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Well-known Security Identifiers

Overview#

Well-known Security Identifiers (ObjectSID, Well-known SIDs) are a group of SIDs that provide Identification of generic users or generic groups and the Security Identifier values remain constant across all Microsoft Windows Operating Systems.

We refer you to the source: Well-known security identifiers in Windows operating systems

SIDNAMEDescriptionFSMO Role
S-1-0-0NobodyNo security principal.
S-1-0Null AuthorityAn identifier authority.
S-1-1-0EveryoneA group that includes all users, even anonymous users and guests. Membership is controlled by the Operating System.
Note By default, the Everyone group no longer includes anonymous users on a computer that is running Windows XP Service Pack 2 (SP2).
S-1-1World AuthorityAn identifier authority.
S-1-2-0LocalA group that includes all users who have logged on locally.
S-1-2-1Console LogonA group that includes users who are logged on to the physical console.
Note Added in Windows 7 and Windows Server 2008 R2
S-1-2Local AuthorityAn identifier authority.
S-1-3-0Creator OwnerA placeholder in an inheritable access control entry (ACE). When the ACE is inherited, the system replaces this SID with the SID for the object's creator.
S-1-3-1Creator groupA placeholder in an inheritable ACE. When the ACE is inherited, the system replaces this SID with the SID for the primary group of the object's creator. The primary group is used only by the POSIX subsystem.
S-1-3-2Creator Owner ServerThis SID is not used in Windows Server 2000.
S-1-3-3Creator group ServerThis SID is not used in Windows Server 2000.
S-1-3-4Owner RightsA group that represents the current owner of the object. When an ACE that carries this SID is applied to an object, the system ignores the implicit READ_CONTROL and WRITE_DAC permissions for the object owner.
S-1-3Creator AuthorityAn identifier authority.
S-1-4Non-unique AuthorityAn identifier authority.
S-1-5- 21 domain -572Denied RODC Password Replication groupA Domain Local Group group. Members in this group cannot have their passwords replicated to any read-only domain controllers in the domainPDC Emulator FSMO Role
S-1-5- 21domain -498Enterprise Read-only Domain ControllersA Universal Group. Members of this group are Read-Only Domain Controllers in the enterprisePDC Emulator FSMO Role
S-1-5- 21domain -521Read-only Domain ControllersA Global Group. Members of this group are Read-Only Domain Controllers in the domainPDC Emulator FSMO Role
S-1-5-1DialupA group that includes all users who have logged on through a dial-up connection. Membership is controlled by the Operating System.
S-1-5-10Principal SelfA placeholder in an inheritable ACE on an account object or group object in Active Directory. When the ACE is inherited, the system replaces this SID with the SID for the security principal who holds the account.
S-1-5-11Authenticated UsersA group that includes all users whose identities were authenticated when they logged on. Membership is controlled by the operating system.
S-1-5-12Restricted CodeThis SID is reserved for future use.
S-1-5-13Terminal Server UsersA group that includes all users that have logged on to a Terminal Services server. Membership is controlled by the Operating System
S-1-5-14Remote Interactive LogonA group that includes all users who have logged on through a terminal services logon.
S-1-5-15This OrganizationA group that includes all users from the same organization. Only included with AD accounts and only added by a Windows Server 2003 or later domain controller.
S-1-5-17This OrganizationAn account that is used by the default Internet Information Services (IIS) user.
S-1-5-18Local SystemA service account that is used by the operating system.
S-1-5-19NT AuthorityLocal Service
S-1-5-2NetworkA group that includes all users that have logged on through a network connection. Membership is controlled by the operating system.
S-1-5-20NT AuthorityNetwork Service
S-1-5-21 domain -571Allowed RODC Password Replication groupA Domain Local group. Members in this group can have their passwords replicated to all read-only domain controllers in the domain.PDC Emulator FSMO Role
S-1-5-21-domain-522Cloneable Domain ControllersA Global group. Members of this group that are Domain Controller may be cloned.PDC Emulator FSMO Role
S-1-5-21domain-500AdministratorA user account for the system administrator. By default, it is the only user account that is given full control over the system.
S-1-5-21domain-501GuestA user account for people who do not have individual accounts. This user account does not require a password. By default, the Guest account is disabled.
S-1-5-21domain-502KRBTGTA service account that is used by the Key Distribution Center (KDC) service.
S-1-5-21domain-512Domain AdminsA Global Group whose members are authorized to administer the domain. By default, the Domain Admins group is a member of the Administrators group on all computers that have joined a domain, including the domain controllers. Domain Admins is the default owner of any object that is created by any member of the group.
S-1-5-21domain-513Domain UsersA Global Group that, by default, includes all user accounts in a domain. When you create a user account in a domain, it is added to this group by default.
S-1-5-21domain-514Domain GuestsA Global Group that, by default, has only one member, the domain's built-in Guest account.
S-1-5-21domain-515Domain ComputersA Global Group that includes all clients and servers that have joined the domain.
S-1-5-21domain-516Domain ControllersA Global Group that includes all domain controllers in the domain. New domain controllers are added to this group by default.
S-1-5-21domain-517Cert PublishersA Global Group that includes all computers that are running an enterprise certification authority. Cert Publishers are authorized to publish certificates for User objects in Active Directory.
