Windows Security Identifiers

8 minute read

Instead of having to check the Microsoft docs every time I needed to identify a mysterious SID, I decided to type up the table here so I can reference it easily when required.

The following PowerShell snippet can also be used to identify the name corresponding to a SID:

PS C:\Users\New> $sid = New-Object System.Security.Principal.SecurityIdentifier("S-1-5-32-544")
PS C:\Users\New> $name = $sid.Translate([System.Security.Principal.NTAccount])
PS C:\Users\New> Write-Output $name.Value
BUILTIN\Administrators


Well-Known SIDs

SID Name Description
S-1-0 Null Authority An identifier authority.
S-1-0-0 Nobody No security principal.
S-1-1 World Authority An identifier authority.
S-1-1-0 Everyone A group that includes all users, even anonymous users and guests. Membership is controlled by the operating system.
S-1-2 Local Authority An identifier authority.
S-1-2-0 Local A group that includes all users who have logged on locally.
S-1-3 Creator Authority An identifier authority.
S-1-3-0 Creator Owner A 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-1-3-1 Creator Group A 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-1-3-4 Owner Rights A 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-1-4 Non-unique Authority An identifier authority.
S-1-5 NT Authority An identifier authority.
S-1-5-1 Dialup A group that includes all users who have logged on through a dial-up connection. Membership is controlled by the operating system.
S-1-5-2 Network A group that includes all users that have logged on through a network connection. Membership is controlled by the operating system.
S-1-5-3 Batch A group that includes all users that have logged on through a batch queue facility. Membership is controlled by the operating system.
S-1-5-4 Interactive A group that includes all users that have logged on interactively. Membership is controlled by the operating system.
S-1-5-5-X-Y Logon Session A logon session. The X and Y values for these SIDs are different for each session.
S-1-5-6 Service A group that includes all security principals that have logged on as a service. Membership is controlled by the operating system.
S-1-5-7 Anonymous A group that includes all users that have logged on anonymously. Membership is controlled by the operating system.
S-1-5-9 Enterprise Domain Controllers A group that includes all domain controllers in a forest that uses an Active Directory directory service. Membership is controlled bythe operating system.
S-1-5-10 Principal Self A 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-1-5-11 Authenticated Users A group that includes all users whose identities were authenticated when they logged on. Membership is controlled by the operating system.
S-1-5-12 Restricted Code This SID is reserved for future use.
S-1-5-13 Terminal Server Users A group that includes all users that have logged on to a Terminal Services server. Membership is controlled by the operating system.
S-1-5-14 Remote Interactive Logon A group that includes all users who have logged on through a terminal services logon.
S-1-5-17 This Organization An account that is used by the default Internet Information Services (IIS) user.
S-1-5-18 Local System A service account that is used by the operating system.
S-1-5-19 NT Authority Local Service
S-1-5-20 NT Authority Network Service
S-1-5-21domain-500 Administrator A 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-501 Guest A 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-502 KRBTGT A service account that is used by the Key Distribution Center (KDC) service.
S-1-5-21domain-512 Domain Admins A 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-513 Domain Users A 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-514 Domain Guests A global group that, by default, has only one member, the domain’s built-in Guest account.
S-1-5-21domain-515 Domain Computers A global group that includes all clients and servers that have joined the domain.
S-1-5-21domain-516 Domain Controllers A global group that includes all domain controllers in the domain. New domain controllers are added to this group by default.
S-1-5-21domain-517 Cert Publishers A 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-1-5-21root domain-518 Schema Admins A 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-519 Enterprise Admins A 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-1-5-21domain-520 Group Policy Creator Owners A global group that is authorized to create new Group Policy objects in Active Directory. By default, the only member of the group is Administrator.
S-1-5-21domain-526 Key Admins A 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-527 Enterprise Key Admins A 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-553 RAS and IAS Servers A 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-1-5-32-544 Administrators A 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-1-5-32-545 Users A 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-1-5-32-546 Guests A 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-1-5-32-547 Power Users A 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-1-5-32-548 Account Operators A 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 Builtin 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-1-5-32-549 Server Operators A 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-1-5-32-550 Print Operators A 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-1-5-32-551 Backup Operators A 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-1-5-32-552 Replicators A 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-1-5-32-582 Storage Replica Administrators A built-in group that grants complete and unrestricted access to all features of Storage Replica.
S-1-5-64-10 NTLM Authentication An SID that is used when the NTLM authentication package authenticated the client.
S-1-5-64-14 SChannel Authentication An SID that is used when the SChannel authentication package authenticated the client.
S-1-5-64-21 Digest Authentication An SID that is used when the Digest authentication package authenticated the client.
S-1-5-80 NT Service An NT Service account prefix.