I’m often asked how long it takes to deploy Microsoft Purview. The answer depends on the specifics of the organization and what they want to achieve. Microsoft Purview should enable a comprehensive data governance program but it can provide risk mitigation for generative AI in the short term while the program is underway.

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Organizations need AI solutions to add value for their customers and to stay competitive. They can’t wait for years to secure and govern these systems.

For the organizations deploying generative AI, “how long does it take to deploy Microsoft Purview?” isn’t the right question.

The risk mitigation Microsoft Purview provides for AI can begin on day one. This includes Microsoft AI, like Microsoft 365 Copilot, AI that an organization builds in-house, and AI from third parties like Google Gemini or ChatGPT.

This post will discuss ways we can secure and govern data used or generated by AI quickly, with minimal user impact, change management, and resources required.

These Microsoft Purview solutions are:

• Microsoft Purview Data Security Posture Management for AI
• Microsoft Purview Information Protection
• Microsoft Purview Data Loss Prevention
• Microsoft Purview Communications Compliance
• Microsoft Purview Insider Risk Management
• Microsoft Purview Data Lifecycle Management
• Microsoft Purview Audit and Microsoft Purview eDiscovery
• Microsoft Purview Compliance Manager

Here are short term steps you can take while the comprehensive data governance program is underway.

Microsoft Purview Data Security Posture Management for AI

Microsoft Purview Data Security Posture Management for AI (DSPM for AI) provides visibility into data security risks. It reports on:

• User’s interactions with AI.
• Sensitive information in the prompts users share with the AI.
• Whether the sensitive information users share is labeled and thus is protected by durable security policy controls.
• Whether and how user interactions may be violating company policy including codes of conduct and attempts at jailbreak, where users manipulate the system to circumvent protections.
• The risk level of users interacting with the system, such as inadvertent or malicious activities they may be involved in that put the organization at risk.

DSPM for AI reports on this for each AI application and can drill down from the reports to the individual user activities. DSPM for AI collects and surfaces insights from the other Microsoft Purview solutions around generative AI risks in a single screen.

Custom sensitive information types, sensitivity labels, and information protection rules are reasoned over by DSPM for AI, but if these are not available, more than 300 out-of-the-box sensitive information types are available from day one.  

DSPM for AI will use these to report on risk for the organization without additional configuration. The organization’s administrators can configure policy to mitigate these risks directly from the DSPM for AI tool.

Figure 1. DSPM for AI shows interactions with Microsoft 365 Copilot, enterprise generative AI from other providers, and AI developed in-house.

Figure 2. DSPM for AI Reports on generative AI user interactions with sensitive data.

A big concern that organizations have in widely deploying generative AI is that it will return results that contain sensitive information that the user should not have access to. SharePoint sites have been created over the years, are unlabeled, and may be accessible to the entire organization through the AI. The “security by obscurity” that may have prevented the sensitive information from being inappropriately shared is now negated by the AI that reasons over and returns the data.

Data assessments, part of DSPM for AI, and currently in preview, identifies potential oversharing risks and allows the administrator to apply a sensitivity label to the SharePoint sites, the sensitive data, or initiate an Microsoft Entra ID user access review to manage group memberships.

The administrator can engage the business stakeholder who has knowledge of the risk posed by the data and invite them to mitigate the risk or apply the policy at scale from the Microsoft Purview administration portal.

Figure 3. Data assessment—visualize risk, review access, and deploy policy.

Microsoft Purview Information Protection

The document access controls of Microsoft Purview Information Protection, including sensitivity labels, are enforced when the data is reasoned over by AI. The user is given visibility in context that they are working with sensitive information. This awareness empowers users to protect the organization. 

The sensitivity labels that enforce scoped encryption, watermarking, and other protections travel with the document as the user interacts with the AI. When the AI creates new content based on the document, the new content inherits the most restrictive label and policy.

Microsoft Purview can automatically apply sensitivity labels to AI interactions based on the organization’s existing policy for email, desktop applications, and Microsoft Teams, or new policy can be deployed for the AI.

These can be based on out-of-the-box sensitive information types for a quick start.

Microsoft Purview Data Loss Prevention

The Microsoft Purview Data Loss Prevention policies that the organization currently uses for email, desktop applications, and Teams can be extended to the AI or new policy for the AI can be created. Cut and paste of sensitive information or transfer of a labeled document into the AI can be prevented or only allowed with an auditable justification from the user.

A rule can be configured to prevent all documents bearing a specific label from being reasoned over by the AI. Out-of-the-box sensitive information types can be used for a quick start.

