Tag Archives: raspberry pi

Different ways to use TOR

While catching up on SANS’ Internet Storm Center Storm Cast during my drive, I heard this episode. In it Johannes Ullrich was mentioned this article about using DRM Decloaking TOR users. Short version, users running the Tor Browser Bundle click a link, and Microsoft Windows launches the media player not using the TOR network, exposing the user’s real IP address.

This attack could be mitigated by using TAILS or something else that forces all traffic through TOR. Which made me think I should share all the ways I use TOR.

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Why I don’t have a lab

An industry mailing list I’m on recently had a conversation that started asking about Master Degrees but had some hiring managers chip in. They said a question they tend to ask is to have the candidate tell about their home lab.

I’ve been asked this question a few times in the past, and I’ve asked people this question in job interviews. I know it’s to find out what kind of passion the candidate has for the job, but I think it’s starting to become a bad question to ask.

Here is why I don’t have a home lab.

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Rough Outline for Circle City Con

Just so people have an idea of what the class is going to cover:

1. Basic theory of electromagnetic radiation known as radio waves
2. Install SDR# software and configure Dongle on Windows to monitor broadcasts (FM radio, Ham Radio, Other bands).
3. ADBS (Track airplanes, basically how FlightAware does it, with remote sensors people run)
4. Frequency counting (finding what Freqs are popular in an area to do more of item 2).
5. Radio Directional Finding, using RTL-SDR dongles on a Raspberry Pi with a touchscreen and gui software.
5a. (for licensed HAMS) how to turn the Raspberry Pi in to a broadcasting radio

RTL-SDR for Circle City Con

Remember I said you only need 1 of these. These are how they came from Amazon (where I got them all), see last post for links.

RTL-SDR.com: Again I like this because it’s a metal case and came with 2 antenna.








The NooElec in the aluminum case. This is a bare USB stick put in to the block. The picture on Amazon is blue, but what I got was black with silver lettering (I like that look).





The Blue NooElec, like the one in the block case, it comes with a telescoping antenna.






Lastly the NooElec cheap option, with the stick antenna, that doesn’t collapse.

Parts list for Circle City Con’s SDR talk

I’ll be teaching an Introductory class at Circle City Con this year, on Software Defined Radio.

Introduction to Software Defined Radio with the RTL-SDR on Windows and the Raspberry Pi 2

4-hour introduction to Software Defined Radio, using the RTL2832U chipset, covering both Microsoft Windows and the Raspberry Pi. We will be going over how to track airplanes, scan radio frequencies to find people talking, and covering a little radio theory. Covering RTL-SDR due to the cost of equipment. A list can be provided to students prior to the course.

Here is the part list you’ll need if you’re taking the class (Note the links got to RTL-SDR.com, Amazon, or Ada Fruit, and I am not associated with either of them). If you can get parts elsewhere that is fine :

All the RTL-SDR dong’es with antennas I’ve gotten so far have had magnetic mounts, and you need a ground plane for them to work right.

Raspberry Pi WPA_Supplicant setup taking way longer than it should

—- TL/DR —-
If you want to connect a raspberry pi to a hidden access point your wpa_supplicant.conf needs to have the following in the network statement.

Don’t put a ” or a ) in your ASCII PSK it causes problems. I couldn’t get it to work with the hex psk using wpa_passphrase but I broke the rules of troubleshooting making multiple changes at a time instead of one and resetting it.

—– End TL/DR —-

I got a new phone. Nexus 5x.  But this isn’t what this post is about. My SO got a new phone last August. It was an unplanned by after the last one went for a porta-john swim. Again. not what this is about.

A co-worker suggested setting up a NAS to back up the pictures to. Being a poor college student, yes still grad school isn’t cheap, that really isn’t an option. Then he said well if it’s just the phones, why not use one of your Raspberry Pis?

The problem is getting the wpa_suplicant.conf file talking. It has taken me 2 days. Mainly because I don’t mess with that file much.

it hated my passphrase because of the ” and the ) in the middle example:

I tried wpa_passphrase with the file, but it didn’t like that either. (although I kind of want to go back and test it again, in case I missed something.

Which I couldn’t find out until after I set the AP to broadcast. So after more digging I found that

scan_ssid=1 has to be in the config.

Sigh. This is taking way longer than need be, and I’d just wire it, but it’s going to not be near the cables, because of power.

New and Improved WiFi Intrusion Detection System. Pi 2.

So my last post I was fighting the Raspberry Pi 2, with Kali Linux 2.0.1, when it came to starting kistmet_drone on boot. Ian had a work around, but it wasn’t what I wanted. I wanted the built in tools to do their job. Well it turns out it’s a SystemD problem. I spent probably about 12 hours bashing my head against it, making changes and trying things.

Finally, I got smart with my Google searching, and found a slightly better way, but still didn’t want to call an external shell script. Then I spent time smacking my head on the desk. SSHD works, and starts by systemd, why not look at it’s config. Seriously the better you are at something, the less you think of the simple answers that made you good to start with.

2 new lines. One made SystemD wait until after networking was up. The second was a strange sshd -D option. man ssh. Oh doesn’t run ssh as a daemon…

remove –daemonize from Kismet… It worked.



Now to get everything ready before I leave for GrrCon in 17 hours, I’ll be presenting Saturday last I heard.

More on moving WIDS to the Raspberry Pi 2.

So I’m using the Raspberry Pi 2 and Kali 2 for this project so far. As I said last time, I had to expand the image to use the full disk. I have a script for that now. I was actually trying to script the whole deployment. These scrips can be found on my WIDS github repository. But fair warning they are still a work in process.

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Moving WIDs to Raspi2.

So I tried to do this back in July but got sick. My next talk is at A2Y.asm on Sept 12, and rebuilding all the Pi2 again with Kali 2.0.1. I have litteraly spent most of the day trying to expand the root directory.

There is a tool called rpi-wiggle, that sounded really cool, but it hasn’t been updated in 3 years. It also didn’t work for the pi2 running Kali 2.0.1. After lots of searching, I found a forum post saying talking about it.

After running apt-get install triggerhappy lau5.1 (from Kali repos) and getting the Debian raspi-config file from Debian. It says it worked. I’m waiting for the reboot to know for sure.

And it worked. from console it says it has full space.

Now if I was making anything other than a drone, I’d run apt-get install kali-linux-full to get the whole Kali experience instead of the light version. But I’m making a drone. So here is what needs to be worked on before I start making images:

  • install: Kismet, NTP.
  • boot to cli instead of gui
  • change the root password
  • configure kismet
  • Clone
  • configure static ip, and daemon mode.

normally I’d disable ipv6, still might. but the ipv4 and ipv6 stacks are working well together right now. In the past they haven’t.

Updating talk

For Bsides, as mentioned earlier, I’m making some changes for the talk.

For Bsides Detroit I’m swapping out the original Raspberry Pi B devices from the project for the Raspberry Pi 2 B.

The first time I did this, with the RPi-B, I made one image got it working and then cloned it to the others. It caused minor problems with the wireless card naming. I also still had to touch them all to change names, static ip addresses, and the kismet configs.

This week there was a new version of Kali out for the Raspberry Pi 2 when I checked. So I downloaded it, patched it and installed the software. Then created the clone image.

I am going to have to touch each one anyway so figure I will just get the one image with the software, and then load each one and configure it.