Slides for talk at Null Chennai Chapter by Chirag Jariwala #cjhackerz

1. Node MCU Esp 8266 based
WiFi
Deauther
By CJHackerz(Chirag Jariwala)
Mail: cjhackerz@outlook.com <81B88EF3>
Twitter: twitter.com/cjhackerz
GitHub: github.com/cjhackerz

2. 2
What is deatuh attack?
● While connection is happening between two devices data frames get
exchanged between them.
● Management frame is one of those data frames,it’s job is to establish
connection and disconnect client.
● In general we use “IEEE 802.11b/g/n” standards for WiFi
communications.Management frames are trasmitted in un-encrypted form
in these standards which are used widely on most of the devices.
● So basically an attacker can easily sniff these frames.What he/she has to
do is send copy of that frame with deauth request in it with spoofed
address of AP station and Mac address of client is injected.
● And attack only has to know mac address of client AP to send frame
which is broadcasted in open air every time.

3. 3
Deauth attack timeline

4. 4
Solution any?
● IEE 802.11w standard implies ecnryption in
management frames in 2009
● Problem is, this standards has poor compatibility
with most of the current wifi devices. To avoid
these issues no other wifi device manufaturer
has shown intrest to bring out product according
to that standard.
● So most of the wirelesss WiFi devices are easily
vulnerable to deauthentication attacks.

5. 5
Deauth vs Jamming
● Deauth is very different from jamming.
● Deauth is like loud speaker in car and Jammers
are like loud speakers in concerts
● Inshort Jamming is done by sending huge
amount of noise in the same frequency inorder
to disrupt communication. Also it requires costly
hardware to generate this kind of very strong
signals

6. 6
Now tell me what the heck are these small
chips?

7. 7
What is Node Mcu and esp 8266?
● The ESP8266 is a low-cost Wi-Fi chip with full TCP/IP stack and MCU (microcontroller unit)
capability produced by Shanghai-based Chinese manufacturer, Espressif Systems.
● And NodeMCU is an open source IoT platform.It includes firmware which runs on the ESP8266
Wi-Fi SoC from Espressif Systems, and hardware
Esp8266 Node MCU

8. 8
Closer look at chip

9. 9
Setting UP!

10. 9
Setting UP!