Microsoft Purview Communication Compliance

Microsoft Purview Communication Compliance provides the ability to detect regulatory compliance (for example, SEC or FINRA) and business conduct violations such as sensitive or confidential information, harassing or threatening language, and sharing of adult content.

Out-of-the-box policies can be used to monitor user prompts or AI-generated content. It provides policy enforcement in near real time and also audit logs and reporting.

Microsoft Purview Insider Risk Management

Microsoft Purview Insider Risk Management correlates signal to identify potential malicious or accidental behaviors from legitimate users. Pre-configured generative AI-specific risk detections and policy templates are now available in preview.

As the Insider Risk Management solution algorithms determine a user to be engaging in risky behavior, the data loss prevention (DLP) policies for that user can be made stricter using a feature called Adaptive Protection. It can be configured with out-of-the-box policies. This continuous monitoring and policy modulation mitigates risk while reducing administrator workload.

AI analytics can be activated from the Microsoft Purview portal to provide insights even before the Insider Risk Management solution is deployed to users. This quickly surfaces AI risks with minimal administrative workload.

Microsoft Purview Data Lifecycle Management

Microsoft Purview can enforce AI Data Lifecycle Management, with retention of AI prompts, prompt returns, and the documents AI creates for a specified time period. This can be done globally for every interaction with an AI solution. It can be done with out-of-the-box or custom policies. This will keep these interactions available for future investigations, for regulatory compliance, or to tune policies and inform the governance program.

A policy for deletion of AI interactions can be enforced so information is not over-retained.

Microsoft Purview Audit and Microsoft Purview eDiscovery

The organization will need to support internal investigations around the use of AI. Microsoft Purview Audit logs and retains these interactions. They also need to support their legal team should they have to produce AI interactions to support litigation.

Microsoft Purview eDiscovery can put a user’s interactions with the AI as well as their other Microsoft 365 documents and communications on hold so that their availability to support investigations is maintained. It allows them to be searched based metadata, enhancing relevancy, annotated, and produced.

Microsoft Purview Compliance Manager

Microsoft Purview Compliance Manager has pre-built assessments for AI regulations including:

• EU Artificial Intelligence Act.
• ISO/IEC 23894:2023.
• ISO/IEC 42001:2023.
• NIST AI Risk Management Framework (RMF) 1.0.

These assessments are available to benchmark compliance over time, report on control status, and maintain and produce evidence for both Microsoft and the organization’s activities that support the regulatory compliance program.

Microsoft Purview is an AI enabler

Without security, governance, and compliance bases being covered, the AI program puts the organization at risk. An AI program can be blocked before it deploys if the team can’t demonstrate how it is mitigating these risks.

The actions suggested here can all be taken quickly, and with limited effort, to set up a generative AI deployment for success.

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Learn more about Microsoft Purview.

To learn more about Microsoft Security solutions, visit our website. Bookmark the Security blog to keep up with our expert coverage on security matters. Also, follow us on LinkedIn (Microsoft Security) and Twitter (@MSFTSecurity) for the latest news and updates on cybersecurity.

The post Fast-track generative AI security with Microsoft Purview appeared first on Microsoft Security Blog.

Historically, organizations have relied on the traditional approach to data security and governance, largely involving stitching together fragmented solutions. According to Gartner®, “75% of security leaders are actively pursuing a security vendor consolidation strategy as of 2022.”² Consolidation, however, is no easy feat. In a recent study, more than 95% of security leaders acknowledge that unifying the handling of data security, compliance, and privacy across teams and tools is both a priority and a challenge.³ These approaches often fall short because of duplicate data, redundant alerts, and siloed investigations, ultimately leading to increased data risks. Over time, this approach has been increasingly difficult for organizations to maintain.

Unify how you protect and govern your data with Microsoft Purview

Unlike traditional data security and governance strategies that require disparate solutions to achieve comprehensive data protection, Microsoft Purview is purpose-built to unify data security, governance, and compliance into a single platform experience. This integration aims to reduce complexity, simplify management, and mitigate risk, while helping enhance efficiency across teams to support a culture of collaboration. With Microsoft Purview you can:

• Enable comprehensive data protection.
• Support compliance and regulatory requirements.
• Help safeguard AI Innovation.

What’s new in Microsoft Purview?

To meet our growing customer needs, the team has been delivering a lot of innovation at a rapid pace. In this blog, we’re excited to recap all the new capabilities we announced at Microsoft Ignite last month.

