# Overpass the hash

This technique is a form of [pass the key](/ad/movement/kerberos/ptk.md).

Kerberos offers 4 different key types: DES, RC4, AES-128 and AES-256.

When attackers know the RC4 key (which is in fact the user's NT hash), and when the RC4 etype is not disabled, they can use it to obtain Kerberos tickets.

{% content-ref url="/pages/6IV8jltazXYvBG3FI1qh" %}
[Pass the key](/ad/movement/kerberos/ptk.md)
{% endcontent-ref %}


---

# Agent Instructions: 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:

```
GET https://red.infiltr8.io/ad/movement/kerberos/opth.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.