mirror of
https://github.com/SpacehuhnTech/esp8266_deauther.git
synced 2026-08-02 17:07:36 -07:00
Stefan Kremser
705decc3d3
I'm not a native speaker, if you find more errors please feel free to correnct them! thx.
223 lines
10 KiB
Markdown
223 lines
10 KiB
Markdown
# ESP8266 Deauther
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Deauthentication attack and other hacks using an ESP8266.
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## Contents
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- [Introduction](#introduction)
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- [What it is](#what-it-is)
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- [How it works](#how-it-works)
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- [What an ESP8266 is](#what-an-esp8266-is)
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- [How to protect against it](#how-to-protect-against-it)
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- [Disclaimer](#disclaimer)
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- [Installation](#installation)
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- [Uploading the bin files](#uploading-the-bin-files)
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- [Compiling the source with Arduino](#compiling-the-source-with-arduino)
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- [How to use it](#how-to-use-it)
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- [FAQ](#faq)
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- [License](#license)
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- [Sources and additional links](#sources-and-additional-links)
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## Introduction ##
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### What it is
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Basically it’s a device which performs a [deauth attack](https://en.wikipedia.org/wiki/Wi-Fi_deauthentication_attack).
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You select the clients you want to disconnect from their network and start the attack. As long as the attack is running, the
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selected devices are unable to connect to their network.
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Other attacks also have been implemented, such as beacon or probe request flooding.
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### How it works
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The 802.11 Wi-Fi protocol contains a so called [deauthentication frame](https://mrncciew.com/2014/10/11/802-11-mgmt-deauth-disassociation-frames/). It is used to disconnect clients safely from a wireless
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network.
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Because these management packets are unencrypted, you just need the mac address of the Wi-Fi router and of the client device which you want to disconnect from the network. You don’t need to be in the network or know the password, it’s enough to be in its range.
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### What an ESP8266 is
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The [ESP8266](https://de.wikipedia.org/wiki/ESP8266) is a cheap micro controller with built-in Wi-Fi. It contains a powerfull 160 MHz processor and it can be programmed using [Arduino](https://www.arduino.cc/en/Main/Software).
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You can buy these chips for under $2 from China!
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### How to protect against it
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With [802.11w-2009](https://en.wikipedia.org/wiki/IEEE_802.11w-2009) Wi-Fi got an update to encrypt management frames.
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So make sure your router is up to date and has management frame protection enabled. But note that your client device needs to
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support it too, both ends need to have it enabled!
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The only problem is that most devices don’t use it. I tested it with different Wi-Fi networks and devices, it worked every time! It seems that even newer devices which support frame protection don’t use it by default.
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## Disclaimer
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Use it only for testing purposes on your own devices!
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I don't take any responsibility for what you do with this program.
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Please check the legal regulations in your country before using it. Jamming transmitters are illegal in most countries
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and this device can fall into the same category (even if it’s technically not the same).
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My intention with this project is to draw attention to this issue.
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This attack shows how vulnerable the 802.11 Wi-Fi standard is and that it has to be fixed.
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**A solution is already there, why don’t we use it?**
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## Installation
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The only thing you will need is a computer and an ESP8266.
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I recommend you to buy a USB breakout/developer board, because they have 4Mb flash and are very simple to use.
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It doesn’t matter which board you use, as long as it has an ESP8266 on it.
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You have 2 choices here. Uploading the bin files is easier but not as good for debugging, so keep that in mind in case you want to open an new issue.
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### Uploading the bin files
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**Note:** the 512kb version won't have the full MAC vendor list.
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**0** Download the current release from [here](https://github.com/spacehuhn/esp8266_deauther/releases)
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**1** Upload using the ESP8266 flash tool of your choice. I recommend using the [nodemcu-flasher](https://github.com/nodemcu/nodemcu-flasher). If this doesn't work you can also use the official [esptool](https://github.com/espressif/esptool) from espressif.
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**That's all! :)**
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Make sure you select the right com-port, the right upload size of your ESP8266 and the right bin file.
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### Compiling the source with Arduino
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**0** Download the source code of this project.
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**1** Install [Arduino](https://www.arduino.cc/en/Main/Software) and open it.