Enable comprehensive data protection

Microsoft Purview enables you to discover, secure, and govern data across Microsoft and third-party sources. Today, Microsoft Purview delivers rich data security capabilities through Microsoft Purview Data Loss Prevention, Microsoft Purview Information Protection, and Microsoft Purview Insider Risk Management, enhanced with AI-powered Adaptive Protection. To drive AI transformation, you need to build and maintain a strong data foundation, categorized by data that is not just secured but also governed. Microsoft Purview also addresses your data governance needs with the newly reimagined Microsoft Purview Unified Catalog. These data security and data governance products leverage shared capabilities such as a common data catalog, connectors, classifications, and audit logs—helping reduce inconsistencies, inefficiencies, and exposure gaps, commonly experienced by using disparate tools.

Introducing Microsoft Purview Data Security Posture Management

Microsoft Purview Data Security Posture Management (DSPM) provides visibility into data security risks and recommends controls to protect that data. DSPM provides contextual insights, usage analysis, and continuous risk assessments of your data, helping you mitigate risks and enhance data security. With DSPM, you get a shared understanding of key risks through a series of reports that correlate insights across location and type of sensitive data, risky user activities, and common exfiltration channels. In addition, DSPM provides actionable, scenario-based recommendations for detection and protection policies. For example, DSPM can help you create an Insider Risk Management policy that identifies risky behavior such as downgrading labels in documents followed by exfiltration, and a data loss prevention (DLP) policy to block that exfiltration at the same time.

DSPM also brings a view of historical trends and insights based on sensitivity labels applied, sensitive assets covered by at least one DLP policy, and potentially risky users so show the effectiveness of your data security policies over time. And finally, DSPM leverages the power of generative AI through its deep integration with Microsoft Security Copilot. With this integration, you can easily uncover risks that might not be immediately apparent and drive efficient and richer investigations—all in natural language.

With DSPM, you can easily identify possible labeling and policy gaps such as unlabeled content and users that aren’t scoped in a DLP policy, unusual patterns and activities that might indicate potential risks, as well as opportunities to adapt and strengthen your data security program.

Figure 1. DSPM overview page provides centralized visibility across data, users, and activities, as well as access to reports.

Learn more about this announcement in the Data Security Posture Management blog.

Increasing data security and security operations center integration

Understanding data and user context is vital for improving security operations and prioritizing investigations, especially when sensitive data is at stake. By integrating insights such as data classification, access controls, and user activity into the security operations center (SOC) experience, organizations can better assess the impact of security incidents, reduce false alerts, and enhance containment efforts. In addition to the already present DLP alerts in the Microsoft Defender XDR incident investigation and data security remediation actions enabled directly from Defender XDR, we’ve also added Insider Risk Management context to the user entity page to provide a more comprehensive view of user activities.

With Microsoft Purview’s latest integration with Microsoft Defender, now in preview, you get insider risk alerts in Defender XDR and can correlate them with incidents. This gives you critical user context for your security investigations. SOC teams can now better distinguish internal incidents from external cyberattacks and refine their response strategies. For more complex analysis to identify risks such as attack patterns, we are integrating insider risk signals into Defender XDR’s Advanced Hunting, giving you deeper insights and allowing you to improve your policies in partnership with data security teams. Together, these advancements allow your organization to stay ahead of evolving cyberthreats, providing a collaborative and data-driven approach to security.

Learn more about this announcement in the Purview Insider Risk Management blog.

Protecting data and preventing sensitive data loss

As AI generates new data in unprecedented volumes, the need to secure that data and prevent the loss of sensitive information has become even more crucial. Our new DLP capabilities help you effectively investigate DLP incidents, fortify existing protections, and refine your overall DLP program. You can now customize Purview DLP to the established processes of your organization with the Microsoft Power Automate connector in preview. This lets you automate and customize your DLP policy actions through Power Automate workflows to integrate your DLP incidents into new or established IT, security, and business operations workflows, like stakeholder awareness or incident remediation.

DLP policy insights in Security Copilot, also in preview, summarize existing DLP policies in natural language and helps you understand any gaps in policy coverage across your environment. This makes it easier for you to quickly and easily understand the full breadth of DLP policy coverage across your organization and address gaps in protection. We are also enhancing DLP protections on endpoints by expanding our file type coverage from more than 40 to more than 110 file types. Users can also now store and view full files on Windows devices as evidence for forensic investigations using Microsoft-managed storage. With the Microsoft-managed option, your admins can save time otherwise spent configuring additional settings, assigning permissions, and selecting the storage in the policy workflow. Finally, you can now enforce blanket protections on file types that cannot currently be scanned or classified by endpoint DLP, such as blocking copy to removable media for all computer-aided design (CAD) files regardless of those files’ contents. This helps ensure that the diverse range of file types found in your environment are still protected even if they cannot currently be scanned and classified by Microsoft Purview endpoint DLP. 

