Specify security requirements for data workloads
Your on-premises and cloud data must be protected from both inadvertent and malicious access. Inadvertent access occurs when a user gains access to data that, based on their roles and responsibilities, they should not have. The result can be unintended data leakage, data destruction, or violations of data security and privacy regulations. Malicious access occurs when an external attacker or a malicious insider intentionally tries to access data. Malicious insiders can use your data for profit or to harm your organization. External attackers can delete, alter, exfiltrate, and encrypt your most sensitive data, leaving you open to a ransomware attack.
For both types of attacks, you must take the necessary steps to identify your data, protect it, prevent its destruction or exfiltration, and ensure that only users with a business purpose have access to it. Protecting your data is part of the "assume breach" Zero Trust principle. Even with all the user account and device protections in place, you must assume that an attacker could find their way in and begin traversing your environment, searching for the most valuable data for your organization.
Before establishing the security requirements for data workloads, you must first know your data. In other words, understand your data landscape and identify important information across your cloud and on-premises environment. During this process of better understanding your data, you can execute the following steps:
|1. Determine data classification levels.||Data Security Architect|
|2. Determine built-in and custom sensitive information types.||Data Security Architect|
|3. Determine the use of pre-trained and custom trainable classifiers.||Data Security Architect|
|4. Discover and classify sensitive data.||Data Security Architect and/or Data Security Engineer|
Once you know your data, you can establish key requirements such as:
Data protection across all data workloads: protect your sensitive data throughout its lifecycle by applying sensitivity labels linked to protection actions like encryption, access restrictions, visual markings, and more.
Prevent data loss: apply a consistent set of data loss prevention policies across the cloud, on-premises environments, and endpoints to monitor, prevent, and remediate risky activities with sensitive data.
Use least privilege access: apply minimal permissions consisting of who is allowed to access and what they're allowed to do with data to meet business and productivity requirements.
Security posture management for data
Just like any other cloud workload, data workloads need to have an ongoing security assessment to improve the overall security posture. Azure Purview is a unified data governance service that helps you manage and govern your on-premises, multi-cloud, and software-as-a-service (SaaS) data. Create a holistic, up-to-date map of your data landscape with automated data discovery, sensitive data classification, and end-to-end data lineage. Enable data curators to manage and secure your data estate. Empower data consumers to find valuable, trustworthy data.
Microsoft Defender for Cloud integration with Azure Purview allows you to obtain vital layer of metadata from Azure Purview and use in alerts and recommendations: information about any potentially sensitive data involved. This knowledge helps solve the triage challenge and ensures security professionals can focus their attention on threats to sensitive data. The example below shows a SQL database status in Defender for Cloud, with the data enrichment coming from Azure Purview in the low left corner:
Data workloads include databases, and to provide security posture management for databases you can use Microsoft Defender for SQL. Microsoft Defender for Cloud is available for Azure SQL Database, Azure SQL Managed Instance, and Azure Synapse Analytics. It includes functionality for surfacing and mitigating potential database vulnerabilities and detecting anomalous activities that could indicate a threat to your database. It provides a single go-to location for enabling and managing these capabilities. Security recommendations for SQL database will be surfaced in Defender for Cloud as shown the screen below:
An advanced threat protection service continuously monitors your SQL servers for threats such as SQL injection, brute-force attacks, and privilege abuse. This service provides action-oriented security alerts in Microsoft Defender for Cloud with details of the suspicious activity, guidance on how to mitigate to the threats, and options for continuing your investigations with Microsoft Sentinel. Learn more about advanced threat protection.
In addition to SQL, you need to also take in considerations cloud-native database such as Azure Cosmos DB. Microsoft Defender for Azure Cosmos DB detects potential SQL injections, known bad actors based on Microsoft Threat Intelligence, suspicious access patterns, and potential exploitation of your database through compromised identities, or malicious insiders. Defender for Azure Cosmos DB uses advanced threat detection capabilities, and Microsoft Threat Intelligence data to provide contextual security alerts. Those alerts also include steps to mitigate the detected threats and prevent future attacks.