> 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/kerberos/kerberos-key-components.md).

# Composants clés de Kerberos

Notes de sécurité Active Directory pour les composants clés de Kerberos, couvrant l'énumération, Kerberos, les identifiants, l'abus des ACL, le mouvement latéral, le flux de travail d'exploitation et les étapes de validation.

#### KDC

Le **KDC**, ou **Centre de distribution des clés**, est installé sur le contrôleur de domaine.

Il est chargé de délivrer des tickets Kerberos.

Il contient deux composants principaux :

* **AS** : Service d'authentification ;
* **TGS** : Service d'octroi de tickets.

#### AS — Service d'authentification

Le **AS** est la partie du KDC responsable de l'authentification initiale de l'utilisateur.

Elle se produit lorsque l'utilisateur se connecte au domaine.

#### TGS — Service d'octroi de tickets

Le **TGS** est la partie du KDC chargée de fournir des tickets pour accéder à des services spécifiques.

Exemples de services :

* partage SMB ;
* service HTTP ;
* MSSQL ;
* LDAP ;
* CIFS ;
* service d'application interne.

#### compte krbtgt

Dans Active Directory, un compte spécial est créé par défaut :

```
krbtgt
```

Ce compte est utilisé par le KDC pour signer et chiffrer certains tickets Kerberos.

Il est extrêmement sensible car il est lié au fonctionnement de l'authentification Kerberos dans le domaine.

<figure><img src="https://3840167291-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-7c8a6ef448c24f1baeab22ace91f57c2243c2e89%2F%7B7BBF6600-3664-4149-8F1E-EEF1CFBBD6E6%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


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