Learn more about these announcements in our Microsoft Purview Data Loss Prevention blog.

Microsoft Purview Data Governance innovations to drive greater business value

Research indicates that data practitioners spend 80% of their time finding, cleaning, and organizing data, leaving only 20% of time to process and analyze it.⁴ To simplify the data governance practice in the age of AI, the Microsoft Purview Unified Catalog is a comprehensive enterprise catalog that automatically inventories and tags your organization’s critical data assets. This gives your business users the ability to search for specific business data when building analytics reports or AI models. The Unified Catalog gives you visibility and confidence in your data across your disparate data sources and local catalogs with built-in data quality management and end-to-end lineage. You can integrate metadata from diverse catalogs such as Fabric OneLake, Databricks Unity, and Snowflake Polaris, into a unified catalog for all your data stewards, data owners, and business users.

Now in preview, Unified Catalog provides deeper data quality through a new scan engine that supports open standard file and table formats for big data platforms, including Microsoft Fabric, Databricks Unity Catalog, Snowflake, Google Big Query, and Amazon S3. This new scan engine enables rich data quality management at the asset level for improved data quality management at the asset level for overall improved data quality health. Lastly, Microsoft Purview Analytics in OneLake (preview) allows you to extract tenant-specific metadata from the Unified Catalog and export it directly into OneLake. You can then use Microsoft Power BI to analyze the metadata to further understand and report on your data’s quality and lineage.

Learn more about these announcements in our Microsoft Purview Data Governance blog.

Support compliance and regulatory requirements

As regulatory requirements evolve with the proliferation of AI, it is more critical than ever for businesses to keep compliance and privacy top of mind. However, adhering to requirements is becoming increasingly complex, while consequences for non-compliance are growing more severe. Microsoft Purview empowers you to address regulatory demands and comply with corporate policies by offering compliance and privacy controls that are both scalable and adaptable to changing needs.

New templates in Compliance Manager to help simplify compliance

Microsoft Purview Compliance Manager provides insights into your organization’s compliance status through compliance templates and provides suggested actions and next steps to help you along your compliance journey. Compliance Manager continues to add new templates to help you address new and evolving regulations, including templates for the European Union AI Act (EUAI Act), NIST 2 AI, ISO 42001, ISO 23894, Digital Operations Resiliency Act (DORA), and additional industry and regional regulations. Compliance Manager now includes historical records that help track your organization’s compliance and provides actionable next steps to understand how new regulations or policies affect your compliance score over time. In addition, you can now leverage custom templates to address both regulatory and your organization’s specific policies and preferences.

Figure 2. EUAI Act Assessment in Compliance Manager.

Learn more about this announcement in the Microsoft Purview Compliance Manager blog.

New Microsoft Purview controls for ChatGPT Enterprise with integration with OpenAI for improved compliance

Microsoft Purview now integrates with ChatGPT Enterprise, allowing you to gain visibility and govern the prompts and responses of your ChatGPT Enterprise interactions. This integration, currently in preview, includes Microsoft Purview Audit for auditing ChatGPT Enterprise interactions, Microsoft Purview Data Lifecycle Management for enabling retention and deletion policies, Microsoft Purview Communication Compliance to proactively detect regulatory and corporate policy violations, and Microsoft Purview eDiscovery to streamline legal investigations.

Learn more about all these announcements in our Security for AI blog.   

Microsoft Purview is built to help safeguard AI Innovation

With the rapid adoption of AI, new vulnerabilities have emerged, highlighting the need for strong data security and governance of AI workloads. Microsoft Purview is built to secure and govern data related to pre-built and custom-built AI apps.

Introducing Microsoft Data Security Posture Management for AI (DSPM for AI)

Security teams often find themselves in the dark when it comes to data security and compliance risks associated with AI usage. Without proper visibility, organizations often struggle to safeguard their AI assets effectively. DSPM for AI, now generally available, gives you visibility through a centralized dashboard and reports, enables you to proactively discover and manage your AI-related data risks, such as sensitive data in user prompts, and gives you actionable recommendations and real-time insights to respond effectively to security incidents.

Microsoft Purview controls for Microsoft 365 Copilot help prevent data oversharing

Data oversharing occurs when users have access to more data than necessary for their job duties. Organizations need effective data security controls to help mitigate this risk. At Microsoft Ignite we announced a number of new Microsoft Purview capabilities in preview to prevent data oversharing in Microsoft 365 Copilot.