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**2** Go to `File` > `Preferences`
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**3** Add `http://arduino.esp8266.com/stable/package_esp8266com_index.json` to the Additional Boards Manager URLs. (source: https://github.com/esp8266/Arduino)
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**4** Go to `Tools` > `Board` > `Boards Manager`
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**5** Type in `esp8266`
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**6** Select version `2.0.0` and click on `Install` (**must be version 2.0.0!**)
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**7** Go to `File` > `Preferences`
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**8** Open the folder path under `More preferences can be edited directly in the file`
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**9** Go to `packages` > `esp8266` > `hardware` > `esp8266` > `2.0.0` > `tools` > `sdk` > `include`
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**10** Open `user_interface.h` with a text editor
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**11** Scroll down and before `#endif` add following lines:
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`typedef void (*freedom_outside_cb_t)(uint8 status);`
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`int Wi-Fi_register_send_pkt_freedom_cb(freedom_outside_cb_t cb);`
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`void Wi-Fi_unregister_send_pkt_freedom_cb(void);`
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`int Wi-Fi_send_pkt_freedom(uint8 *buf, int len, bool sys_seq);`
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**don't forget to save!**
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**12** Go to the SDK_fix folder of this project
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**13** Copy ESP8266Wi-Fi.cpp and ESP8266Wi-Fi.h
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**14** Past these files here `packages` > `esp8266` > `hardware` > `esp8266` > `2.0.0` > `libraries` > `ESP8266Wi-Fi` > `src`
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**15** Open `esp8266_deauther` > `esp8266_deauther.ino` in Arduino
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**16** Select your ESP8266 board at `Tools` > `Board` and the right port at `Tools` > `Port`
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If no port shows up you may have to reinstall the drivers.
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**17** Upload!
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**Note:** If you use a 512kb version of the ESP8266, you need to comment out a part of the mac vendor list in data.h.
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**Your ESP8266 Deauther is now ready!**
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## How to use it
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First start your ESP8266 by giving it power.
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You can use your smartphone if you have a USB OTG cable.
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Scan for Wi-Fi networks and connect to `pwned`. The password is `deauther`.
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Once connected, you can open up your browser and go to `192.168.4.1`.
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You can now scan for networks...
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scan for client devices...
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Note: While scanning the ESP8266 will shut down its access point, so you may have to go to your settings and reconnect to the Wi-Fi network manually.
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...and start different attacks.
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Happy hacking :)
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## FAQ
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**Could it auto-deauth all APs in the range?**
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Yes, but I will not implement this 'feature' for ethical and legal reasons.
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**Can it sniff handshakes?**
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The ESP8266 has a promiscuous mode in which you can sniff packets, but handshake packets are dropped and there is no other way to get them with the functions provided by the SDK.
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Maybe someone will find a way around this barrier.
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**espcomm_sync failed/espcomm_open when uploading**
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The ESP upload tool can't communicate with the chip, make sure the right port is selected!
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You can also try out different USB ports and cables.
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If this doesn't solve it you may have to install USB drivers.
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Which drivers you need depends on the board, most boards use a cp2102 or ch340.
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**AP scan doesn't work**
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There is a reported issue on this: https://github.com/spacehuhn/esp8266_deauther/issues/5
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Try out switching the browser or open the website with another device.
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**Deauth attack won't work**
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If you see 0 pkts/s on the website you've made a mistake. Check if you have followed the the installation steps correctly and that the right SDK installed, it must be version 2.0.0!
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If it can send packets but your target don't loose its connection then the Wi-Fi router uses [802.11w](#how-to-protect-against-it) and it's protected against such attacks or they communicate via 5 GHz Wi-Fi, which the ESP8266 doesn't support.
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###If you have other questions or problems with the ESP8266 you can also check out the official [community forum](http://www.esp8266.com/).
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## License
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This project is licensed under the MIT License - see the [license file](LICENSE) file for details.
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## Sources and additional links
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deauth attack: https://en.wikipedia.org/wiki/Wi-Fi_deauthentication_attack
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deauth frame: https://mrncciew.com/2014/10/11/802-11-mgmt-deauth-disassociation-frames/
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ESP8266:
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* https://de.wikipedia.org/wiki/ESP8266
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* https://espressif.com/en/products/hardware/esp8266ex/overview
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packet injection with ESP8266:
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* http://hackaday.com/2016/01/14/inject-packets-with-an-esp8266/
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* http://bbs.espressif.com/viewtopic.php?f=7&t=1357&p=10205&hilit=Wi-Fi_pkt_freedom#p10205
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* https://github.com/pulkin/esp8266-injection-example
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802.11w-2009: https://en.wikipedia.org/wiki/IEEE_802.11w-2009
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Wi-Fi_send_pkt_freedom function limitations: http://esp32.com/viewtopic.php?f=13&t=586&p=2648&hilit=Wi-Fi_send_pkt_freedom#p2648
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esp32 esp_Wi-Fi_internal function limitations: http://esp32.com/viewtopic.php?f=13&t=586&p=2648&hilit=Wi-Fi_send_pkt_freedom#p2648
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Videos:
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[](https://www.youtube.com/watch?v=oQQhBdCQOTM)
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[](https://www.youtube.com/watch?v=r5aoV5AolNo)
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