InfoSec Adventures
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InfoSec Adventures

Beacon Flooding Attack

This attack scenario concerns the connectivity confusion of a wireless client. We are going to transmit countless fake beacon frames. After some time the available wireless networks are so many that the user is totally confused and lost in a large list of networks.

Steps:

Create a monitoring interface with the following command:

airmon-ng start INTERFACE

You can capture beacon frames in Wireshark with the following filter:

wlan.fc.type_subtype == 0x08

To better target clients, I created a dictionary file with SSID names similar to the surrounding network names (each on separate line):

nano ssid_names.txt

To begin transmitting the beacon frames, I’ll use the mdk3 tool with the b (beacon flooding mode), -a (advertise a WPA2 network), -g (advertise a 54Mbps network) and -f (use the provided dictionary file):

mdk3 MONITOR_INTERFACE b -a -g -f ssid_names.txt

In case, you want to mess around with specific wireless devices, you have the ability to specify the channel number.

mdk3 MONITOR_INTERFACE b -a -g -f ssid_names.txt -c CHANNEL

This is also a Denial of Service type of attack, which means it is active. Wireless intrusion detection and prevention systems are likely to be triggered.

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Mr. Robot

Self-taught developer with an interest in Offensive Security. I regularly play on Vulnhub and Hack The Box.