Data oversharing assessments: Discover data that is at risk of oversharing by scanning files containing sensitive data, identifying risky data sources such as SharePoint sites with overly permissive user access, and by providing recommendations such as auto-labeling policies and default labels to prevent sensitive data from being overshared. The oversharing assessment report can identify unlabeled files accessed by users before deploying Copilot or can be run post-deployment to identify sensitive data referenced in Copilot responses. 

Label-based permissions: Microsoft 365 Copilot honors permissions based on sensitivity labels assigned by Microsoft Purview when referencing sensitive documents.

Purview DLP for Microsoft 365 Copilot: You can create DLP policies to exclude documents with specified sensitivity labels from being processed, summarized, or used in responses in Microsoft 365 Copilot, preventing sensitive data from being inadvertently overshared.

New Microsoft Purview capabilities to detect risky activities in Microsoft 365 Copilot

Security teams need ways to detect risky use of AI applications like deliberate or accidental access to sensitive data, jailbreaks, and copyright violations. Insider Risk Management and Communication Compliance now provide risky AI usage indicators, a policy template, and an analytics report in preview to help detect and investigate the risky use of AI. These new capabilities not only help detect risky activities and prompts but also integrate with Microsoft Defender XDR, enabling your security teams to investigate new AI-related risks holistically alongside other risks, such as identity risks through Microsoft Entra and data oversharing and data loss risks through Purview DLP.

New Microsoft Purview capabilities for agents built with Microsoft Copilot Studio

When new and citizen developers are building low code or no-code AI, they often lack security expertise and tools to enable security and compliance controls. Microsoft Purview now provides data controls for agents built in Copilot Studio to enable low code and no-code developers to build more secure agents. For example, when an agent built with Copilot Studio accesses sensitive data, it will recognize and honor the sensitivity labels of the data being accessed. Microsoft Purview will also protect sensitive data generated by the agent through label inheritance and will enforce label permissions, ensuring only authorized users have access.

Data security admins also get visibility into the sensitivity of data in user prompts and agent responses within DSPM for AI. Moreover, Microsoft Purview will enable you to detect anomalous user activity and risky or non-compliant AI use and apply retention or deletion policies on your agent prompts and responses. These new controls give you visibility and and insights into risks for your agents built with Copilot Studio, strengthening your data security posture.

Learn more about all these announcements in our Security for AI blog.   

Unified solutions that empower your organization

As you navigate the complexities of AI proliferation, regulatory requirements, and security threats, we are excited to innovate, invest in, and expand the capabilities of Microsoft Purview to address your most pressing data security, governance, and compliance challenges.

Get started with Microsoft Purview today

To get started, we invite you to try Microsoft Purview free and to learn more about Microsoft Purview today.

• Read the Data Security Index report.
• Read our new whitepaper: Accelerating AI transformation by prioritizing security, a path to implementing effective security for AI that enables innovation.
• Watch Microsoft Purview sessions from Microsoft Ignite.
• Try Microsoft Purview for free.

To learn more about Microsoft Security solutions, visit our website. Bookmark the Security blog to keep up with our expert coverage on security matters. Also, follow us on LinkedIn (Microsoft Security) and X (@MSFTSecurity) for the latest news and updates on cybersecurity.

¹Microsoft internal research, May 2023. 

²Gartner, Innovation Insight for Security Platforms, Peter Firstbrook, Craig Lawson. October 16, 2024. GARTNER is a registered trademark and service mark of Gartner, Inc. and/or its affiliates in the U.S. and internationally and is used herein with permission. All rights reserved. 

³Microsoft internal research, August 2024. 

⁴Overcoming the 80/20 Rule in Data Science, Pragmatic Institute.

The post New Microsoft Purview features help protect and govern your data in the era of AI appeared first on Microsoft Security Blog.

Microsoft Purview Audit

Discover new capabilities that will transform how you secure your organization's data across clouds, devices, and platforms.

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New default retention period for activity logs

Starting in October 2023, we began rolling out changes to extend default retention to 180 days from 90 for audit logs generated by Audit (Standard) customers. Audit (Premium) license holders will continue with a default of one year, and the option to extend up to 10 years. Our public roadmaps detail when retention changes will reach your organization, starting with worldwide enterprise customers and quickly followed by our government customers in accordance with our standard service rollout process. This update helps all organizations minimize risk by increasing access to historical audit log activity data that is critical when investigating the impact from a security breach incident or accommodating a litigation event.

