ESP to Wireshark

Everyone’s favorite packet sniffing tool, Wireshark, has been around for almost two decades now. It’s one of the most popular network analysis tools available, partially due to it being free and open source. Its popularity guaranteed that it would eventually be paired with the ESP32/8266, the rising star of the wireless hardware world, and [spacehuhn] has finally brought these two tools together to sniff WiFi packets.

The library that [spacehuhn] created uses the ESP chip to save Pcap files (the default Wireshark filetype) onto an SD card or send the data over a serial connection. The program runs once every 30 seconds, creating a new Pcap file each time. There are many example scripts for the various hardware you might be using, and since this is written for the ESP platform it’s also Arduino compatible. [spacehuhn] has written this as a proof-of-concept, so there are some rough edges still, but this looks very promising as a network analysis tool.

[spacehuhn] is no stranger to wireless networks, either. His YouTube channel is full of interesting videos of him exploring various exploits and testing other pieces of hardware. He’s also been featured here before for using an ESP8266 as a WiFi jammer.

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Cheap Smarthome Gadget(s) Hacked into Zigbee Sniffer

French hacker [akila] is building up a home automation system. In particular, he’s been working with the “SmartHome” series of gadgets made by Chinese smartphone giant, Xiaomi. First, he started off by reverse-engineering their very nicely made temperature and humidity sensor. (Original in French, hit the translate button in the lower right.) With that under his belt, he opened up the PIR motion sensor unit to discover that it has the same debugging pinouts and the same processor. Almost too easy.

For a challenge, [akila] decided it was time to implement something useful in one of these gadgets: a ZigBee sniffer so that he can tell what’s going on in the rest of his home network. He built a USB/serial programming cable to work with the NXP JN5169’s bootloader, downloaded the SDK, and rolled up his sleeves to get to work.

While trolling through the SDK, he found some interesting firmware called “JennicSniffer”. Well, that was easy. There’s a demo version of a protocol analyzer that he used. It would be cool to get this working with Wireshark, but that’s a project for another day. [Akila] got far enough with the demo analyzer to discover that the packets sent by the various devices in the home network are encrypted. That’s good news for the security-conscious out there and stands as the next open item on [akila]’s to-do list.

We don’t see as many ZigBee hacks as we’d expect, but they’ve definitely got a solid niche in home automation because of commercial offerings like Philips Hue and Wink. And of course, there’s the XBee line of wireless communications modules. We just wrote up a ZigBee hack that aims to work with the Hue system, though, so maybe times are changing?

USB sniffing with the BeagleBoard-xM

[Matlo] wrote in to share his USB sniffing project using the BeagleBoard-xM. It builds on the Google Summer of Code project from 2010 that used the non-xM version of the hardware to build a pass through USB sniffer. [Matlo] couldn’t get it to work back then, but recently revisited the project. He’s cleaned up some scripts and generally made it a bit easier for others to pull off as well.

The ARM-based BeagleBoard seen above acts as man-in-the-middle. You connect your target USB device to the board and the board to a computer. The board emulates the target device, passing packets in either direction while also logging them. The captured data is in the correct format for display using WireShark, the de facto standard for making sense of captured communication packets.

This is great for figuring out how to use USB devices on non-standard systems, or vice versa.

Garage door… packet sniffer

Some type of logger or sniffer exists for almost every form of electronic communication. Your keystrokes, phone conversations, and wireless networks could all be monitored. In this¬†awesome¬†proof-of-concept project, [James] expanded that array to include garage door openers. After receiving a piece of chain mail which stated that criminals have the technology to record any remote code and play it back, [James] wondered if he could build such a device that would work on at least his opener model. Continue reading “Garage door… packet sniffer”

Black Hat 2009: Powerline and optical keysniffing


The 2009 edition of the Black Hat security conference in Las Vegas has just begun. The first interesting talk we saw was [Andrea Barisani] and [Daniele Bianco]’s Sniff Keystrokes With Lasers/Voltmeters. They presented two methods for Tempest style eavesdropping of keyboards.

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Chumby hacking by Bunnie

[bunnie] is one of the main people behind the Chumby, and even he can’t resist modding the things. He decided to outfit one with a larger LCD – using a stereo microscope to do the really fine pitch work – and a laser cutter to create a custom bezel for the finished piece. The new LCD is still a touchscreen and allows the Chumby to display 640×480 resolution over the stock 320×240. The mod requires a few parts, but the ultimate difficulty is caused by the surface mount connectors. If you’d rather have some software fun, you might want to check out [bunnie]’s Chumby wifi sniffer.