The attacker attempts to access a different device using the stolen session.

Detection:

• The device appears unmanaged or non-compliant
• Endpoint activity does not match normal usage
• Hexnode surfaces these signals for investigation.

Response: Admins can:

• Restrict access through the identity provider
• Isolate the device
• Investigate endpoint activity
• Reset credentials

This helps limit the impact of the attack.

Best Practices for ITDR

To strengthen ITDR:

• Apply the principle of least privilege
• Audit dormant and orphaned accounts
• Combine identity and device signals
• Monitor activity continuously

These practices improve detection and support faster response.

Conclusion: Building Identity Security with Context

Identity threats are evolving. Attackers now rely on valid credentials and session abuse rather than traditional exploits.

Therefore, organizations must extend security beyond authentication.

ITDR provides this capability by focusing on detection and response after access is granted.

Hexnode supports ITDR by adding:

• Device compliance
• Endpoint visibility
• Response actions

As a result, organizations gain better control over identity risk while continuing to use their existing identity systems.