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Dec 6, 2019

Stealing Windows Wi-Fi WPA2-PSK Passwords through PowerShell

How to Crack a Wpa2-Psk Password with Windows Posted by Unknown Minggu, 08 Desember 2013 0 komentar It,s very common question on the internet to How to hack a Facebook account password and how to hack a WiFi password. How To Crack Wifi Wpa And Wpa2 Psk Passwords DOWNLOAD. Major password-cracking tool, Hashcat, found a simpler way to hack your WPA/WPA2 enabled Wi-Fi networks. Here's what businesses need to know.

This week, I was hanging out with a friends, who happened toforget their Wi-Fi Password to connect a new device to their network. Idecided, I would find a way and help them out so they could obtain the Wi-Fipassword. It then led me to a thought, that a malicious attacker couldtechnically use the same technique. Or, that it could be a good technique usedwhen pen testing an environment. So, therefore, I have decided to make a blogpost about it. Enjoy!

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Why would I want to view the Windows Wi-Fi passwords?

Some people may use this for legit purposes, where they haveactually lost and forgotten their Wi-Fi passwords. Or they simply need it in anemergency to connect, and need a method to obtain it right away. Others coulduse this technique as a good penetration test to see if they also are able toextract Wi-Fi passwords from victim machines. Regardless of your intentions,here is a tutorial on how you can easily obtain Wi-Fi passwords from machinesrunning Windows 7 and Windows 10.

I was able to obtain this information without needingadministrator level privileges on the machine.

We can simply use PowerShell commands (2 commands needed tobe run) in order to obtain the Wi-Fi passwords.

Let’s get the passwords!

The first command we will use is to get an inventory of theSSID’s/Wi-Fi networks the machines has already connected to and stored thepassword on.

*In my case, I have blurred out the Wi-Fi networks as an added protection for my test machine. But you would see the full name of the Wi-Fi SSID networks.*

The second step now is to target each or a specific SSID toget the password for it.

*In my case, I have blurred out the Wi-Fi networks, and password as an added protection for my test machine. But you would see the full name of the Wi-Fi SSID networks and the password.*

The password is stored in the “Key Content” attribute as a value. This is the password for that is being used to connect to this specific Wi-Fi network.

Why use Windows PowerShell over the GUI?

I believe using command line is better as it can get specificpasswords for a Wi-Fi network more easily than using the Windows GUI. It alsoallows you to get passwords when your offline and not connected to a specific Wi-Finetwork.

The Windows GUI does have some limited such as: not lettingyou view passwords unless you are signed into the specific Wi-Fi network.

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If your pen testing the best approach to stay silent is to use PowerShell or command prompt shell access. This is assuming you have gotten backdoor access to the Windows machine. And, now are able to run PowerShell commands.

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John is able to crack WPA-PSK and WPA2-PSK passwords. Recent changes have improved performance when there are multiple hashes in the input file, that have the same SSID (the routers 'name' string).

The input format is a printable hash, which can either be directly created with john's tool “wpapcap2john” (ships with jumbo) from a packet capture in pcap format as produced by tcpdump, wireshark or airodump-ng; or by doing an intermediate conversion to Hashcat's hccap format as described below.

You can convert airodump's .cap file to .hccap in one of the following ways:

When you have hccap file you need to convert it to john's input format using “hccap2john” program shipped with recent jumbo versions.It encodes hccap file to “$WPAPSK$essid#b64encoded hccap”

Example testcase you can get from http://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=view&target=wpa-Induction.pcap or wpa-Induction.tar.gz

From that point you can use john as you always do. The format comes in two flavours:

-format=wpapsk (will use CPUs, is SIMD and OpenMP capable)
-format=wpapsk-opencl (for any OpenCL GPU or CPUs)