I Tried Hacking a Bluetooth Speaker - Here's What Happened Next

In this article, we’ll attempt to hack a Bluetooth speaker using my knowledge of CyberSecurity.

Watch the Video

00:00

have you ever been in a social gathering

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maybe a party

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and you're hanging out with your friends

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maybe some colleagues and there's a

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bluetooth speaker in the background

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everything's good except there's one

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issue the music that is being played

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is horrible either doesn't fit the vibe

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or something like that

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so in that moment when you're with your

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friends you wish that you were the one

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who had control of the bluetooth speaker

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the individual in the background or with

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the phone and boom you click play and

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whatever music your heart desires

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it is played

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no matter if the person who has

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connection to speaker is playing

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the music or not you are the one who is

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controlling the speaker so in today's

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video what i want to try doing

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is using my cyber security expert

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hacking skills

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dang it stack overflow we go

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okay maybe not expert hacking skills but

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i'm going to try

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developing a program which allows me to

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hijack the bluetooth speaker session to

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accomplish this task i have

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two sets of equipment the first thing is

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a bluetooth speaker in this case it is a

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flip 4 running bluetooth version 4.2

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the next thing is a raspberry pi 3

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b plus and in this case this has a

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little bluetooth

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adapter which allows me to communicate

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with other bluetooth devices

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with these two devices i'm going to try

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developing a

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method or program which allows me to

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hack in to

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the bluetooth speaker so then all i

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would have to do

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is just you know carry around this big

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old bulky raspberry pi

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and i would be able to hack into

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anyone's bluetooth speaker especially my

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friends

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so with that behind us let's go ahead

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and get started

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[Music]

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my first step was to go ahead and unbox

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the raspberry pi 3b plus that i had

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ordered specifically

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for this project after unboxing that i

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would perform the basic setup

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cool looks like this works now it's time

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to go ahead and set the rest of

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this thing up by working inside here and

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02:03

yeah let's go and do it so after turning

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on the pi i went ahead and followed an

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online

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tutorial which allowed me to get up and

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running with the pi with

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remote ssh connection into the raspberry

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via my windows computer so after that it

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was time to go into

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the research phase so i found this

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article online which i'm going to be

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using a couple of the tools and

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technologies that they recommended that

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i go ahead and do

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so full credit to the author of this uh

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article here so if i scroll down here

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you're going to see

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a list of tools which will allow us to

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work with

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with bluetooth devices i'm going to use

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the same tools

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as recommended within this article and

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i'm going to go ahead and do that

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by first setting up the raspberry pi and

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then from there i'm going to go ahead

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and create a

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python script which is going to use some

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of these open source

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bluetooth hacking tools to get into the

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bluetooth speaker

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to do this what i'm going to go ahead

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and do is write a sketch that

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kind of walks through my thinking

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process about how i think

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about solving this problem and then from

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there we're going to go ahead and try to

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implement this

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through a python script

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[Music]

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my original thought process was to mock

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the scenario mentioned in the article

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so using the raspberry pi i was going to

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insert myself in between the victim and

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bluetooth speaker

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while they were conducting the pairing

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process i was going to use

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the knob attack to lower the entropy bit

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03:32

to one from there i was going to write a

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program to brief force the encryption

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key so i could insert myself in between

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the session in clear text

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as mentioned in the article i was going

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to use an open source tool called bt

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proxy to set up a man in the middle

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relay between the victim and the

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bluetooth speaker

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at this point i could send my music

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files to the bluetooth speaker while the

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victim would have no control of the

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bluetooth speaker alright so i

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am ready to start creating my python

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script

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but before i do that i'm going to go

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ahead and install internal blue and bt

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proxy off of github links in the

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description below

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and yeah so let's go ahead and get

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started with the initial configuration

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[Music]

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process

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while downloading the open source tools

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i had encountered one critical problem

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the bt proxy open source tool was

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outdated the last known update was in

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2015 and the github page specifically

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said that it was discontinued i had

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tried downloading the dependencies of

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this open source tools at different

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versions to make it work but it was all

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not functioning correct i couldn't find

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the correct versions

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so i thought that well at this point i

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can't really do this type of attack

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not only was the open source tool

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outdated but i also realized that

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in between the pairing process between

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the bluetooth speaker

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and the victim i would have to be at the

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right location at the right time

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and oftentimes for people who already

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have bluetooth speakers their phones are

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just automatically connected to the

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bluetooth speaker at this point i

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thought the project

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was over but throughout my process of

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research i did figure out how to connect

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the raspberry pi

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to the bluetooth speaker as well as send

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audio or a music file to the bluetooth

