Governance, risk, and compliance
Organizations of all sizes are constrained by their available resources; financial, people, and time. To achieve an effective return on investment (ROI) organizations must prioritize where they will invest. Implementation of security across the organization is also constrained by this, so to achieve an appropriate ROI on security the organization needs to first understand and define its security priorities.
Governance – How is the organization’s security going to be monitored, audited, and reported? Design and implementation of security controls within an organization is only the beginning of the story. How does the organization know that things are actually working? Are they improving? Are there new requirements? Is there mandatory reporting? Similar to compliance there may be external industry, government or regulatory standards that need to be considered.
Risk – What types of risks does the organization face while trying to protect identifiable information, Intellectual Property (IP), financial information? Who may be interested or could leverage this information if stolen, including external and internal threats as well as unintentional or malicious? A commonly forgotten but extremely important consideration within risk is addressing Disaster Recovery and Business Continuity.
Compliance – Are there specific industry, government, or regulatory requirements that dictate or provide recommendation on criteria that your organization’s security controls must meet? Examples of such standards, organizations, controls, and legislation are ISO27001, NIST, PCI-DSS.
The collective role of organization(s) is to manage the security standards of the organization through their lifecycle:
Define - Set organizational standards and policies for practices, technologies, and configurations based on internal factors (organizational culture, risk appetite, asset valuation, business initiatives, etc.) and external factors (benchmarks, regulatory standards, threat environment, and more)
Improve – Continually push these standards incrementally forward towards the ideal state to ensure continual risk reduction.
Sustain – Ensure the security posture doesn’t degrade naturally over time by instituting auditing and monitoring compliance with organizational standards.
Prioritize security best practices investments
Security best practices are ideally applied proactively and completely to all systems as you build your cloud program, but this isn’t reality for most enterprise organizations. Business goals, project constraints, and other factors often cause organizations to balance security risk against other risks and apply a subset of best practices at any given point.
We recommend applying as many as of the best practices as early as possible, and then working to retrofit any gaps over time as you mature your security program. We recommend evaluating the following considerations when prioritizing which to follow first:
High business impact and highly exposed systems – These include systems with direct intrinsic value as well as the systems that provide attackers a path to them. For more information, see Identify and classify business critical applications.
Easiest to implement Mitigations– Identify quick wins by prioritizing the best practices, which your organization can execute quickly because you already have the required skills, tools, and knowledge to do it (for example, implementing a Web App Firewall (WAF) to protect a legacy application).
Be careful not to exclusively use (or overuse) this short-term prioritization method. Doing so can increase your risk by preventing your program from growing and leaving critical risks exposed for extended periods.
Microsoft has provided some prioritized lists of security initiatives to help organizations start with these decisions based on our experience with threats and mitigation initiatives in our own environments and across our customers. See Module 4a of the Microsoft CISO Workshop
Manage connected tenants
Ensure your security organization is aware of all enrollments and associated subscriptions connected to your existing environment (via ExpressRoute or Site-Site VPN) and monitoring as part of the overall enterprise.
These azure resources are part of your enterprise environment and security organizations require visibility into them. Security organizations need this access to assess risk and to identify whether organizational policies and applicable regulatory requirements are being followed.
Ensure all Azure environments that connect to your production environment/network apply your organization’s policy and IT governance controls for security. You can discover existing connected tenants using a tool provided by Microsoft. Guidance on permissions you may assign to security is in the Assign privileges for managing the environment section.
Clear lines of responsibility
Designate the parties responsible for specific functions in Azure
Clearly documenting and sharing the contacts responsible for each of these functions will create consistency and facilitate communication. Based on our experience with many cloud adoption projects, this will avoid confusion that can lead to human and automation errors that create security risk.