New logs for increased security

Every day, Microsoft Purview Audit Logs record and retain the thousands of user and admin activities that take place in Microsoft 365 applications. Authorized administrators can search and access the logs from the Microsoft Purview compliance portal to determine the scope of a compromise and enhance their investigations. Audit (Standard) license holders will be able to access an additional 30 audit logs, shown in the table below over the next several months. To learn more about when the logs will be available in your tenant, please visit the Public roadmap.

Microsoft has worked closely with CISA to identify these critical logs and include them in our Microsoft Purview Audit (Standard) license. Audit (Premium) license holders will continue to get longer default retention, broader access to export data, higher bandwidth API access, and logs enriched by Microsoft’s AI-powered intelligent insights.

Additional enhancements recently released and coming soon

In addition to the retention extension and newly available logs, we also have a number of new enhancements in Purview Audit recently released or coming soon, that will help improve your experience:

• Audit Search Graph API: Programmatically access new async Audit Search experience for improved reliability and search completeness, through Microsoft Graph API. 
• Granular scoping with role-based access controls: Delegate role-based permissions to users or analysts in a granular way and access role-based information with Audit search results.  
• Audit Custom Activities Search: Admins can use the custom search bar to search for several audit log events directly. 
• Customized retention policies (short): Customers with the 10-Year Audit Log Retention add-on for Microsoft Purview Audit (Premium) can create additional customized retention policies (7 days, 30 days, three years, five years, and seven years retention). And customers with the Audit (Premium) SKU will have additional short-term retention policies available (7 days and 30 days).
• Customized retention policies (long): New long-term retention policies for the 10-Year Audit Log Retention add-on for Microsoft Purview Audit (Premium) (three years, five years, and seven years).

We are pleased to share today’s cloud logging update as a continuation of the thoughtful conversations we’ve had with our security experts, customers, and influential authorities like CISA. Please visit the Public roadmap to get the latest information on updates coming to Microsoft Purview Audit. 

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Learn more about Microsoft Purview Audit or sign up now for a free trial.

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To learn more about Microsoft Security solutions, visit our website. Bookmark the Security blog to keep up with our expert coverage on security matters. Also, follow us on LinkedIn (Microsoft Security) and X, formerly known as Twitter, (@MSFTSecurity) for the latest news and updates on cybersecurity. 

¹Expanding cloud logging to give customers deeper security visibility, Vasu Jakkal. July 19, 2023.

The post Expanding audit logging and retention within Microsoft Purview for increased security visibility appeared first on Microsoft Security Blog.

Microsoft 365 Defender is our security solution for phishing and related cyberthreats. Some great analysis has been done by the Microsoft Threat Intelligence team on BazaCall’s Tactics, Techniques, and Procedures (TTPs). They’ve also shared how to use Microsoft 365 Defender to locate exploitation activity.

I wanted to take another perspective with this post and share the role that Microsoft Purview data security solutions play, together with Microsoft 365 Defender and Microsoft Sentinel, to provide defense-in-depth mitigation. With defense-in-depth, we create barriers to the bad actor, increasing their resources required and uncertainty, interfering with their business case.

Microsoft Purview provides important value with unified data governance and compliance solutions but it’s Microsoft Purview’s data security capabilities within Microsoft 365 we’ll be discussing in this blog.

What makes BazaCall different from most phishing attacks is using a malicious email to have the victim initiate a call to a phony call center run by the bad actor that then coaches the victim to install malware. Replacing malicious links and attachments in email with a phone number to the call center is used to evade email protection.

An overview of the BazaCall attack flow is provided at the end of this post.

The mitigations suggested here will be of value for attacks where the bad actor has control of a Microsoft 365 account and is attempting to exfiltrate sensitive data.

The data security benefits of Microsoft Purview for attack mitigation are sometimes overlooked. These solutions may be managed by other groups in the organization, such as the compliance team rather than the security team, and so may not be the go-to tools in the toolbox when preparing for or responding to an attack. These solutions should be part of a defense-in-depth strategy and Zero Trust architecture.

Microsoft Purview Mitigations

Microsoft Purview Information Protection sensitivity labels can be applied to protect sensitive files from unauthorized access. These sensitivity labels can have scoped encryption, among other protections, which travels with the file inside and outside of the organization’s environment. This would make the file unreadable except by the party for which the encryption is scoped—for example, only employees, a partner, or a customer organization—or it can be defined by the user to be consumable only by specific individuals.

Figure 1. Sensitivity Label with scoped encryption—accessible only to employees.

Automation, configured by the administrators, can be used to support the user in applying these labels including making the application of a label mandatory if the file contains sensitive information.

