Tutorial: Discover and manage shadow IT in your network
We've renamed Microsoft Cloud App Security. It's now called Microsoft Defender for Cloud Apps. In the coming weeks, we'll update the screenshots and instructions here and in related pages. For more information about the change, see this announcement. To learn more about the recent renaming of Microsoft security services, see the Microsoft Ignite Security blog.
Microsoft Defender for Cloud Apps is now part of Microsoft 365 Defender. The Microsoft 365 Defender portal allows security admins to perform their security tasks in one location. This will simplify workflows, and add the functionality of the other Microsoft 365 Defender services. Microsoft 365 Defender will be the home for monitoring and managing security across your Microsoft identities, data, devices, apps, and infrastructure. For more information about these changes, see Microsoft Defender for Cloud Apps in Microsoft 365 Defender.
When IT admins are asked how many cloud apps they think their employees use, on average they say 30 or 40, when in reality, the average is over 1,000 separate apps being used by employees in your organization. Shadow IT helps you know and identify which apps are being used and what your risk level is. 80% of employees use non-sanctioned apps that no one has reviewed, and may not be compliant with your security and compliance policies. And because your employees are able to access your resources and apps from outside your corporate network, it's no longer enough to have rules and policies on your firewalls.
In this tutorial, you'll learn how to use Cloud Discovery to discover which apps are being used, explore the risk of these apps, configure policies to identify new risky apps that are being used, and to unsanction these apps in order to block them natively using your proxy or firewall appliance
How to discover and manage Shadow IT in your network
Use this process to roll out Shadow IT Cloud Discovery in your organization.
Phase 1: Discover and identify Shadow IT
Discover Shadow IT: Identify your organization's security posture by running Cloud Discovery in your organization to see what's actually happening in your network. For more information, see Set up cloud discovery. This can be done using any of the following methods:
Get up and running quickly with Cloud Discovery by integrating with Microsoft Defender for Endpoint. This native integration enables you to immediately start collecting data on cloud traffic across your Windows 10 and Windows 11 devices, on and off your network.
For coverage on all devices connected to your network, it's important to deploy the Defender for Cloud Apps log collector on your firewalls and other proxies to collect data from your endpoints and send it to Defender for Cloud Apps for analysis.
Integrate Defender for Cloud Apps with your proxy. Defender for Cloud Apps natively integrates with some third-party proxies, including Zscaler.
Because policies are different across user groups, regions and business groups, you might want to create a dedicated Shadow IT report for each of these units. For more information, see Docker on Windows on-premises.
Now that Cloud Discovery is running on your network, look at the continuous reports that are generated and look at the Cloud Discovery dashboard to get a full picture of what apps are being used in your organization. It's a good idea to look at them by category, because you'll often find that non-sanctioned apps are being used for legitimate work-related purposes that weren't addressed by a sanctioned app.
Identify the risk levels of your apps: Use the Defender for Cloud Apps catalog to dive deeper into the risks that are involved with each discovered app. The Defender for Cloud App Catalog includes over 25,000 apps that are assessed using over 80 risk factors. The risk factors start from general information about the app (where are the app's headquarters, who is the publisher), and through security measures and controls (support for encryption at rest, provides an audit log of user activity). For more information, see Working with risk score,
In the Defender for Cloud Apps portal, under Discover, select Discovered apps. Filter the list of apps discovered in your organization by the risk factors you're concerned about. For example, you can use the Advanced filters to find all apps with a risk score lower than 8.
You can drill down into the app to understand more about its compliance by selecting the app name and then selecting the Info tab to see details about the app's security risk factors.
Phase 2: Evaluate and analyze
Evaluate compliance: Check whether the apps are certified as compliant with your organization's standards, such as HIPAA, SOC2, GDPR.
In the Defender for Cloud Apps portal, under Discover, select Discovered apps. Filter the list of apps discovered in your organization by the compliance risk factors you're concerned about. For example, use the suggested query to filter out non-compliant apps.
You can drill down into the app to understand more about its compliance by selecting the app name and then selecting the Info tab to see details about the app's compliance risk factors.
Get notified when a discovered app is associated with a recently published security breach using the built-in Discovered app security breach alert. Investigate all users, IP addresses, and devices accessing the breached app in the last 90 days, and apply relevant controls.