Designate groups (or individual roles) that will be responsible for these key functions:
|Group or individual role||Responsibility|
|Network Security||Typically existing network security team. Configuration and maintenance of Azure Firewall, Network Virtual Appliances (and associated routing), WAFs, NSGs, ASGs, etc.|
|Network Management||Typically existing network operations team. Enterprise-wide virtual network and subnet allocation.|
|Server Endpoint Security||Typically IT operations, security, or jointly. Monitor and remediate server security (patching, configuration, endpoint security, etc.).|
|Incident Monitoring and Response||Typically security operations team. Investigate and remediate security incidents in Security Information and Event Management (SIEM) or source console.|
|Policy Management||Typically GRC team + Architecture. Set Direction for use of Role Based Access Control (RBAC), Microsoft Defender for Cloud, Administrator protection strategy, and Azure Policy to govern Azure resources.|
|Identity Security and Standards||Typically Security Team + Identity Team jointly. Set direction for Azure AD directories, PIM/PAM usage, MFA, password/synchronization configuration, Application Identity Standards.|
Enterprise segmentation strategy
Identify groups of resources that can be isolated from other parts of the enterprise to contain (and detect) adversary movement within your enterprise. This unified enterprise segmentation strategy will guide all technical teams to consistently segment access using networking, applications, identity, and any other access controls.
A clear and simple segmentation strategy helps contain risk while enabling productivity and business operations.
An enterprise segmentation strategy is defined higher than a traditional “network segmentation” security strategy. Traditional segmentation approaches for on premises environments frequently failed to achieve their goals because they were developed “bottom-up” by different technical teams and were not aligned well with business use cases and application workloads. This resulted in overwhelming complexity that generates support issues and often undermines the original purpose with broad network firewall exceptions.
Creating a unified enterprise segmentation strategy enables to guide all technical teams stakeholders (IT, Security, Applications, etc.) Business Units that is built around the business risks and needs will increase alignment to and understand and support sustainability of the security containment promises. This clarity and alignment will also reduce s the risk of human errors and automation failures that can lead to security vulnerabilities, operational downtime, or both.
While network micro-segmentation also offers promise to reduce risk (discussed more in Network Security and Containment section), it doesn’t eliminate the need to align technical teams. Micro segmentation should be considered after to and plans to ensure the ensuring technical teams are aligned so you can avoid a recurrence of the internal conflicts that plagued and confusion of the on-premises network generation segmentation strategies.
Here are Microsoft's recommendations for prioritizing initiatives on containment and segmentation (based on Zero Trust principles). These recommendations are listed in priority order by highest importance.
Ensure alignment of technical teams to a single enterprise segmentation strategy.
Invest in broadening containment by establishing a modern perimeter based on zero trust principles focused on identity, device, applications, and other signals (to overcome limitation of network controls to protect new resources and attack types).
Bolster network controls for legacy applications by exploring micro segmentation strategies.
A good enterprise segmentation strategy meets these criteria:
Enables Operations – Minimizes operation friction by aligning to business practices and applications
Contains Risk - Adds cost and friction to attackers by
Isolating sensitive workloads from compromise of other assets
Isolating high exposure systems from being used as a pivot to other systems
Monitored – Security Operations should monitor for potential violations of the integrity of the segments (account usage, unexpected traffic, etc.)
Security team visibility
Provide security teams read-only access to the security aspects of all technical resources in their purview
Security organizations require visibility into the technical environment to perform their duties of assessing and reporting on organizational risk. Without this visibility, security will have to rely on information provided from groups operating the environment who have a potential conflict of interest (and other priorities).
Note that security teams may separately be granted additional privileges if they have operational responsibilities or a requirement to enforce compliance on Azure resources.
For example in Azure, assign security teams to the Security Readers permission that provides access to measure security risk (without providing access to the data itself)
For enterprise security groups with broad responsibility for security of Azure, you can assign this permission using:
Root management group – for teams responsible for assessing and reporting risk on all resources
Segment management group(s) – for teams with limited scope of responsibility (typically required because of organizational boundaries or regulatory requirements)
Because security will have broad access to the environment (and visibility into potentially exploitable vulnerabilities), you should consider them critical impact accounts and apply the same protections as administrators. The Administration section details these controls for Azure.
Assign privileges for managing the environment
Grant roles with operational responsibilities in Azure the appropriate permissions based on a clearly documented strategy built from the principle of least privilege and your operational needs.
Providing clear guidance that follows a reference model will reduce risk because by increasing it provides clarity for your technical teams implementing these permissions. This clarity makes it easier to detect and correct human errors like overpermissioning, reducing your overall risk.
Microsoft recommends starting from these Microsoft reference models and adapting to your organization.
Core Services Reference Permissions
This segment hosts shared services utilized across the organization. These shared services typically include Active Directory Domain Services, DNS/DHCP, System Management Tools hosted on Azure Infrastructure as a Service (IaaS) virtual machines.