Microsoft Purview Data Loss Prevention (Purview DLP) can be used to prevent the sensitive information from being exfiltrated through several egress channels, including user’s endpoint devices, Microsoft cloud services such as SharePoint Online, OneDrive for Business, Exchange Online, Teams, and Microsoft PowerBI, browsers such as Microsoft Edge, Chrome, and Firefox, as well as non-Microsoft applications such as Salesforce, Dropbox, Box, and more, including the free file-sharing services used as part of the BazaCall TTPs.

Customers can create policies that block and do not allow override for their top priority sensitive information such that even if the bad actor manages to get access to the user’s account, they are blocked from exfiltrating any sensitive content. Purview DLP policies can be configured leveraging a variety of out-of-the-box or custom criteria including machine learning-based trainable classifiers as well as the sensitivity labels created in Information Protection.

Figure 2. Purview DLP preventing the upload of sensitive files into Dropbox.

Microsoft Purview Insider Risk Management can alert the security team to the bad actor’s activities, including the exfiltration of sensitive information to the file-sharing service. Insider Risk Management can reason over and parse through user activity signals, by leveraging more than 100 ready-to-use indicators and machine learning models, including sequence detection and cumulative exfiltration detection. With Adaptive Protection powered by Insider Risk Management, the security team can detect high-risk actors, such as a bad actor-controlled account, and automatically enforce the strictest DLP policy to prevent them from exfiltrating data.  

Figure 3. Insider Risk Management uses specialized algorithms and machine learning to identify data exfiltration and other risks.

Microsoft Defender for Cloud Apps can make a file-sharing site used for sensitive file exfiltration unreachable from the user’s browser or it can prevent sensitive files from being moved to the site. Alternatively, the policy can be configured to only allow files to be moved to the file-sharing site if they have a sensitivity label applied that contains scoped encryption. If this protected file is exfiltrated it would not be readable by the bad actor.

Figure 4. Microsoft Defender for Cloud Apps blocking access to file sharing and backup site.

Microsoft Purview Audit provides forensic information to scope a possible breach. This is especially valuable when bad actors are “living off the land.” Among the audit items made available are the terms that a user searched in email and SharePoint. If the bad actor was searching for sensitive information to exfiltrate, this item will assist the investigation.

Purview Audit, recently expanded for accessibility and flexibility, will also provide insight to mail items accessed and mail sent, which would be impactful when investigating scope and possible exfiltration channels. Although a bad actor’s known TTPs may not include these channels, we need a fulsome investigation. Their TTPs are likely not static.

Purview Audit Premium provides more logging event retention capabilities, with one-year retention (up from 180 days with Standard) and an option to increase retention to 10 years among other upgraded features.

Figure 5. Premium Audit solution searching forensic events.

Microsoft Purview Data Lifecycle Management policies and labeling could be used to purge unneeded information from the organization’s environment. An auditable review can be required prior to deletion or deletion can be automated without user or administrator action.

If information is not in the environment, it cannot be exfiltrated by the bad actor or put the organization at risk.

Figure 6. Disposal of unneeded documents reduces exfiltration risk to the organization.

About BazaCall

BazaCall uses a phishing campaign that tricks unsuspecting users into phoning the attacker, who coaches them into downloading BazaLoader malware, which retrieves and installs a remote monitoring and management (RMM) tool onto the user’s device. The email typically claims that the user has reached the end of a free trial of some type, that billing will begin shortly and provides an option to cancel by phoning a call center. The threat of unjustified billing is the lever that the attacker uses to get the victim to comply.

Typically, the file download has been a malicious Excel document that purports to be a “cancellation form” for the unwanted service and charges referred to in the phishing campaign. The bad actor coaches the victim into accepting macros and disabling security solutions to complete the phony “cancellation.”

RMM software provides multiple useful purposes for attackers: The software allows an attacker to maintain persistence and deploy malicious tools within a compromised network. It can also be used for an interactive command-and-control system. With command and control established, the bad actor organization can spread laterally through the environment to steal sensitive data and deploy ransomware. Once command and control of the user’s machine is established, bad actor hands-on keyboard is used to exfiltrate data including through free cloud-based file-sharing sites. TTPs have evolved in the last two years, including the use of file-sharing sites for exfiltration in addition to open-source tools like RClone.

The user is also subject to human-operated ransomware.

The mitigations discussed in this post are focused on the data exfiltration aspects in the “hands-on-keyboard” phase of the attack.

Figure 7. BazaCall attack flow.

