How are the critical systems exposed to these dependencies, and what are the additional risks associated with those dependencies?How critical are the services being managed, and what is the expected loss if those services are compromised?Include your cloud services in this assessment - attackers increasingly target insecure cloud deployments, and it is vital that you administer those services as securely as you would your on-premises mission-critical applications.Use this assessment to identify the specific systems which require additional protection, and then extend your PAW program to the administrators of those systems. For more information on the ESAE administrative forest, see - PAWs should be used for at least the Global administrator and Subscription Billing administrator. Do not modify any of the scripts or the comma-separated value (CSV) file.While this script will create the new security groups, it will not populate them automatically.Move each account that is a member of the Domain Admin, Enterprise Admin, or Tier 0 equivalent groups (including nested membership) to this OU. For example, although it is possible to prevent an administrator from successfully logging onto a user desktop with privileged credentials, the simple act of attempting the logon can expose the credentials to malware installed on that user desktop. Link the "PAW Configuration - Computer" GPO as follows:In this section, you will create a new "PAW Configuration - User" GPO which provide specific protections for these PAWs and link to the Tier 0 Accounts OU ("Accounts" under Tier 0\Admin).Do not add these settings to the Default Domain PolicyGo to User Configuration\Preferences\Windows Settings\Registry. This guidance has additional details below on PAW usage at Microsoft in the section "How Microsoft uses admin workstations". These include the DNS Server service and critical network devices like Internet proxies.The clean source principle requires all security dependencies to be as trustworthy as the object being secured.Any subject in control of an object is a security dependency of that object. For additional information on validating software, please refer to For more information, see the "Automatically Approve Updates for Installation" section in the Download all the files and save them to the same directory, and run them in the order specified below. The PAW security model is based partly on the assumption that the PAW user account has privileged rights on managed systems or over the PAW itself, but not both.Ideally, no personnel are assigned to duties at multiple tiers to enforce the principle of segregation of duties, but Microsoft recognizes that many organizations may have limited staff (or other organizational requirements) that don't allow for this full segregation. All usage and duration of these privileges should be captured in the change approval board record after the task is completed.This section contains an approach for an administrative forest based on the Enhanced Security Administrative Environment (ESAE) reference architecture deployed by Microsoft's cybersecurity professional services teams to protect customers against cybersecurity attacks.Dedicated administrative forests allow organizations to host administrative accounts, workstations, and groups in an environment that has stronger security controls than the production environment.This architecture enables a number of security controls that aren't possible or easily configured in a single forest architecture, even one managed with Privileged Access Workstations (PAWs). For more information, see the "Automatically Approve Updates for Installation" section in Approving Updates.Security Baselines should be used as starting configurations.Customers can use the Microsoft Security Compliance Toolkit (SCT) for configuring the baselines on the administrative hosts.Secure Boot to mitigate against attackers or malware attempting to load unsigned code into the boot process.This feature was introduced in Windows 8 to leverage the Unified Extensible Firmware Interface (UEFI).Full volume encryption to mitigate against physical loss of computers, such as administrative laptops used remotely.USB restrictions to protect against physical infection vectors.Network isolation to protect against network attacks and inadvertent admin actions. This account should be protected by a stringent physical control process.Accounts configured for multi-factor authentication should be configured to set a new NTLM hash on accounts regularly. PAWs are recommended for administration of identity systems, cloud services, and private cloud fabric as well as sensitive business functions.The PAW architecture doesn't require a 1:1 mapping of accounts to workstations, though this is a common configuration. These include mitigating attacks on the environment and risks that can decrease the effectiveness of PAW controls over time:A PAW will not protect an environment from an adversary that has already gained administrative access over an Active Directory Forest. Guidelines include:The Tier columns in this table refer to the Tier level of the administrative account, the control of which typically impacts all assets in that tier.Operational decisions that are made on a regular basis are critical to maintaining the security posture of the environment.

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