Security Visibility across all resources – For security teams, grant read-only access to security attributes for all technical environments. This access level is needed to assess risk factors, identify potential mitigations, and advise organizational stakeholders who accept the risk. See Security Team Visibility for more details.
Policy management across some or all resources – To monitor and enforce compliance with external (or internal) regulations, standards, and security policy, assign appropriate permission to those roles. The roles and permissions you choose will depend on the organizational culture and expectations of the policy program. See Microsoft Cloud Adoption Framework for Azure.
Central IT operations across all resources – Grant permissions to the central IT department (often the infrastructure team) to create, modify, and delete resources like virtual machines and storage.
Central networking group across network resources – To ensure consistency and avoid technical conflicts, assign network resource responsibilities to a single central networking organization. These resources should include virtual networks, subnets, Network Security Groups (NSG), and the virtual machines hosting virtual network appliances. See Centralize Network Management And Security for more details
Resource Role Permissions – For most core services, administrative privileges required to manage them are granted via the application itself (Active Directory, DNS/DHCP, System Management Tools, etc.), so no additional Azure resource permissions are required. If your organizational model requires these teams to manage their own VMs, storage, or other Azure resources, you can assign these permissions to those roles.
Service admin (Break Glass Account) – Use the service admin role only for emergencies (and initial setup if required). Do not use this role for daily tasks. See Emergency Access (‘Break Glass’ Accounts) for more details.
Segment reference permissions
This segment permission design provides consistency while allowing flexibility to accommodate the range of organizational models from a single centralized IT group to mostly independent IT and DevOps teams.
Security visibility across all resources – For security teams, grant read-only access to security attributes for all technical environments. This access level is needed to assess risk factors, identify potential mitigations, and advise organizational stakeholders who accept the risk. See Security Team Visibility.
Policy management across some or all resources – To monitor and enforce compliance with external (or internal) regulations, standards, and security policy assign appropriate permission to those roles. The roles and permissions you choose will depend on the organizational culture and expectations of the policy program. See Microsoft Cloud Adoption Framework for Azure.
IT Operations across all resources – Grant permission to create, modify, and delete resources. The purpose of the segment (and resulting permissions) will depend on your organization structure.
Segments with resources managed by a centralized IT organization can grant the central IT department (often the infrastructure team) permission to modify these resources.
Segments managed by independent business units or functions (such as a Human Resources IT Team) can grant those teams permission to all resources in the segment.
Segments with autonomous DevOps teams don’t need to grant permissions across all resources because the resource role (below) grants permissions to application teams. For emergencies, use the service admin account (break-glass account).
Central networking group across network resources – To ensure consistency and avoid technical conflicts, assign network resource responsibilities to a single central networking organization. These resources should include virtual networks, subnets, Network Security Groups (NSG), and the virtual machines hosting virtual network appliances. See Centralize Network Management And Security.
Resource Role Permissions – Segments with autonomous DevOps teams will manage the resources associated with each application. The actual roles and their permissions depend on the application size and complexity, the application team size and complexity, and the culture of the organization and application team.
Service Admin (Break Glass Account) – Use the service admin role only for emergencies (and initial setup if required). Do not use this role for daily tasks. See Emergency Access (‘Break Glass’ Accounts) for more details.
Permission Guidance and Tips
To drive consistency and ensure application to future subscriptions, permissions should be assigned at management group for the segment rather than the individual subscriptions. See Avoid Granular and Custom Permissions for more details.
You should first review the built-in roles to see if one is applicable before creating a custom role to grant the appropriate permissions to VMs and other objects. See Use Built in Roles for more details
Security managers group membership may be appropriate for smaller teams/organizations where security teams have extensive operational responsibilities.
Establish segmentation with management groups
Structure management groups into a simple design that guides the enterprise segmentation model.
Management groups offer the ability to consistently and efficiently manage resources (including multiple subscriptions as needed). However, because of their flexibility, it's possible to create an overly complex design. Complexity creates confusion and negatively impacts both operations and security (as illustrated by overly complex Organizational Unit (OU) and Group Policy Object (GPO) designs for Active Directory).
Microsoft recommends aligning the top level of management groups (MGs) into a simple enterprise segmentation strategy limited to 1 or 2 levels.
Use root management group carefully
Use the Root Management Group (MG) for enterprise consistency, but test changes carefully to minimize risk of operational disruption.
