Category: Windows POST Exploitation

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Windows Powershell Enumeration POST Exploit

Hello aspiring hackers. The exploit we will see today is a POST exploitation Metasploit exploit that performs Powershell enumeration in Windows. Windows PowerShell is a task automation and configuration management framework designed by Microsoft which consists of a command line shell and associated scripting language built on the .NET Framework and .NET Core.

PowerShell provides full access to COM and WMI, enabling administrators to perform administrative tasks on both local and remote Windows systems. Its same as a command line shell but powershell is more powerful than CMD. It is a very helpful tool for network asministrators. If used properly, it can also be used by hackers to the full potential.

But we need to know about the Powershell settings installed on the target system for this. This powershell enumeration module exactly does that for us. Let us see how this module works. Just like any Metasploit POST module, we need to have a valid meterpreter session to run this module. Background the current meterpreter session and load the powershell environment enumeration module as shown below. Type command “info” to view the information about this module as shown below.

Powershellenum1

Type command “show options” to view the options to be configured. Set the session ID of the meterpreter session we just sent to background and execute the module using command “run”.

powershell enumeration

As you can see in the image above, our module successfully completed powershell enumeration of the target machine. Powershell version 2.0 is installed on our target system an there are no powershell snap-ins are installed. It seems none of the users have powershell profiles.

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Enumerate Installed Programs on Windows

Hello aspiring hackers. In this howto, we will see how to enumerate installed programs a Windows system after compromise. This is a POST exploit in Metasploit which means this exploit is only available when we get a meterpreter session on the target system. Once a Windows system is hacked, privilege escalation is the next step. One of the ways to escalate privileges in a Windows system would be to find vulnerabilities in the programs installed in our target Windows system. We can do this manually but Metasploit has a post module to do exactly this. Let us see how to use it.

Send the current meterpreter session to background and load the enum_applications module as shown below. Just like any other POST module, it needs only one option, the session id of the meterpreter session we just sent to background.

module to enumerate installed programs on a windows target after gaining access

Set the session Id and execute the module as shown below.

Enumapps2

As you can see, the module successfully gave us the programs installed on our victim’s system. Now we can search for any vulnerabilities in those programs which we could be used in privilege escalation. That is how we enumerate Installed programs in Windows.

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Meterpreter architecture migration exploit

Hello aspiring hackers. You all know about the meterpreter payload. It is an advanced dynamically extensible payload of Metasploit. Meterpreter architecture migration exploit is a “post” exploit used to migrate from one architecture to another architecture. What is architecture? As we all know there are two main system architectures 32bit and 64bit.

Sometimes we happen to run our exploit from a 32bit machine to hack a 64bit machine or run our exploit from a 64bit machine to hack a 32bit machine. The meterpreter payload spawns a process according to the architecture of the attacking system. If the attacking system is 32bit, the meterpreter process is 32bit and if the attacking system is 64bit the meterpreter process is 64bit.

Sometimes there may be compatibility issues if we get a 32bit meterpreter session on a 64bit machine and vice versa. This is the exact reason why this module has been introduced. For example, in one of our previous howto, we hacked a 64bit machine from a 32bit Kali Linux. So we have a 32bit meterpreter session on a 64bit target system. To overcome the problems of incompatibility, we need to start a 64bit meterpreter session.

It is exactly in cases like these, this module comes handy. This module checks if the architecture of meterpreter is as same as the architecture of OS and if it is not, spawns a new process with the correct architecture and migrates into that process. Let’s see how this module works.

To use this module, we need to background the current session using command “background”. Then load the exploit as shown below. Type command “show options” to have a look at the options it requires.

meterpreter architecture migration from 32bit to 64bit and vice versa

We need to only set the session id of the meterpreter session we just sent to background and the exploit is good to go.

Archmigrate2

If you see in the above image, our exploit failed to run for the first time. This is because in the previous session we had system privileges and if we run this module we may lose the system privileges. But don’t worry we can change the options to overcome this problem.

