Forest hackthebox

Ohh, a Substition Cipher. I noticed repeating words in the ciphertext. Skip to content. Branch: master. Create new file Find file History. Latest commit Fetching latest commit….

forest hackthebox

Stego Challenge: Forest 40 Points Explore the forest and capture the flag! Let's check the image using binwalk and strings command first. Nothing interesting here. Let's try stegsolve and use different bit planes. Let's try! And we got something from steghide! Gur gerrf uryc perngr n fcrpvny raivebazrag juvpu, va ghea, nssrpgf gur xvaqf bs navznyf naq cynagf gung pna rkvfg va gur sberfg.

Gerrf ner na vzcbegnag pbzcbarag bs gur raivebazrag. Gurl pyrna gur nve, pbby vg ba ubg qnlf, pbafreir urng ng avtug, naq npg nf rkpryyrag fbhaq nofbeoref. Decoding the ciphertext will gives us this message: The forest is a complex ecosystem consisting mainly of trees that buffer the earth and support a myriad of life forms.

The trees help create a special environment which, in turn, affects the kinds of animals and plants that can exist in the forest. Trees are an important component of the environment. They clean the air, cool it on hot days, conserve heat at night, and act as excellent sound absorbers. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Nov 2, Uploaded image for forest challenge.Forest was an easy rated Windows machine and was a great opportunity for me to practice attacks I had only read about up until now.

The initial foothold was gained by enumerating user accounts then performing an ASREPRoast attack to get a user's hash. The hash was cracked and Evil-WinRM was used to gain a low privilege shell. Bloodhound was used to map out the shortest path to administrator access which involved Microsoft Exchange having higher privileges than needed. These permissions and privileges were used to create a new user with DCSync privileges which enabled dumping the admin hash.

This hash is just as good as the password for our uses and yielded an admin shell. Nmap scan report for forest. From these results we can see the the domain name is 'htb. The ports make it pretty clear this is a domain controller. BloodHound has been on my to-learn list for a while and this was a perfect opportunity to give it a whirl. The ps1 file was then imported:. The zip file was downloaded and imported into BloodHound. Having it show the shortest path to domain admin yielded this:.

The graph tells us that svc-alfredo is a member of the 'service accounts' group, which is a member of the 'privileged IT accounts' group, which is in turn a member of the 'account operators' group.

The 'account operators' group has GenericAll permissions for 'Exchange Windows Permissions' which has WriteDacl on the domain, which naturally contains the 'administrator' user. I wasn't exactly sure how to take advantage of all this and googling around lead me to this article on abusing Exchange. Rather than mess around with the svc-alfredo account, I decided to create a new one since we are part of the 'account operators' group:.

With ntlmrelayx ready and waiting, the Exchange article linked above uses a 'privexchange. Now that we have DCSync privileges, we can run secretsdump. Enumeration nmap scan: Nmap scan report for forest. I checked SMB shares first and that was a no-go.

Enum4linux yielded some users: I put the 'normal' looking usernames into a text file: That pretty much did it for the initial enumeration. The ps1 file was then imported: It took a few tries to get the syntax below right: The zip file was downloaded and imported into BloodHound. Having it show the shortest path to domain admin yielded this: Now if you look to the south, you can clearly make out the constellation Scorpiown The graph tells us that svc-alfredo is a member of the 'service accounts' group, which is a member of the 'privileged IT accounts' group, which is in turn a member of the 'account operators' group.Ohh, a Substition Cipher.

I noticed repeating words in the ciphertext. Skip to content. Branch: master. Create new file Find file History. Latest commit.

forest hackthebox

Latest commit a Nov 2, Stego Challenge: Forest 40 Points Explore the forest and capture the flag! Let's check the image using binwalk and strings command first. Nothing interesting here.

Let's try stegsolve and use different bit planes. Let's try! And we got something from steghide! Gur gerrf uryc perngr n fcrpvny raivebazrag juvpu, va ghea, nssrpgf gur xvaqf bs navznyf naq cynagf gung pna rkvfg va gur sberfg.