The root management group enables you to ensure consistency across the enterprise by applying policies, permissions, and tags across all subscriptions. Care must be taken when planning and implementing assignments to the root management group because this can affect every resource on Azure and potentially cause downtime or other negative impacts on productivity in the event of errors or unanticipated effects.
Root management group guidance:
Plan Carefully - Select enterprise-wide elements to the root management group that have a clear requirement to be applied across every resource and/or low impact.
Good candidates include:
Regulatory requirements with clear business risk/impact (for example, restrictions related to data sovereignty).
Near-zero potential negative impact on operations such as policy with audit effect, Tag assignment, RBAC permissions assignments that have been carefully reviewed.
Test First - Carefully test all enterprise-wide changes on the root management group before applying (policy, tags, RBAC model, etc.) using a
Test Lab - Representative lab tenant or lab segment in production tenant.
Production Pilot - Segment MG or Designated subset in subscription(s) / MG.
Validate Changes – to ensure they have the desired effect.
Virtual Machine (VM) security updates and strong passwords
Ensure policy and processes enable (and require) rapid application of security updates to virtual machines.
Attackers constantly scan public cloud IP ranges for open management ports and attempt “easy” attacks like common passwords and unpatched vulnerabilities.
Enable Microsoft Defender for Cloud to identify missing security updates & apply them.
Local Admin Password Solution (LAPS) or a third party Privileged Access Management can set strong local admin passwords and just in time access to them.
Remove Virtual Machine (VM) direct internet connectivity
Ensure policy and processes require restricting and monitoring direct internet connectivity by virtual machines
Attackers constantly scan public cloud IP ranges for open management ports and attempt “easy” attacks like common passwords and known unpatched vulnerabilities
This can be accomplished with one or more methods in Azure:
Enterprise-wide prevention - Prevent inadvertent exposure with an enterprise network and permission model such as the reference model described throughout this guidance. This significantly reduces the risk of accidental VM internet exposure by
Ensuring that network traffic is routed through approved egress points by default
Exceptions (for example, add a public IP address to a resource) must go through a centralized group (which can carefully evaluate exception requests to ensure appropriate controls are applied)
Identify and Remediate exposed VMs using the Microsoft Defender for Cloud network visualization to quickly identify internet exposed resources.
Restrict management ports (RDP, SSH) using Just in Time access in Microsoft Defender for Cloud.
Assign incident notification contact
Ensure a security contact receives Azure incident notifications from Microsoft typically a notification that your resource is compromised and/or attacking another customer.
This enables your security operations team to rapidly respond to potential security risks and remediate them.
Ensure administrator contact information in the Azure enrollment portal includes contact information that will notify security operations (directly or rapidly via an internal process)
Regularly review critical access
Regularly review roles that are assigned privileges with a business-critical impact.
Set up a recurring review pattern to ensure that accounts are removed from permissions as roles change. You can conduct the review manually or through an automated process by using tools such as Azure AD access reviews.
Discover and remediate common risks
Identity well known risks for your Azure tenants, remediate those risks, and track your progress using Secure Score.
Identifying and remediating common security hygiene risks significantly reduces overall risk to your organization by increasing cost to attackers. When you remove cheap and well-established attack vectors, attackers are forced to acquire and use advanced or untested attack methods.
Azure Secure Score in Microsoft Defender for Cloud monitors the security posture of machines, networks, storage and data services, and applications to discover potential security issues (internet connected VMs, or missing security updates, missing endpoint protection or encryption, deviations from baseline security configurations, missing Web Application Firewall (WAF), and more). You should enable this capability (no additional cost), review the findings, and follow the included recommendations to plan and execute technical remediations starting with the highest priority items.
As you address risks, track progress and prioritize ongoing investments in your governance and risk reduction programs.
Increase automation with Azure Blueprints
Use Azure’s native automation capabilities to increase consistency, compliance, and deployment speed for workloads.
Automation of deployment and maintenance tasks reduces security and compliance risk by limiting opportunity to introduce human errors during manual tasks. This will also allow both IT Operations teams and security teams to shift their focus from repeated manual tasks to higher value tasks like enabling developers and business initiatives, protecting information, and so on.