S-1-5-21domain-520group Policy Creator OwnersA Global Group that is authorized to create new group Policy objects in Microsoft Active Directory. By default, the only member of the group is Administrator.
S-1-5-21domain-526Key AdminsA security group. The intention for this group is to have delegated write access on the msdsKeyCredentialLink attribute only. The group is intended for use in scenarios where trusted external authorities (for example, Active Directory Federated Services) are responsible for modifying this attribute. Only trusted administrators should be made a member of this group.
S-1-5-21domain-527Enterprise Key AdminsA security group. The intention for this group is to have delegated write access on the msdsKeyCredentialLink attribute only. The group is intended for use in scenarios where trusted external authorities (for example, Active Directory Federated Services) are responsible for modifying this attribute. Only trusted administrators should be made a member of this group.
S-1-5-21domain-553RAS and IAS ServersA Domain Local Group . By default, this group has no members. Servers in this group have Read Account Restrictions and Read Logon Information access to User objects in the Active Directory domain local group.
S-1-5-21root domain-518Schema AdminsA universal group in a native-mode domain; a Global Group in a mixed-mode domain. The group is authorized to make schema changes in Active Directory. By default, the only member of the group is the Administrator account for the forest root domain.
S-1-5-21root domain-519Enterprise AdminsA universal group in a native-mode domain; a global group in a mixed-mode domain. The group is authorized to make forest-wide changes in Active Directory, such as adding child domains. By default, the only member of the group is the Administrator account for the forest root domain.
S-1-5-3BatchA group that includes all users that have logged on through a batch queue facility. Membership is controlled by the operating system.
S-1-5-32-544AdministratorsA built-in group. After the initial installation of the operating system, the only member of the group is the Administrator account. When a computer joins a domain, the Domain Admins group is added to the Administrators group. When a server becomes a domain controller, the Enterprise Admins group also is added to the Administrators group.
S-1-5-32-545UsersA built-in group. After the initial installation of the operating system, the only member is the Authenticated Users group. When a computer joins a domain, the Domain Users group is added to the Users group on the computer.
S-1-5-32-546GuestsA built-in group. By default, the only member is the Guest account. The Guests group allows occasional or one-time users to log on with limited privileges to a computer's built-in Guest account.
S-1-5-32-547Power UsersA built-in group. By default, the group has no members. Power users can create local users and groups; modify and delete accounts that they have created; and remove users from the Power Users, Users, and Guests groups. Power users also can install programs; create, manage, and delete local printers; and create and delete file shares.
S-1-5-32-548Account OperatorsA built-in group that exists only on domain controllers. By default, the group has no members. By default, Account Operators have permission to create, modify, and delete accounts for users, groups, and computers in all containers and organizational units of Active Directory except the Built-in container and the Domain Controllers OU. Account Operators do not have permission to modify the Administrators and Domain Admins groups, nor do they have permission to modify the accounts for members of those groups.
S-1-5-32-549Server OperatorsA built-in group that exists only on domain controllers. By default, the group has no members. Server Operators can log on to a server interactively; create and delete network shares; start and stop services; back up and restore files; format the hard disk of the computer; and shut down the computer.
S-1-5-32-550Print OperatorsA built-in group that exists only on domain controllers. By default, the only member is the Domain Users group. Print Operators can manage printers and document queues.
S-1-5-32-551Backup OperatorsA built-in group. By default, the group has no members. Backup Operators can back up and restore all files on a computer, regardless of the permissions that protect those files. Backup Operators also can log on to the computer and shut it down.
S-1-5-32-552ReplicatorsA built-in group that is used by the File Replication service on domain controllers. By default, the group has no members. Do not add users to this group.
S-1-5-32-554BUILTIN\Pre-Windows 2000 Compatible AccessAn alias added by Windows 2000. A backward compatibility group which allows read access on all users and groups in the domain.PDC Emulator FSMO Role
S-1-5-32-555BUILTIN\Remote Desktop UsersAn alias. Members in this group are granted the right to logon remotely.PDC Emulator FSMO Role
S-1-5-32-556BUILTIN\Network Configuration OperatorsAn alias. Members in this group can have some administrative privileges to manage configuration of networking features.PDC Emulator FSMO Role
S-1-5-32-557BUILTIN\Incoming Forest Trust BuildersAn alias. Members of this group can create incoming, one-way trusts to this forest.PDC Emulator FSMO Role
S-1-5-32-558BUILTIN\Performance Monitor UsersAn alias. Members of this group have remote access to monitor this computer.PDC Emulator FSMO Role
S-1-5-32-559BUILTIN\Performance Log UsersAn alias. Members of this group have remote access to schedule logging of performance counters on this computer.PDC Emulator FSMO Role
