Hack of the Day: Wi-Fi SSID Sniffer in 10 Lines of Python

One of the things I left out when I put out the SecurityTube Wi-Fi Security Megaprimer was the programming aspects of Wi-Fi Security and Hacking. Around a decade back, when I used to work as a programmer and researcher, most of my code for Wi-Fi fuzzers / sniffers / injectors was in C. However, C requires you to do everything from scratch. I may take up an example of a Wi-Fi Sniffer in C as a separate blog post. In this post, we will be looking at writing a Wi-Fi Sniffer in Python :)

I've probably used Python for over 6-7 years now and its really been my substitute for C when all I need is quick prototyping. This post should illustrate the power of Python and the great open source library support it has from the community.

[Update] Writing an SSID Sniffer in 11 Lines of Python using Raw Sockets (no 3rd Party Libs)

The code is not as readable as the one on this post but sufficiently proves without a doubt that it can be done :)

Objective: To Code a Wi-Fi SSID Sniffer in 10 Lines of Python

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AIM Sniffer is a handy network utility to capture and log AIM (AOL Instant Messenger) chat from computers within the same LAN.

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Ace Password Sniffer is a program that captures passwords entered in a network. This program can grab any password entered in a PC using the HTTP, FTP, SMPT, POP3 or Telnet protocols.

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Facebook Chat Monitor Sniffer is a utility that can record chat conversations. It only works with the Facebook chat and uses WinPCAP to capture the packets that go around your network.

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Intercepter-NG - Wifi Packet Sniffer Android App

Intercepter-NG – Packet Sniffer Android App

Intercepter-NG is probably the best Wifi Packet Sniffer Android App around and it’s available from the Play Store too!

Intercepter-NG is a very powerful Android packet sniffing App which can sniff both wired and wireless traffic, steal cookies, view usernames/passwords, URL of sites visited and much, much more!  This post will outline some of the features and act as a basic Intercepter-ng tutorial.

It also has a feature similar to Wireshark where you can collect packets sent over the network for analysis later.

When you are connected to a WiFi network you scan the entire network and it will show you all the users on that network, both wired and WiFi.

• The first screen will let you scan for all clients on the network, both wired and wireless and let you select the users whose traffic you want to sniff.  The first result is usually the WiFi router, the results below that are connected users (known as targets or victims) on the network.  In the picture there is only one user on the network, a computer with the name ‘ANA’

• Then head over to the settings tab which is the cog symbol.  There are a number of options here but you can just use the settings shown in the picture to get started.  You may want to save the sniffed traffic to your SD card instead of the phone’s internal memory.

• Then click on the black and yellow radiation symbol and hit the play button to start  arp poisoning and capturing data sent over the network.  You will see some information here but not everything.

• Cookies tab.  This feature is really interesting as you can see which websites have been visited. If you click on one you can actually view and navigate the webpage the user is viewing, sometimes inside their accounts.  Here you can see the user has visited this site and www.lrb.co.uk

• Back to the radiation symbol tab, you can also see what the users are doing on the network and if they visit a site you can view usernames and passwords.
• So you can see a user visited the website www.lrb.co.uk, their username and password.
• There does seem to be a small glitch where it won’t show the ‘@’ symbol, it replaces it with ‘ 40’ so you just have to replace ‘ 40’ with the @ symbol.  The email address entered was ‘test@yahoo.com’ but is displayed as ‘test 40yahoo.com’
• As lots of people use the same password and username for all their online accounts there is a good chance that their other accounts can be accessed with this information.
• This will work on any site that only uses http
• So always be careful when using free or public WiFi.

Now there are two other tabs, the shark fin and the image tabs.

• The image tab actually shows you the images that show up on the victim’s computer, it is pretty slow to load and won’t show you every image.
• The shark fin tab is a packet sniffer and is for more advanced users.  If you are familiar with Firesheep or Wireshark then you will know what it can do.  Data can be saved to a .pcap file.

Download this powerful Android Sniffer here .

This app will only work on rooted devices.

ShareMe - free Wifi Sniffer Ubuntu download

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Wifi sniffer

I know that WEP traffic can be "sniffed" by any user of the WIFI.

I know that WPA/WPA2 traffic is encrypted using a different link key for each user, so they can't sniff traffic. unless they capture the initial handshake. If you are using a PSK (preshared key) schema, then you recover the link key trivially from this initial handshake.

If you don't know the PSK, you can capture the handshake and try to crack the PSK by bruteforce offline.

Is my understanding correct so far?.

I know that WPA2 has AES mode and can use "secure" tokens like X.509 certificates and such, and it is said to be secure against sniffing because capturing the handshake doesn't help you.

So, is WPA2+AES secure (so far) against sniffing, and how it actually works. That is, how is the (random) link key negociated. When using X.509 certificates or a (private and personal) passphrase.

Do WPA/WPA2 have other sniffer-secure modes beside WPA2+AES?

How is broadcast traffic managed to be received by all the WIFI users, if each has a different link key?.

Wifi sniffer

If you installed Debian using this article. or some other method then you can use many more Linux tools. Once you get the traffic you want going through your phone you can install and run any Debian app you want. I will cover two.

In the above screenshot you can see dsniff capturing my username (root) and password (secret) when I logged into my router at 192.168.1.1 (I changed my password since then)

Ettercap is quite a bit more advanced that dsniff, and I will not teach you how to use it in this guide, you can learn more here .

The -C option starts it in the TUI mode. (Text user interface). Ettercap can do everything dnsiff can, plus more, it was built for man-in-the-middle attacks, much like the one we are doing here with android.

Now that more and more people are getting smart-phones, this type of attack is becoming easier to pull off. And with everybody’s wireless devices always looking to connect to the global “linksys” or “NETGEAR” this becomes very practical. Anything that goes unencrypted over the air-waves could potentially be seen by others, even the inconspicuous guy in the corner plating on his phone ??

And in case this was not obvious form the start, DON’T BE AN IDIOT. This article was written for information purposes, anything stupid you may do with this information is your own doing not mine.

Recently there has been an explosion of ARP mitm attack type programs for android (all require root) Some good ones are:

Wi-Fi Sniffer App Руководство

я пишу Wi-Fi/sniffer в .Net быть использована и в качестве самостоятельного развертывания инструмент, с USB-stick. Намерение заключается в том, что она будет сканировать для необеспеченных доступных сетей и попробуйте подключиться к каждому из них, в свою очередь, и detmerine ли логин / или прокси-ли directo подключение к моей произвольный веб-сайту. Это выстроить роуминг список " горячих точек " (и их долгосрочной доступности) для базы данных я планирую для заполнения.

намерение распространить этот инструмент, чтобы друзья и друзья друзей, чтобы построить местную карту моего уголок для публикации на web. Я все еще не уверены, будет ли это нарушением законодательства (читая информацию о том, что сейчас) или любое долгосрочное значение.

Это, скорее, любимый проект, чтобы узнать, Wi-Fi кодирования tech, чем все остальное, но также, чтобы помочь моим товарищам, которые имеют IPod/PSP и т.д.

Мой queestion: Что лучше SDK для этого, имея в виду, мне нужна функциональность GPS слишком - Mobile Devices SDK лучше всего использовать?