HackTheBox Writeup: Forest

Gerrf ner na vzcbegnag pbzcbarag bs gur raivebazrag. Gurl pyrna gur nve, pbby vg ba ubg qnlf, pbafreir urng ng avtug, naq npg nf rkpryyrag fbhaq nofbeoref. Decoding the ciphertext will gives us this message: The forest is a complex ecosystem consisting mainly of trees that buffer the earth and support a myriad of life forms.

The trees help create a special environment which, in turn, affects the kinds of animals and plants that can exist in the forest. Trees are an important component of the environment. They clean the air, cool it on hot days, conserve heat at night, and act as excellent sound absorbers.

You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.As usual I add the IP of the Forest machine I found there are several ports opened, it seems interesting to me.

Configuration

The domain services like kerberosldapSMB and WinRM port are open and accessable from the internet — which in reality a huge vulnaribility. So, being a Windows system administrator for more than 10 years, I know where to start.

forest hackthebox

I can use a tool called enum4linux to see if I can enumerate user and other domain information. So as expected, Enum4linux command returned with a lot of information.

Hackthebox Forest Walkthrough

Within the information, I found few users seb astienlucinda ,andy ,marksanti and service account called svc-alfresco. Also, I found the domain policy was so loosely configured — no p assword complexity enforced.

This hints that the password can be easily cracked. I as well found the server as well installed with a Microsoft Exchange instance. I tried the user names I gathered in previous step — but none worked, luckily the service account svc-alfresco revealed his TGT ticket-granting ticket.

I used the rockyou. Now that I had a user shell, my next goal is to get admin shell. But this script need to upload to the Forest machine. Since the user svc-alfresco has rights to create a folder within C, I made a temporary directory called the temp Now that I had this directory, I uploaded the Sharphound.

Now I got the SharpHound. I download the file was successfully transferred and I loaded instantly into BloodHound by simply dragging and dropping it. Local domain. As soon as I authenticate, I can see the user svc-alfresco got permission.

And, we have the password hash from htb. Vote count: 1. No votes so far! Be the first to rate this post. I started this blog to share my knowledge. I usually write on HackTheBox machines and challenges, cybersecurity-related articles and bug-bounty.There are already several interesting things in this result.

First of all, this a domain-connected system to the HTB. It has kerberos, ldap adn SMB services exposed to the outside world and appears as if it is a domain controller. And last but not least, it has a WinRM port open. Enum4linux provides a lot of interesting things. First of all I see that there are some users sebastien,lucinda,andy,mark,santi present and an apparent service account svc-alfresco.

There appears to be an Microsoft Exchange installation present which is commonly known to be a big security issue if it is not configured correct! And a last line confirms the hunch, Forest is actually part of the domain controlers group! After trying it for some users, I finally got a TGT for the user svc-alfresco which I could try to crack using hashcat.

Next up is privilege escalation, after pressing CTRL-C for too many times, I decided it was time to have a simple fallback in place. I start a netcat connection back to my system while in another terminal, I have a listener waiting.

All rights reserved. Now all that is left is transfer the file to my local machine and analyze it with BloodHound. User So the file was successfully transferred and can be loaded instantly into BloodHound by simply dragging and dropping it. Local domain, and thereby obtain for instance the Password Hashes. After that however, I got stuck for a long while due to the very specific syntax and switches required and available with the impacket tools.

I open up a browser to localhost and provide the sedje credentials. DIT secrets htb. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Skip to content. Nmap done: 1 IP address 1 host up scanned in Protected: UnderTheWire.

Hackthebox — Craft July 21, January 15, Anko 0. Leave a Reply Cancel reply Your email address will not be published.Forest is an easy difficulty machine running Windows. It tests your knowledge in Basic enumeration and privelege escalation using common commands as well as using tools such as Bloodhound. Be sure to checkout the Basic Setup section before you get started. Like always, enumeration is our first port of call.

