hacktricks/network-services-pentesting/pentesting-kerberos-88/README.md

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# 88tcp/udp - Pentesting Kerberos
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<details>
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</details>
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## Informações Básicas
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Primeiramente, o Kerberos é um protocolo de autenticação, não de autorização. Em outras palavras, ele permite identificar cada usuário, que fornece uma senha secreta, no entanto, ele não valida a quais recursos ou serviços esse usuário pode acessar.\
O Kerberos é usado no Active Directory. Nessa plataforma, o Kerberos fornece informações sobre os privilégios de cada usuário, mas é responsabilidade de cada serviço determinar se o usuário tem acesso aos seus recursos.
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**Porta padrão:** 88/tcp/udp
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```
PORT STATE SERVICE
88/tcp open kerberos-sec
```
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### **Para aprender a abusar do Kerberos, você deve ler o post sobre** [**Active Directory**](../../windows-hardening/active-directory-methodology/)**.**
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## Mais
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### Shodan
* `port:88 kerberos`
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### MS14-068
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Simplificando, a vulnerabilidade permite que um invasor modifique um token de logon de usuário de domínio existente e válido (Ticket Granting Ticket do Kerberos, TGT) adicionando a falsa declaração de que o usuário é um membro do Domain Admins (ou outro grupo sensível) e o Controlador de Domínio (DC) validará essa reivindicação (falsa), permitindo acesso impróprio do invasor a qualquer recurso de domínio (na floresta AD) na rede.
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{% embed url="https://adsecurity.org/?p=541" %}
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Outros exploits: [https://github.com/SecWiki/windows-kernel-exploits/tree/master/MS14-068/pykek](https://github.com/SecWiki/windows-kernel-exploits/tree/master/MS14-068/pykek)
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## Comandos Automáticos do HackTricks
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```
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Protocol_Name: Kerberos #Protocol Abbreviation if there is one.
Port_Number: 88 #Comma separated if there is more than one.
Protocol_Description: AD Domain Authentication #Protocol Abbreviation Spelled out
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Entry_1:
Name: Notes
Description: Notes for Kerberos
Note: |
Firstly, Kerberos is an authentication protocol, not authorization. In other words, it allows to identify each user, who provides a secret password, however, it does not validates to which resources or services can this user access.
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Kerberos is used in Active Directory. In this platform, Kerberos provides information about the privileges of each user, but it is the responsability of each service to determine if the user has access to its resources.
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https://book.hacktricks.xyz/pentesting/pentesting-kerberos-88
Entry_2:
Name: Pre-Creds
Description: Brute Force to get Usernames
Command: nmap -p 88 --script=krb5-enum-users --script-args krb5-enum-users.realm="{Domain_Name}",userdb={Big_Userlist} {IP}
Entry_3:
Name: With Usernames
Description: Brute Force with Usernames and Passwords
Note: consider git clonehttps://github.com/ropnop/kerbrute.git ./kerbrute -h
Entry_4:
Name: With Creds
Description: Attempt to get a list of user service principal names
Command: GetUserSPNs.py -request -dc-ip {IP} active.htb/svc_tgs
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```
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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- Você trabalha em uma **empresa de segurança cibernética**? Você quer ver sua **empresa anunciada no HackTricks**? ou você quer ter acesso à **última versão do PEASS ou baixar o HackTricks em PDF**? Confira os [**PLANOS DE ASSINATURA**](https://github.com/sponsors/carlospolop)!
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- Adquira o [**swag oficial do PEASS & HackTricks**](https://peass.creator-spring.com)
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- **Junte-se ao** [**💬**](https://emojipedia.org/speech-balloon/) [**grupo do Discord**](https://discord.gg/hRep4RUj7f) ou ao [**grupo do telegram**](https://t.me/peass) ou **siga-me** no **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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- **Compartilhe seus truques de hacking enviando PRs para o [repositório hacktricks](https://github.com/carlospolop/hacktricks) e [repositório hacktricks-cloud](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>