Microsoft Purview can help protect from BazaCall attacks

Microsoft Purview data security for Microsoft 365 is not a cure-all for phishing attacks. It is part of a defense-in-depth strategy that includes user training, antimalware, vulnerability management, email security, access control, monitoring, and response. The data security solutions within Microsoft Purview should be considered based on risk-based criteria for inclusion in the strategy.

These tools may be managed by different teams in the organization. Collaboration among these teams is critical for coordinated defense and incident response. 

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To learn more about Microsoft Security solutions, visit our website. Bookmark the Security blog to keep up with our expert coverage on security matters. Also, follow us on LinkedIn (Microsoft Security) and Twitter (@MSFTSecurity) for the latest news and updates on cybersecurity.

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Moving to the cloud gives organizations significant advantages in terms of performance, automatic software updates, and centralized security monitoring. Log data plays an important role in incident response because it provides granular, auditable insight into how different identities, applications, and devices access a customer’s cloud services. These logs themselves do not prevent attacks, but they can be useful in digital forensics and incident response when examining how an intrusion might have occurred, such as when an attacker is impersonating an authorized user.   

Today we are expanding Microsoft’s cloud logging accessibility and flexibility even further. Over the coming months, we will include access to wider cloud security logs for our worldwide customers at no additional cost. As these changes take effect, customers can use Microsoft Purview Audit to centrally visualize more types of cloud log data generated across their enterprise.

Microsoft Purview Audit enables customers to centrally visualize cloud log data generated across their enterprise, thus helping them effectively respond to security events, forensic investigations, internal investigations and compliance obligations. Thousands of user and admin operations performed in dozens of Microsoft 365 services and solutions are captured, recorded and retained in customers unified Purview Audit logs. 

As our expanded logging defaults roll out, Microsoft Purview Audit (Standard) customers will receive deeper visibility into security data, including detailed logs of email access and more than 30 other types of log data previously only available at the Microsoft Purview Audit (Premium) subscription level. In addition to new logging events becoming available, Microsoft is also increasing the default retention period for Audit Standard customers from 90 days to 180 days.

Commercial and government customers with E5/G5 licenses already using Microsoft Purview Audit (Premium) will continue to receive access to all available audit logging events, including intelligent insights, which help determine the scope of potential compromise by using the Audit log search in the Microsoft Purview compliance portal and the Office 365 Management Activity API. Additional Audit Premium features include longer default retention periods and automation support for importing log data into other tools for analysis.   

Today’s news comes as a result of our close partnership with CISA, which has called for the industry to take action in order to better protect itself from potential cyberattacks. It also reflects our commitment to engaging with customers, partners, and regulators to address the evolving security needs of the modern world.

Microsoft is deeply committed to building a safer world for all, and over the last years has continued to build solutions that are secure by design with built-in chip-to-cloud technology, our security development cycle, and multifactor authentication default settings. Today is another milestone in that commitment and we are grateful to work in close coordination with CISA and our customers as we continue to invest in our built-in security and other protections. 

“After working collaboratively for over a year, I am extremely pleased with Microsoft’s decision to make necessary log types available to the broader cybersecurity community at no additional cost,” said CISA Director Jen Easterly. “While we recognize this will take time to implement, this is truly a step in the right direction toward the adoption of Secure by Design principles by more companies. We will continue to work with all technology manufacturers, including Microsoft, to identify ways to further enhance visibility into their products for all customers.” 

Microsoft will begin rolling out these logging updates in September 2023 to all government and commercial customers. To access existing and new logs as they become available, visit the Microsoft Purview compliance portal and select Audit from the Solutions panel. Microsoft has historically provided security log data to customers, with options to maintain logs through Microsoft’s storage services or with other security and storage vendors, depending on preferences. Different customers have varying preferences and needs for where they save their audit logs, how they are analyzed, and how long they are retained. We know customers have multiple issues to consider, including data storage capacity and which Microsoft or third-party log management tools they want to use, and our newly expanding, flexible logging options help customers decide what is best for their requirements. 

Cybersecurity is a team sport relying on trust and transparency, which is why we are pleased to share today’s cloud logging announcement as the result of thoughtful conversations between our security experts, customers, and influential authorities like CISA. We look forward to keeping the community posted on this expanded logging rollout and sharing additional news moving forward. 

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To learn more about Microsoft Security solutions, visit our website. Bookmark the Security blog to keep up with our expert coverage on security matters. Also, follow us on LinkedIn (Microsoft Security) and Twitter (@MSFTSecurity) for the latest news and updates on cybersecurity.

The post ​​Expanding cloud logging to give customers deeper security visibility appeared first on Microsoft Security Blog.