Skip to main content

Tool to view/recover stored wifi passwords and source code analysis

so i was just walking around my space in the cybers (on twitter to be exact) when i came across this tweet by +KitPloit , one of my more reliable sources of new tools on the penetration testing and vulnerability assessment scene (i am not a hacker of any sort...lol). it mentioned how it was possible to "recover your stored wifi passwords" which my brain translated as "steal someone's wifi passwords" and i decided to check out what sorcery this was by analysing the source code..

the code on github by LionSec had just 120 lines in python and since it was supposed to work for both windows and linux platform (according to the code, mac wasn't supported yet), i assumed the section with respect to windows would be even shorter if you factor in error handling as well.

after checking the imports (sys, subprocess) i immediately realised that some system commands would be called from within the script and executed. that also meant that i could easily reuse that code if i decided to create a metasploit module in ruby.

one more little bit of knowledge i gained here was the platform library. this was my first time using it and it reminded me of when i first met itertools library after i had spent quite some time trying to figure out an efficient way to come up with a script that could go through all possible combinations of a sequence of 3 ports to find the correct port-knocking sequence for one pentest challenge VM i came across on vulnhub. but that's another story altogether...

so i ran a few simple tests with platform and checked its help options (in interpreter mode, just type in help(platform) and you're good to go). Turns out, you can view the system type, version, processor family and even more stuff on the machine the script is running on.

i skipped the linux segment of the code (that's for another post) and jumped straight into the windows segment. The data entry and option selection was simple enough, and then i got to the line i was looking for (line 79):

print check_output("netsh wlan show profile key=clear", shell=True)


i then typed in the command in quotes in command line and immediately got a list of all the wifi networks currently saved on my machine. interesting so far, but not what i was looking for exactly.


i went deeper and then found what i was looking for in line 86:


wifi2 = check_output("netsh wlan show profile name=* key=clear", shell=True)


i proceeded to type in the command in quotes again (but i replaced the profile name's wildcard option * with one of my listed wifi networks) and voila, i got the wifi password in all its cleartext glory!

considering how the execution of this command did not require elevation to administrator privileges first (or maybe i just didnt notice something) it should be possible to create a metasploit module or even a meterpreter script to do this if one does not exist already. so now i will proceed to inform everyone i know of this issue but i have no clue as yet that how can you mitigate it....

till the next blog! 

Comments

Post a Comment

Popular posts from this blog

Password Cracking: RainbowCrack table generation, sorting and usage

I had to do this demo after one of my students asked for my assistance regarding how to use this tool. Usually, I just assign different tools to them individually depending on the aspect of penetration testing we are covering (session hijacking, vulnerability scanning, etc) and then tell them to submit a report and a video demo of how the tool is used. Anyway, after a brief one-to-one discussion I realized the student had actually done the research on how rainbow tables operate (above and beyond the material in the lecture slides) so I figured that if he was here asking for assistance, he genuinely needed it. The tool is available at the RainbowCrack site.  A detailed description of this nifty tool can also be found here . So, firstly I had to generate the rainbow tables. The command line syntax is: rtgen hash_algorithm charset plaintext_len_min plaintext_len_max table_index chain_len chain_num part_index where: hash_algorithm  Rainbow table is hash algorithm specific. R
Post a Comment
Read more

Malware Analysis: A Python Malware on campus 1

So a few weeks back after a class I'd taken with them,  a number of my students told me of a particular malware that was affecting students' computers, in particular, computers running Windows OS. According to them, if you tried to open a folder that was residing on the USB stick with the malware, the malware would delete some of your files and convert folders into executable files. Granted, the likelihood of a random folder miraculously transforming into a single executable file was kinda "out there" but I figured I'd check it out and use that as a teaching moment for those interested in venturing into malware analysis. So I tasked them to bring me a sample of the malware so I could take a look at it and maybe figure it out. I advised one of them to download DumpIt  and then extract the memory dump from an infected computer using a clean flash disk and then bring it to me. How do you do this exactly? here's how: Download DumpIt . It's a portable
Post a Comment
Read more

How I Recovered my Corrupted 2TB Hard Drive without having to copy everything to another Drive

So, a little back story. I have a 2 Terabyte external hard drive that's split into 3 partitions for backup; one for entertainment, one for work and one for personal projects. A friend of mine had a Lenovo laptop that was having challenges with installing WLAN drivers (you'd install the drivers and they'd keep giving an error that drivers aren't working. If you tried to uninstall them, they'd just reappear...but that's a whole different story). Anyway, my friend decided to roll-back from Windows 10 to Windows 8 and wanted to copy one of the test builds from my 2TB HDD so I lent it to him. Little did I know that that Lenovo laptop had other plans for me. Upon connecting the external hard drive to the Lenovo laptop, it immediately read it as a FAT32 formatted drive (it was actually NTFS formatted) and had 1.82 TB free space of the "actual" size 1.82 TB. Where panic would have ensued for many, I managed to keep in the growing irritation at such a thing
1 comment
Read more