Set “ignore_system” option to true and you should be fine to go. This time the exploit ran successfully. As you can see in the above image, our target is a 64bit machine and our meterpreter migrated to a 64bit process successfully. Lets check by typing command “session s -l” to see the available sessions. You can see we have a 64bit meterpreter now. Job performed.

Archmigrate3
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Windows Post exploitation recon with Metasploit

Hello aspiring hackers. Till now we have seen various ways of hacking Windows, elevating privileges and creating a persistent backdoor for later access. After we have successfully created a backdoor, it’s time to perform further reconnaissance. Windows post exploitation recon helps us in gathering further info about our target network. This can be helpful to us in finding more vulnerable systems to hack and pivot.

If you have observed carefully while starting Metasploit, it has number of modules specified as “post”. Some of these are useful in recon. For us to do post recon we need to first hack the system and get metertpreter session on it. Now let us see how to perform this recon with Metasploit.

The first module useful in reconnaissance in the arp scanner. Arp scanner helps us to identify any hidden devices in the network. Hidden devices are those devices which don’t respond to normal requests like ping etc. For example, some firewalls intentionally don’t respond to ping requests. ARP scanning can detect these devices.

Winpostexrc1

The checkvm module helps us to find out if the machine we hacked is a virtual machine, which in this case is true.

The dumplinks module will parse .lnk files from a user’s Recent Documents folder and Microsoft Office’s Recent Documents folder, if present. Windows creates these link files automatically for many common file types. The .lnk files contain time stamps, file locations, including share names, volume serial numbers, and more.

In some cases, we need to know what are the applications installed in the system we hacked. For example, in a case where we cannot escalate privileges and maybe a vulnerable program installed in the target can help us in privilege escalation. The enum_applications module exactly does that.

We can see in this specific case, there are only two programs installed.

Image explaining about windows post exploitation reconnaissance

The enum_logged_on_users module helps us in finding out the users logged in. This may help us in knowing the usernames of the system.

In our case, we go to know the username as “admin”.

Winpostexrc6

The enum_shares module will list the shares of both configured and recently used shares on the compromised system. My target doesn’t have any shares.

Winpostexrc7

The enum_snmp module will enumerate the SNMP service on the target, if installed. It will also enumerate its community strings.

In our case, there’s no SNMP service installed.

Winpostexrc8

The hashdump module does exactly what it says. It dumps the password hashes from the target system as shown below. May I remind you that meterpreter already has this hashdump function.

Winpostexrc9

The usb_history module retrieves the history of usb devices connected to the target system. In my case, no USB devices were connected to the target.

Winpostexrc10

The most interesting of all these is the lester script. The lester script suggests local exploits for the target system. This script automatically searches and lists exploits for the targeted system. Now you may question why do we need exploits for the system we already hacked. Well maybe to escalate privileges or find an exploit which gives us more power on the system.

Winpostexrc11

That’s all for today folks. I will be back soon.

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Upgrade command shell to Meterpreter session

Hello friends.. I took a long break from the blog (actually I was channeling my energy on my monthly magazine Hackercool). But I am here now back with a bang or should I say hack. Ok, Most of the times we only get a command shell on our target while hacking, although we wish we got a meterpreter session .Today we will see how to upgrade the command shell to meterpreter.

First thing we need is to background the current command shell session. Hit on CTRL+C. Don’t abort the session altogether. If it happened by mistake ( like it happened to me below), select “no” when it asks whether to abort a session. Then hit CTRL+Z and select Yes. Your session has been sent to background. Remember the session number.

Shell To Meterpreter1 300x136 1

Load the command shell to meterpreter upgrade module. We need only one option, the session id we sent to background.

Image explaining about upgrading command shell to meterpreter

Specify the session id and run the exploit as shown below. We will get the meterpreter session.

Shell To Meterpreter3

Type command “sessions -l” to see all our sessions as shown below.

Shell To Meterpreter4

We can load the meterpreter session as shown below.

Shell To Meterpreter5

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