From our scan we can see a few things that may be of interest. Looks like we have found a few… Nice! We have the user.

To find a path to own the Domain Administrator we will use Bloodhound. We grab the data we need by using Sharphound :. We can then download bloodhound. As we expected we move through the groups we saw earlier until we see that we are also in the Account Operators group with GenericAll permissions.

If we hover over GenericAll we can right click and select Help :. From here we get literal instructions to add ourselves to the Domain Admins group with PowerView which seems a little too hopeful. Downloading PowerView to the victim machine and trying this results in Permission Denied. Using the Exchange Windows Permissions group instead we get some success:. We see that we have been added to the group when we check with net user svc-alfresco. However, after some time it disappears.

Meaning the account is reset to avoid spoilers.

HackTheBox – Forest Writeup

So we will try and create another account and add that user to the Exchange Windows Permissions group:. Oh and we almost forgot! Add your new user to the Remote Management Users group:. Going back to Bloodhound if we hover over WriteDacl we can right click and select Help once again:. Again we get instructions on how to give ourselves DCSync writes which will hopefully allow us to extract hashes of the Domain Administrator. Now we can use mimikatz to extract the Administrator hash:.

This box was really fun to do and fun to help people with as well. The concept was real world in the sense of misconfigurations that can help an attacker gain unauthorized access to a machine.March 21, Forest was a fun 20 point box created by egre55 and mrb3n.

You then have to Invoke-BloodHound and abuse the privileges our user has to get root. Checking out SMB you can use nullinux to enumerate users present on the box:.

The svc-alfresco hash can be cracked easily with hashcat :. You can use evil-winrm to login with the credentials:. With a shell as svc-alfresco you can simply type the user flag:. After some basic manual enumeration I decided to use BloodHound. BloodHound uses graph theory to reveal the hidden and often unintended relationships within an Active Directory environment. Attacks can use BloodHound to easily identify highly complex attack paths that would otherwise be impossible to quickly identify.

Defenders can use BloodHound to identify and eliminate those same attack paths. Both blue and red teams can use BloodHound to easily gain a deeper understanding of privilege relationships in an Active Directory environment.

With bloodhound up and running you can simply drop the. The pathways tab in the top left corner allows you to find the shortest path between two nodes, in this instance the path from svc-alfresco to adminstrator is shown:.

LOCAL domain.

HackTheBox [Forest]

The following excerpts from adsecurity sums up the two permissions:. The right to modify the DACL in the object security descriptor. Example : A service account may be granted this right to perform delegation in AD. If an attacker can guess this password or potentially crack it by Kerberoastingthey now set their own permissions on associated objects which can lead to Full Control of an object which may involve exposure of a LAPS controlled local Administrator password.

The following command will add svc-alfresco to the Exchange Windows Permissions group:. What now? The following article by fox-it covers some interesting topics in regards to escalating privileges with ACLs in AD. The DCSync attack can be carried in a few different ways, you can use Mimikatzsecretsdump. First you need to upgrade the evil-winrm shell to a meterpreter session as the Mimikatz executable acts strangely in the evil-winrm shell.

You then need to add svc-alfresco into the Exchange Windows Permissions group:. Once the command completes you can run mimikatz. With the hash dumped successfully you can then login using wmiexec. First you run the PowerShell one-liner:. Then run secretsdump. You can then login with the administrator hash using another Impacket script - wmiexec.

The method is based on the following article. First you need to add svc-alfresco to the Exchange Windows Permissions group:. You then need to run the ntlmrelayx. With that done you can run secretsdump. You need neo4j and bloodhound running with the.

forest hackthebox

You then just have to run secretsdump. With a shell as administrator using any of the techniques shown, you can simply type the root flag:. Data: bytes of bytes copied Info: Upload successful! DIT secrets htb.


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