I Made a Wifi Cracking Van

Linus Tech Tips
23 Mar 202414:22

Summary

TLDRThe video script discusses the importance of Wi-Fi security and the risks associated with weak passwords. It highlights how easily default or predictable passwords can be cracked using tools like the cenator password stealer. The video also explores the evolution of Wi-Fi security from WEP to WPA 2 and WPA 3, explaining their vulnerabilities and the methods hackers use to exploit them. It concludes with practical advice on creating strong passwords and setting up separate networks for different types of devices to enhance overall network security.

Takeaways

  • 🔒 Many people still use default or easily guessable Wi-Fi passwords, posing a significant security risk.
  • 🚀 A dedicated password-cracking device, like the cenator, can crack simple passwords in seconds, potentially allowing unauthorized access to network resources and illegal activities traced back to the network owner.
  • 🛠 Wi-Fi security has evolved from WEP to WPA 2 and now WPA 3, with each generation improving upon the security flaws of its predecessor.
  • 🔄 WPA 2 introduced a four-part handshake process to secure connections, making it more difficult for attackers to intercept and crack passwords.
  • 💡 Hackers can exploit weaknesses in WPA 3 by targeting devices that don't support it, forcing the router to fall back to WPA 2.
  • 📈 Modern hardware, such as GPUs with thousands of cores, can significantly speed up the password-cracking process.
  • 🔑 Despite the availability of strong password options, people often choose predictable passwords that can be cracked using dictionary attacks.
  • 🛑 Isolating less secure devices on a separate network or guest SSID can help maintain overall network security.
  • 🌐 Routers often have the option to limit networks to WPA 3 only, enhancing security but potentially excluding older devices.
  • 🔧 Network segmentation, such as creating separate networks for IoT devices and guests, can greatly improve home network security without additional hardware costs.
  • 📚 Education on network security and using tools like VLANs can further secure home networks beyond just strong Wi-Fi passwords.

Q & A

  • What is the major security issue with using default Wi-Fi passwords or personal information?

    -Using default passwords or personal information such as phone numbers as Wi-Fi passwords is a significant security problem because they are easily guessable or crackable, potentially giving unauthorized access to the network and allowing for illegal activities that can be traced back to the network owner.

  • How quickly can a determined hacker crack a Wi-Fi password using advanced tools?

    -With the right tools, such as a password cracking machine referred to as a 'cenator,' a hacker can crack a Wi-Fi password in seconds, granting them access to shared resources, data usage, and potentially enabling illegal activities.

  • What was the first generation of Wi-Fi password protection and why was it inadequate?

    -The first generation of Wi-Fi password protection was WEP (Wired Equivalent Privacy). It was inadequate because it could be cracked in under a minute using a straightforward attack method that involved intercepting packets and comparing them to find the common password.

  • What is the WPA 2 handshake process and how does it improve security over WEP?

    -The WPA 2 (Wi-Fi Protected Access) handshake process involves four steps: the device requests a connection, the router sends a challenge key, the device mixes the challenge key with the password and returns it, and finally, the router sends a session key for the device to use while connected. This process improves security by eliminating the constant transmission of the password, making it much harder for an observer to crack the password.

  • How do modern password cracking methods bypass the WPA 2 security protocol?

    -Modern password cracking methods can bypass WPA 2 by stealing the complete handshake packet, which contains the challenge key and the result of mixing it with the password. This information can then be taken to a safe location and brute-forced with powerful hardware, allowing hackers to crack the password without detection.

  • What is the significance of having multiple cores in a processor for password cracking?

    -Multiple cores in a processor allow for parallel processing, which means each core can attempt to crack a different password simultaneously. This drastically speeds up the process, with a single RTX 490 being able to attempt over 2 million WPA2 passwords per second.

  • What are the key features of the Kamino Grand RM server mentioned in the script?

    -The Kamino Grand RM server features 16,000 CUDA cores, six of which are used in the setup. It has proper server-grade power supplies, a custom PCB for high power connectors, impressive water cooling with a large manifold and散热噚, and custom water blocks for the CPU and GPUs. It also has 32 GB of RAM and a 256 GB SSD.