Utilize the Azure Blueprint service to rapidly and consistently deploy application environments that are compliant with your organization’s policies and external regulations. Azure Blueprint Service automates deployment of environments including RBAC roles, policies, resources (VM/Net/Storage/etc.), and more. Azure Blueprints builds on Microsoft’s significant investment into the Azure Resource Manager to standardize resource deployment in Azure and enable resource deployment and governance based on a desired-state approach. You can use built in configurations in Azure Blueprint, make your own, or just use Resource Manager scripts for smaller scope.
Evaluate security using benchmarks
Use an industry standard benchmark to evaluate your organizations current security posture.
Benchmarking allows you to improve your security program by learning from external organizations. Benchmarking lets you know how your current security state compares to that of other organizations, providing both external validation for successful elements of your current system as well as identifying gaps that serve as opportunities to enrich your team’s overall security strategy. Even if your security program isn’t tied to a specific benchmark or regulatory standard, you will benefit from understanding the documented ideal states by those outside and inside of your industry.
- As an example, the Center for Internet Security (CIS) has created security benchmarks for Azure that map to the CIS Control Framework. Another reference example is the MITRE ATT&CK™ framework that defines the various adversary tactics and techniques based on real-world observations. These external references control mappings help you to understand any gaps between your current strategy what you have and what other experts in the industry.
Audit and enforce policy compliance
Ensure that the security team is auditing the environment to report on compliance with the security policy of the organization. Security teams may also enforce compliance with these policies.
Organizations of all sizes will have security compliance requirements. Industry, government, and internal corporate security policies all need to be audited and enforced. Policy monitoring is critical to check that initial configurations are correct and that it continues to be compliant over time.
In Azure, you can take advantage of Azure Policy to create and manage policies that enforce compliance. Like Azure Blueprints, Azure Policies are built on the underlying Azure Resource Manager capabilities in the Azure platform (and Azure Policy can also be assigned via Azure Blueprints).
For more information on how to do this in Azure, please review Tutorial: Create and manage policies to enforce compliance.
Monitor identity Risk
Monitor identity related risk events for warning on potentially compromised identities and remediate those risks.
Most security incidents take place after an attacker initially gains access using a stolen identity. These identities can often start with low privileges, but the attackers then use that identity to traverse laterally and gain access to more privileged identities. This repeats as needed until the attacker controls access to the ultimate target data or systems.
Azure Active Directory uses adaptive machine learning algorithms, heuristics, and known compromised credentials (username/password pairs) to detect suspicious actions that are related to your user accounts. These username/password pairs come from monitoring public and dark web sites (where attackers often dump compromised passwords) and by working with security researchers, law enforcement, Security teams at Microsoft, and others.
There are two places where you review reported risk events:
Azure AD Identity Protection - Risk events are also part of the reporting capabilities of Azure Active Directory Identity Protection.
In addition, you can use the Identity Protection risk events API to gain programmatic access to security detections using Microsoft Graph.
Remediate these risks by manually addressing each reported account or by setting up a user risk policy to require a password change for these high risk events.
Use Penetration Testing to validate security defenses.
Real world validation of security defenses is critical to validate your defense strategy and implementation. This can be accomplished by a penetration test (simulates a one time attack) or a red team program (simulates a persistent threat actor targeting your environment).
Follow the guidance published by Microsoft for planning and executing simulated attacks.
Discover & replace insecure protocols
Discover and disable the use of legacy insecure protocols SMBv1, LM/NTLMv1, wDigest, Unsigned LDAP Binds, and Weak ciphers in Kerberos.
Authentication protocols are a critical foundation of nearly all security assurances. These older versions can be exploited by attackers with access to your network and are often used extensively on legacy systems on Infrastructure as a Service (IaaS).
Here are ways to reduce your risk:
Discover protocol usage by reviewing logs with Microsoft Sentinel’s Insecure Protocol Dashboard or third party tools
We recommend implementing changes using pilot or other testing method to mitigate risk of operational interruption.
Elevated security capabilities
Consider whether to utilize specialized security capabilities in your enterprise architecture.
These measures have the potential to enhance security and meet regulatory requirements, but can introduce complexity that may negatively impact your operations and efficiency.
We recommend careful consideration and judicious use of these security measures as required:
Dedicated Hardware Security Modules (HSMs)
Dedicated Hardware Security Modules (HSMs) may help meet regulatory or security requirements.
Confidential Computing may help meet regulatory or security requirements.
For additional security guidance from Microsoft, see Microsoft security documentation.
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