> For the complete documentation index, see [llms.txt](https://ttp.parzival.sh/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ttp.parzival.sh/pentesting/infrastructure/active-directory/delegation-abuse/unconstrained-delegation.md).

# Unconstrained Delegation

Unconstrained delegation the key distribution center (KDC) places a copy of the users TGT inside the service ticket (TGS). When the TGS is provided to the server for service access, the server opens the TGS and places the user’s TGT into memory for further use. This means that the server can now impersonate the user without any restrictions. 

### Enumerating Unconstrained Delegation

```bash
# Locate Unconstrained Delegation in BloodHound
MATCH (c:Computer {unconstraineddelegation:true}) RETURN c
```

### Compromising the Domain

After compromising a server with unconstrained delegation enabled, an attacker can extract any and all TGTs from memory to impersonate them against services in the domain. This means that if we identify a Domain Administrators TGT in memory, 

### Notes

* Domain Controllers always have unconstrained delegation enabled by default. 
* Using `Rubeus` monitor command is a good way to identify any new TGTs on a compromised server. 

### References

{% embed url="<https://adsecurity.org/?p=1667>" %}

{% embed url="<https://www.ired.team/offensive-security-experiments/active-directory-kerberos-abuse/domain-compromise-via-unrestricted-kerberos-delegation>" %}

{% embed url="<https://posts.specterops.io/hunting-in-active-directory-unconstrained-delegation-forests-trusts-71f2b33688e1>" %}


---

# 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://ttp.parzival.sh/pentesting/infrastructure/active-directory/delegation-abuse/unconstrained-delegation.md?ask=<question>&goal=<endgoal>
```

`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.