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speaker

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okay so it's the next morning throughout

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my research i did

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find one method that i could use

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to connect to the bluetooth speaker and

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inject my own audio stream

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now it's sort of similar to just

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connecting another phone to a bluetooth

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speaker but it's a little bit different

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sort of so let me just go ahead and show

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you because it force connects

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into my controlled environment what i

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found out is that if i connect the

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raspberry pi to the jbl bluetooth

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speaker i could go ahead and override

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the music session that would be

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currently being streamed from the victim

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phone in this case i could override the

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music and play from

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my raspberry pi as i inject the audio

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stream

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so let me go ahead and show you my

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process connecting

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to the bluetooth speaker using the

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library blue z

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and then injecting an audio stream using

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the pulse audio

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server

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all right so here in front of me i have

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my jbl

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flip 4 speaker it is turned on here as

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you can see from the power button

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and i'm going to go ahead and get into

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my ssh

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session with my raspberry pi 3 plus part

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the blue z packages

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there is a bluetooth command line

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utility called bluetooth

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ctl so if you run bluetooth

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ctl it's going to go ahead and launch an

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interactive

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session here and there are multiple

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commands that we

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can issue so in this case what i'm going

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to go ahead and do

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is try doing scan on this is going to go

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ahead and turn on our scanner

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now i did capture the bluetooth address

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the jbl flip 4 but i had to put that in

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discoverable mode so using the

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discoverable mode method here

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i got the bluetooth address here and

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once i find the bluetooth address for

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instance if we go ahead and just

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click the discoverable here

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that load so once i find

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the bluetooth address i don't have to

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worry about it again i can just go ahead

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and put this

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down here so with that being said i know

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the bluetooth address

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and so i'm going to go ahead and copy

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the bluetooth address here

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do go ahead and select right click and

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i'm gonna go and turn the scan off

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okay all right once that has

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stopped here i can go ahead and try

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connecting to

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the bluetooth speaker so i'm going to go

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ahead and do that

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connect here as you can see

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it has a little doo-doo and it's

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connected

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i have my jbl flip 4

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connected to my phone as well so right

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now i have both the raspberry pi

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and the jbl flip 4 connected to my

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bluetooth phone

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or on through my bluetooth online so at

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this point you can see it has a little

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jbl flip 4 and we can do whatever we

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08:13

in this case we are done connecting to

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the bluetooth speaker so we're going to

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go ahead and do exit

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this point we need to get the sound card

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information so that we can go ahead and

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inject our own stream of music

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now before moving forward what i found

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out was i needed to

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first go ahead and put music onto my pi

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so i went ahead and do that

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i just used the ftp client

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filezilla to transfer a music file from

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my windows computer to the pi pretty

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08:43

and then i if you do ls here you can see

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i have chill

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2.wav that's the sound file i want to

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08:49

now there's a sound driver called pulse

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audio which allows you to

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inject music streams so to do this what

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i went ahead and did is i did p-a-c-t-l

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and then you can go ahead and do list

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cards

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and at this point you're gonna have a

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couple of sound cards uh

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cards zero and one i didn't have to

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worry about so in card 12

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the next card the third card in the

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listing is with the one that

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you would want if you're connected to

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the speaker so at this point what you're

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going to want to go ahead and do

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is select the name of this driver here

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and go ahead and right click to copy

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we're almost done

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at this point we have our music and we

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also have the sound card name

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now we can go ahead and do pa play

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the dash p flag allows us to play and

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then i'm going to go ahead and play on

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specified device and in this case it's

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going to be

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blue z card but in this in this

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we're actually we're going to change the

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blue z card to blue

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z sync and we are also going to append

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that a to dp underscore sync all we need

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to do is

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go ahead and inject the music in there

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so chill

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underscore two dot love

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and as you can see it is playing the

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chill to

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wave music now if i wanted to go ahead

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and stop this

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i could just do control c to interrupt

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the session and boom

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there we go so it's very manual and also

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you know my phone is still connected to

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the speaker

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but it's it's more of a manual type

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process

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and you have to make sure that you know

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you can connect it to

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a speaker such as the jbl flip 4. i'm

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not exactly sure

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how many other speakers would allow this

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to happen

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so there you go that's the attempt at

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trying to hack bluetooth speakers

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it's definitely the method that i

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created was definitely nothing

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revolutionary um but it was

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sort of successful in the attempt to try

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to connect and try to play my own

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music i hope all is well the articles

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and the tools that i use will be in the

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description

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below so for those of you who maybe want

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to replicate

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something like this i can that can maybe

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be something you can do um

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yeah so i hope all is well and until the

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next time have a good day

English (auto-generated)

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