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Dec 26

Interesting Windows Computer & Active Directory Well-Known Security Identifiers (SIDs)

The Microsoft Knowledge Base article KB243330 lists the well-known security identifiers in Windows operating systems 

Listed here are the more interesting ones from the article as well as some additional ones.

Local Computer SIDs

SID: S-1-5-2
Name: Network
Description: A group that includes all users that have logged on through a network connection. Membership is controlled by the operating system.

SID: S-1-5-6
Name: Service
Description: A group that includes all security principals that have logged on as a service. Membership is controlled by the operating system.

SID: S-1-5-9
Name: Enterprise Domain Controllers
Description: A group that includes all domain controllers in a forest that uses an Active Directory directory service. Membership is controlled by the operating system.

SID: S-1-5-11
Name: Authenticated Users
Description: A group that includes all users whose identities were authenticated when they logged on. Membership is controlled by the operating system.

SID: S-1-5-18
Name: Local System
Description: A service account that is used by the operating system.

SID: S-1-5-19
Name: NT Authority
Description: Local Service

SID: S-1-5-20
Name: NT Authority
Description: Network Service

New Local Computer SIDs in Windows 8.1, Windows 2012 R2, and earlier operating systems (with KB2871997):

LOCAL_ACCOUNT (S-1-5-113) – any local account
LOCAL_ACCOUNT_AND_MEMBER_OF_ADMINISTRATORS_GROUP (S-1-5-114)

 

Active Directory Domain SIDs’

SID: S-1-5-21<DOMAIN>-500
Name: Administrator
Description: A user account for the system administrator. By default, it is the only user account that is given full control over the system.

SID: S-1-5-21<DOMAIN>-501
Name: Guest
Description: 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.

SID: S-1-5-21<DOMAIN>-502
Name: KRBTGT
Description: A service account that is used by the Key Distribution Center (KDC) service.

SID: S-1-5-21<DOMAIN>-512
Name: Domain Admins
Description: 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.

SID: S-1-5-21<DOMAIN>-513
Name: Domain Users
Description: 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.

SID: S-1-5-21<DOMAIN>-514
Name: Domain Guests
Description: A global group that, by default, has only one member, the domain’s built-in Guest account.

SID: S-1-5-21<DOMAIN>-515
Name: Domain Computers
Description: A global group that includes all clients and servers that have joined the domain.

SID: S-1-5-21<DOMAIN>-516
Name: Domain Controllers
Description: A global group that includes all domain controllers in the domain. New domain controllers are added to this group by default.

SID: S-1-5- 21<DOMAIN>-498
Name: Enterprise Read-only Domain Controllers
Description: A Universal group. Members of this group are Read-Only Domain Controllers in the enterprise
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5- 21<DOMAIN>-521
Name: Read-only Domain Controllers
Description: A Global group. Members of this group are Read-Only Domain Controllers in the domain
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-21<DOMAIN>-517
Name: Cert Publishers
Description: 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.

SID: S-1-5-21<ROOTDOMAIN>-518
Name: Schema Admins
Description: 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.

SID: S-1-5-21<ROOTDOMAIN>-519
Name: Enterprise Admins
Description: 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.

SID: S-1-5-21<DOMAIN>-520
Name: Group Policy Creator Owners
Description: 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.

SID: S-1-5-32-544
Name: Administrators
Description: 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.

SID: S-1-5-32-545
Name: Users
Description: 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.

SID: S-1-5-32-546
Name: Guests
Description: 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.

SID: S-1-5-32-548
Name: Account Operators
Description: 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.

SID: S-1-5-32-549
Name: Server Operators
Description: 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.

SID: S-1-5-32-550
Name: Print Operators
Description: 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.

SID: S-1-5-32-551
Name: Backup Operators
Description: 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.

SID: S-1-5-32-552
Name: Replicators
Description: 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

SID: S-1-5-32-557
Name: BUILTIN\Incoming Forest Trust Builders
Description: An alias. Members of this group can create incoming, one-way trusts to this forest.

SID: S-1-5-32-569
Name: BUILTIN\Cryptographic Operators
Description: A Builtin Local group. Members are authorized to perform cryptographic operations.
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-21<DOMAIN>-571
Name: Allowed RODC Password Replication Group
Description: A Domain Local group. Members in this group can have their passwords replicated to all read-only domain controllers in the domain.
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-21<DOMAIN>-572
Name: Denied RODC Password Replication Group
Description: A Domain Local group. Members in this group cannot have their passwords replicated to any read-only domain controllers in the domain
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-32-573
Name: BUILTIN\Event Log Readers
Description: A Builtin Local group. Members of this group can read event logs from local machine.
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-32-574
Name: BUILTIN\Certificate Service DCOM Access
Description: A Builtin Local group. Members of this group are allowed to connect to Certification Authorities in the enterprise.
New with Windows Server 2008 Active Directory schema (or newer)

SID: S-1-5-21-<DOMAIN>–522
Name: Cloneable Domain Controllers
Description: A Global group. Members of this group that are domain controllers may be cloned.
New with Windows Server 2012 Active Directory schema (or newer)

SID: S-1-5-32-578
Name: BUILTIN\Hyper-V Administrators
Description: A Builtin Local group. Members of this group have complete and unrestricted access to all features of Hyper-V.
New with Windows Server 2012 Active Directory schema (or newer)

SID: S-1-5-32-579
Name: BUILTIN\Access Control Assistance Operators
Description: A Builtin Local group. Members of this group can remotely query authorization attributes and permissions for resources on this computer.
New with Windows Server 2012 Active Directory schema (or newer)

SID: S-1-5-32-580
Name: BUILTIN\Remote Management Users
Description: A 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.
New with Windows Server 2012 Active Directory schema (or newer)

SID: S-1-5-64-10
Name: NTLM Authentication
Description: A SID that is used when the NTLM authentication package authenticated the client

SID: S-1-5-64-14
Name: SChannel Authentication
Description: A SID that is used when the SChannel authentication package authenticated the client.

SID: S-1-5-64-21
Name: Digest Authentication
Description: A SID that is used when the Digest authentication package authenticated the client.

SID: S-1-5-80
Name: NT Service
Description: An NT Service account prefix

SID: S-1-5-80-0
NT SERVICES\ALL SERVICES
Name: All Services
Description: A group that includes all service processes that are configured on the system. Membership is controlled by the operating system.

 

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