Demystify potential data leaks with Insider Risk Management insights in Defender XDR

In today's complex security landscape, understanding and mitigating data exfiltration risks is more critical than ever. Earlier this year, we announced the integration of Insider Risk Management (IRM) insights into the Defender XDR user page, offering enhanced visibility into insider risk severity and exfiltration activities. This integration empowers SOC teams to detect and respond more effectively to insider threats, enabling them to better distinguish between external and internal attacks. 

Microsoft Purview Insider Risk Management adds significant value by identifying and mitigating potential insider risks — such as data leaks or intellectual property theft, covering key scenarios including detecting unusual employee behavior, managing data exfiltration risks from insiders performing riskier activities, and differentiating between external and internal attacks. 

Detecting the real threat: Unmasking insider data theft 

Imagine a scenario where a series of alerts are triggered for a specific user. Defender XDR detects suspicious activities such as potential data exfiltration and abnormal file access patterns, raising concerns about an external breach attempt. XDR automatically correlates these alerts into a single incident based on the user and the timeframe, allowing the SOC team to investigate the broader pattern of activities rather than individual, isolated alerts. 

By leveraging the newly integrated Insider Risk Management (IRM) insights on the XDR user page, the SOC analyst gains a deeper understanding of the user’s behavior and risk profile. Rather than focusing only on the alerts, IRM insights provides critical context, revealing patterns such as frequent downloads of sensitive documents from SharePoint or sharing confidential data via Teams. At first glance, this activity may suggest an insider threat. 

However, IRM insights also help the SOC analyst consider an alternative possibility: the user’s account may have been compromised, and an external attacker is posing as the insider to exfiltrate data. With the comprehensive user risk profile from IRM, including the user’s usual activity patterns, access history, and working behavior, the SOC can more accurately assess whether this behavior aligns with the user’s normal conduct or points to an external compromise. 

Integration with deeper context for more informed decisions 

This integration between XDR and IRM empowers the SOC team to make more informed decisions. If IRM insights indicate that the user’s behavior deviates significantly from their normal profile, the team may lean toward the theory that an external attacker is using the user’s credentials. On the other hand, if the behavior aligns with prior insider risk indicators, the incident may be treated as a case of malicious insider activity. 

With XDR correlating alerts and incidents and IRM providing deeper context, the SOC team is well-equipped to investigate the threat holistically. They can quickly escalate the incident to IRM analysts or continue their investigation in the Purview portal to analyze the full scope of the data exfiltration. This seamless integration enables faster and more accurate response, whether the threat originates from an insider or an external actor posing as one. 

Conclusion 

The IRM insights integration into the Defender XDR user page, available for XDR and IRM customers, represents a significant advancement in our mission to unify XDR capabilities with crucial data security context. This integration, building on previous efforts such as the DLP integration into XDR, enhances visibility into data exfiltration risks and equips SOC analysts with the necessary insights to effectively detect and respond to both insider threats and compromised users. 

This is an important step toward providing full data security context within XDR, with more exciting developments on the way. Learn more about IRM, and how IRM alerts, insights, and signals can transform your data security operations and bolster your IT and cloud environments' resilience against evolving threats.