S-1-5-32-560BUILTIN\Windows Authorization Access groupAn alias. Members of this group have access to the computed tokengroupsGlobalAndUniversal attribute on User objects.PDC Emulator FSMO Role
S-1-5-32-561BUILTIN\Terminal Server License ServersAn alias. A group for Terminal Server License Servers. When Windows Server 2003 Service Pack 1 is installed, a new local group is created.PDC Emulator FSMO Role
S-1-5-32-562BUILTIN\Distributed COM UsersAn alias. A group for COM to provide computerwide access controls that govern access to all call, activation, or launch requests on the computer.PDC Emulator FSMO Role
S-1-5-32-569BUILTIN\Cryptographic OperatorsA Builtin Local group. Members are authorized to perform cryptographic operations.PDC Emulator FSMO Role
S-1-5-32-573BUILTIN\Event Log ReadersA Builtin Local group. Members of this group can read event logs from local machine.PDC Emulator FSMO Role
S-1-5-32-574BUILTIN\Certificate Service DCOM AccessA Builtin Local group. Members of this group are allowed to connect to Certification Authorities in the enterprise.PDC Emulator FSMO Role
S-1-5-32-575BUILTIN\RDS Remote Access ServersA Builtin Local group. Servers in this group enable users of RemoteApp programs and personal virtual desktops access to these resources. In Internet-facing deployments, these servers are typically deployed in an edge network. This group needs to be populated on servers running RD Connection Broker. RD Gateway servers and RD Web Access servers used in the deployment need to be in this group.PDC Emulator FSMO Role
S-1-5-32-576BUILTIN\RDS Endpoint ServersA Builtin Local group. Servers in this group run virtual machines and host sessions where users RemoteApp programs and personal virtual desktops run. This group needs to be populated on servers running RD Connection Broker. RD Session Host servers and RD Virtualization Host servers used in the deployment need to be in this group.PDC Emulator FSMO Role
S-1-5-32-577BUILTIN\RDS Management ServersA Builtin Local group. Servers in this group can perform routine administrative actions on servers running Remote Desktop Services. This group needs to be populated on all servers in a Remote Desktop Services deployment. The servers running the RDS Central Management service must be included in this group.PDC Emulator FSMO Role
S-1-5-32-578BUILTIN\Hyper-V AdministratorsA Builtin Local group. Members of this group have complete and unrestricted access to all features of Hyper-V.PDC Emulator FSMO Role
S-1-5-32-579BUILTIN\Access Control Assistance OperatorsA Builtin Local group. Members of this group can remotely query authorization attributes and permissions for resources on this computer.PDC Emulator FSMO Role
S-1-5-32-580BUILTIN\Remote Management UsersA Builtin Local group. Members of this group can access WMI resources over management protocols (such as WS-Management via the Windows Remote Management service). This applies only to WMI namespaces that grant access to the user.PDC Emulator FSMO Role
S-1-5-4InteractiveA group that includes all users that have logged on interactively. Membership is controlled by the operating system.
S-1-5-5-X-YLogon SessionA logon session. The X and Y values for these SIDs are different for each session.
S-1-5-6ServiceA group that includes all security principals that have logged on as a service. Membership is controlled by the operating system.
S-1-5-64-10NTLM AuthenticationA SID that is used when the NTLM authentication package authenticated the client
S-1-5-64-14SChannel AuthenticationA SID that is used when the SChannel authentication package authenticated the client.
S-1-5-64-21Digest AuthenticationA SID that is used when the Digest authentication package authenticated the client.
S-1-5-7AnonymousA group that includes all users that have logged on anonymously. Membership is controlled by the operating system.
S-1-5-8ProxyThis SID is not used in Windows 2000.
S-1-5-80-0All ServicesA group that includes all service processes configured on the system. Membership is controlled by the operating system.
Note Added in Windows Vista and Windows Server 2008
S-1-5-80-0NT SERVICES\ALL SERVICESA group that includes all service processes that are configured on the system. Membership is controlled by the operating system.
Note Added in Windows Server 2008 R2
S-1-5-80NT ServiceAn NT Service account prefix
S-1-5-83-0NT VIRTUAL MACHINE\Virtual MachinesA built-in group. The group is created when the Hyper-V role is installed. Membership in the group is maintained by the Hyper-V Management Service (VMMS). This group requires the "Create Symbolic Links" right (SeCreateSymbolicLinkPrivilege), and also the "Log on as a Service" right (SeServiceLogonRight).
Note Added in Windows 8 and Windows Server 2012
S-1-5-9Enterprise Domain ControllersA group that includes all domain controllers in a forest that uses an Active Directory directory service. Membership is controlled by the operating system.
S-1-5NT AuthorityAn identifier authority.
S-1-16-0Untrusted Mandatory LevelAn untrusted integrity level. Note Added in Windows Vista and Windows Server 2008
Note Added in Windows Vista and Windows Server 2008
S-1-16-12288High Mandatory LevelA high integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-16384System Mandatory LevelA system integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-20480Protected Process Mandatory LevelA protected-process integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-28672Secure Process Mandatory LevelA secure process integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-4096Low Mandatory LevelA low integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-8192Medium Mandatory LevelA medium integrity level.
Note Added in Windows Vista and Windows Server 2008
S-1-16-8448Medium Plus Mandatory LevelA medium plus integrity level.
Note Added in Windows Vista and Windows Server 2008

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