Analyze usage: Now that you know whether or not you want the app to be used in your organization, you want to investigate how and who is using it. If it's only used in a limited way in your organization maybe it's ok, but maybe if the use is growing you want to be notified about it so you can decide if you want to block the app.
In the Defender for Cloud Apps portal, under Discover, select Discovered apps and then drill down by selecting the specific app you want to investigate. The Use tab lets you know how many active users are using the app and how much traffic it's generating. This can already give you a good picture of what's happening with the app. Then, if you want to see who, specifically, is using the app, you can drill down further by selecting Total active users. This important step can give you pertinent information, for example, if you discover that all the users of a specific app are from the Marketing department, it's possible that there's a business need for this app, and if it's risky you should talk to them about an alternative before blocking it.
Dive even deeper when investigating use of discovered apps. View subdomains and resources to learn about specific activities, data access, and resource usage in your cloud services. For more information, see Deep dive into Discovered apps and Discover resources and custom apps.
Identify alternative apps: Use the Cloud App Catalog to identify safer apps that achieve similar business functionality as the detected risky apps, but do comply with your organization's policy. You can do this by using the advanced filters to find apps in the same category that meet with your different security controls.
Phase 3: Manage your apps
Manage cloud apps: Defender for Cloud Apps helps you with the process for managing app use in your organization. After you identified the different patterns and behaviors used in your organization, you can create new custom app tags in order to classify each app according to its business status or justification. These tags can be then used for specific monitoring purposes, for example, identify high traffic that is going to apps that are tagged as risky cloud storage apps. App tags can be managed under Cloud Discovery settings > App tags. These tags can then be used later for filtering in the Cloud Discovery pages and creating policies using them.
Manage discovered apps using Azure Active Directory (Azure AD) Gallery: Defender for Cloud Apps also uses its native integration with Azure AD to enable you to manage your discovered apps in Azure AD Gallery. For apps that already appear in the Azure AD Gallery, you can apply single sign-on and manage the app with Azure AD. To do so, on the row where the relevant app appears, choose the three dots at the end of the row, and then choose Manage app with Azure AD.
Continuous monitoring: Now that you've thoroughly investigated the apps, you might want to set policies that monitor the apps and provide control where needed.
Now it's time to create policies so you can be automatically alerted when something happens that you're concerned about. For example, you might want to create an App discovery policy that lets you know when there's a spike in downloads or traffic from an app you're concerned about. To achieve this, you should enable Anomalous behavior in discovered users policy, Cloud storage app compliance check, and New risky app. You should also set the policy to notify you by email or text message. For more information, see policy template reference, more about Cloud Discovery policies and Configure App discovery policies.
Look at the alerts page and use the Policy type filter to look at app discovery alerts. For apps that were matched by your app discovery policies, it's recommended that you do an advanced investigation to learn more about the business justification for using the app, for example, by contacting the users of the app. Then, repeat the steps in Phase 2 to evaluate the risk of the app. Then determine next steps for the application, whether you approve use of it in the future or want to block it the next time a user accesses it, in which case you should tag it as unsanctioned so it can be blocked using your firewall, proxy, or secure web gateway. For more information, see Integrate with Microsoft Defender for Endpoint, Integrate with Zscaler, Integrate with iboss, and Block apps by exporting a block script.
Phase 4: Advanced Shadow IT discovery reporting
In addition to the reporting options available in Defender for Cloud Apps, you can integrate Cloud Discovery logs into Microsoft Sentinel for further investigation and analysis. Once the data is in Microsoft Sentinel, you can view it in dashboards, run queries using Kusto query language, export queries to Microsoft Power BI, integrate with other sources, and create custom alerts. For more information, see Microsoft Sentinel integration.
Phase 5: Control sanctioned apps
To enable app control via APIs, connect apps via API for continuous monitoring.
Protect apps using Conditional Access App Control.
The nature of cloud apps means that they're updated daily and new apps appear all the time. Because of this, employees are continuously using new apps and it's important to keep tracking and reviewing and updating your policies, checking which apps your users are using, as well as their usage and behavior patterns. You can always go to the Cloud Discovery dashboard and see what new apps are being used, and follow the instructions in this article again to make sure your organization and your data are protected.
If you run into any problems, we're here to help. To get assistance or support for your product issue, please open a support ticket.
- Try our interactive guide: Discover and manage cloud app usage with Microsoft Defender for Cloud Apps
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