CertTemplate

This article outlines the CertTemplate node in BloodHound, it describes what the node represents, the node’s properties, and possible incoming/outgoing edges.

Representation

The CertTemplate node represents the Active Directory LDAP objects of the pKICertificateTemplate class located in the Certificate Templates container in the Configuration Naming Context.

Node properties

The node supports the properties of the table. Three types of property names will be used, depending on where the property is found:

• Entity Panel: Name shown in the BloodHound UI.
• Database: Name stored in the BloodHound database and returned by the BloodHound API. This is to be used when running Cypher queries.
• Directory: Name collected from the directory the node is stored in, for example, the LDAP name for an Active Directory property.

Entity Panel	Database	Directory	Description
Display Name	displayname	displayName	The display name of the object.
Object ID	objectid	objectGUID	The object’s unique identifier in the directory.
ACL Inheritance Denied	isaclprotected	nTSecurityDescriptor	Whether inherited permissions (ACEs) from containers are blocked on this object.
Application Policies Required	applicationpolicies	msPKI-RA-Application-Policies	The required RA application policy EKU in the counter signatures of certificate requests.
Application Policy Extensions	certificateapplicationpolicy	msPKI-Certificate-Application-Policy	List of EKUs that might go into issued certificates (see Effective EKUs).
Authentication Enabled	authenticationenabled	-	Whether the certificate can be used for authentication. See this blog post for more details on how it is calculated: https://posts.specterops.io/adcs-attack-paths-in-bloodhound-part-1-799f3d3b03cf
Authorized Signatures Required	authorizedsignatures	msPKI-RA-Signature	Specifies the number of enrollment registration authority signatures that are required in an enrollment request.
Certificate Name Flags	certificatenameflag	msPKI-Certificate-Name-Flag	Contains the flags related to constructing the Subject and Subject Alternative Name in an issued certificate.
Created	whencreated	whenCreated	When the object was created in the directory.
Distinguished Name	distinguishedname	distinguishedName	The name of the object and its location in AD.
Domain FQDN	domain	-	The fully qualified domain name (FQDN) of the domain the object belongs to.
Domain SID	domainsid	-	The SID of the domain the object belongs to.
Effective EKUs	effectiveekus	-	The list EKUs that will be in the Enhanced Key Usage (2.5.29.37) property of issued certificates.  It will contain the EKUs of msPKI-Certificate-Application-Policy by default. It will contain the EKUs of pKIExtendedKeyUsage instead if the schema version is 1 and pKIExtendedKeyUsage is not empty.
Enhanced Key Usage	ekus	pKIExtendedKeyUsage	List of EKUs that might go into issued certificates (see Effective EKUs).
Enrollee Supplies Subject	enrolleesuppliessubject	msPKI-Certificate-Name-Flag (CT_FLAG_ENROLLEE_SUPPLIES _SUBJECT)	Whether the certificate template requires the enrollee to supply the Subject Alternative Name data.
Enrollment Flags	enrollmentflag	msPKI-Enrollment-Flag	Contains enrollment-related flags.
Issuance Policies Required	issuancepolicies	msPKI-RA-Policies	Contains the list of required policy OIDs from those who sign enrollment requests.
Issuance Policy Extensions	certificatepolicy	msPKI-Certificate-Policy	List of issuance polices that are included in issued certificates.
Last Collected by BloodHound	lastseen	-	When the object was last collected and ingested in BloodHound.
No Security Extension	nosecurityextension	msPKI-Certificate-Name-Flag (CT_FLAG_NO_SECURITY_ EXTENSION)	Whether issued certificates will include a certificate extension (SID of the enrollee), which may be required for authentication.
OID	oid	msPKI-Cert-Template-OID	Specifies the object identifier of the certificate template.
Renewal Period	renewalperiod	pKIOverlapPeriod	The period by which issued certificates should be renewed before they expire.
Requires Manager Approval	requiresmanagerapproval	msPKI-Enrollment-Flag (CT_FLAG_PEND_ALL_REQUESTS)	Whether certificate requests will require manager approval.
Schema Version	schemaversion	ms-PKI-Template-Schema-Version	The schema version of the certificate template.
Subject Alternative Name Require DNS	subjectaltrequiredns	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ALT_ REQUIRE_DNS)	Whether the certificate template requires the DNS name of the subject for the Subject Alternative Name.
Subject Alternative Name Require Domain DNS	subjectaltrequiredomaindns	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ALT_ REQUIRE_DOMAIN_DNS)	Whether the certificate template requires the domain DNS name of the subject for the Subject Alternative Name.
Subject Alternative Name Require Email	subjectaltrequireemail	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ALT_ REQUIRE_EMAIL)	Whether the certificate template requires the email of the subject for the Subject Alternative Name.
Subject Alternative Name Require SPN	subjectaltrequirespn	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ALT_ REQUIRE_SPN)	Whether the certificate template requires the UPN (yes, not the SPN) of the subject for the Subject Alternative Name.
Subject Alternative Name Require UPN	subjectaltrequireupn	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ALT_ REQUIRE_UPN)	Whether the certificate template requires the UPN of the subject for the Subject Alternative Name.
Subject Require Email	subjectrequireemail	msPKI-Certificate-Name-Flag (CT_FLAG_SUBJECT_ REQUIRE_EMAIL)	Whether the certificate template requires the email of the subject.
Validity Period	validityperiod	pKIExpirationPeriod	The validity period for issued certificates.
-	name	name + domain name	Name of the object + @ + the name of the domain.

Edges

The following edge types may be linked to/from this node. See the edges documentation for more information on the edge types.

Incoming edges

Edge type	Entity panel category
AllExtendedRights	Inbound Object Control
DelegatedEnrollmentAgent	-
Enroll	Inbound Object Control
EnrollOnBehalfOf	-
GenericAll	Inbound Object Control
GenericWrite	Inbound Object Control
Owns	Inbound Object Control
WriteDacl	Inbound Object Control
WriteOwner	Inbound Object Control
WritePKIEnrollmentFlag	Inbound Object Control
WritePKINameFlag	Inbound Object Control

Outgoing edges

Edge type	Entity panel category
EnrollOnBehalfOf	-
ExtendedByPolicy	-
PublishedTo	-

References

• https://techcommunity.microsoft.com/t5/ask-the-directory-services-team/designing-and-implementing-a-pki-part-i-design-and-planning/ba-p/396953 
• https://learn.microsoft.com/en-us/windows/win32/adschema/c-pkicertificatetemplate