  • What is the main vulnerability of WPA 3 encryption that persists?

    -The main vulnerability of WPA 3 is that if a network contains any devices that do not support WPA 3 or were made before it, the router will fall back to WPA2 for that device, potentially weakening the overall network security.

  • How can a hacker exploit common human behavior to crack passwords more efficiently?

    -Hackers can exploit the predictability of human behavior by using dictionary attacks or lists of common words and phrases, which drastically reduce the number of passwords they need to attempt. People often choose passwords that are easy to remember or based on popular culture, making them susceptible to such attacks.

  • What is a recommended strategy for securing a home network with multiple types of devices?

    -A recommended strategy is to create separate networks for different types of devices. For example, having a main network for personal devices, a separate network for IoT devices with stricter access rules, and a limited guest network for visitors. This can significantly improve network security without requiring additional hardware.

  • How can using a password generator and QR codes improve Wi-Fi security?

    -Using a password generator to create a long string of truly random characters and then sharing Wi-Fi credentials via QR codes can enhance security. This method is both secure and user-friendly in most scenarios, though it may not be practical for devices without a camera or for those who do not want to allow such devices on the network.

Outlines

00:00

🔒 Wi-Fi Security and Password Cracking

This paragraph discusses the importance of Wi-Fi security and the risks associated with weak passwords. It highlights how many people still use default or easily guessable passwords, which can lead to severe security problems. The speaker introduces a tool called the cenator, password steel Metron AKA 'this van', which can crack such passwords in seconds, potentially giving unauthorized access to shared network resources and enabling illegal activities that could be traced back to the network owner. The video also touches on the historical lack of Wi-Fi security and the evolution from WEP to WPA 2 and now WPA 3 encryption standards.

05:02

💻 Server Hardware and Wi-Fi 6E Security

The speaker examines a new server with improved power supplies and a custom PCB for high power connectors. They discuss the server's impressive water cooling system, the custom water blocks for the CPU and GPUs, and the server's specifications, including 32 GB of RAM and a large radiator for heat dissipation. The paragraph also mentions the server's Wi-Fi capabilities, including Wi-Fi 6E and WPA3 for enhanced security. However, it points out a potential vulnerability in WPA 3 where routers may revert to WPA 2 for devices that do not support the newer standard.

10:03

🔑 Strategies for Strong Wi-Fi Passwords

This section explores the challenges of creating strong Wi-Fi passwords and the predictability of human behavior when it comes to password selection. It explains how dictionary attacks and lists of common phrases can be used by hackers to crack passwords quickly. The speaker suggests using a password generator for truly random character strings and recommends isolating less secure devices on a separate network or guest SSID. The paragraph also discusses the benefits of VLANs and the potential for having multiple networks for different types of devices to enhance overall network security.

Mindmap

Keywords

💡Wi-Fi password security

Wi-Fi password security refers to the measures taken to protect wireless networks from unauthorized access. In the video, it is emphasized as a crucial aspect of home network security, with many people still using weak or default passwords, making their networks vulnerable to hacking. The video discusses the evolution of Wi-Fi security protocols from WEP to WPA2 and WPA3, highlighting the importance of using strong, unique passwords to prevent unauthorized access and potential misuse of the network.

💡Default password

A default password is a preset password that comes with a device, which is often easily guessable and can be a major security vulnerability if not changed. In the context of the video, it is noted that a shocking number of people still use default passwords for their Wi-Fi networks, making it simple for hackers to gain unauthorized access.

💡Password cracking

Password cracking is the process of guessing or computing a password by trying possible combinations until the correct one is found. The video explains that with advanced tools like the cenator password steel Metron (the van), hackers can crack passwords in seconds, emphasizing the ease with which weak passwords can be compromised.

💡WEP (Wired Equivalent Privacy)

WEP was an early security protocol for Wi-Fi networks that aimed to provide a level of security comparable to that of wired networks. However, the video points out that WEP was quickly found to be insecure as it could be cracked in under a minute, leading to the development of more secure protocols like WPA2.

💡WPA 2 (Wi-Fi Protected Access 2)

WPA2 is a more secure encryption protocol that replaced WEP and is designed to protect modern Wi-Fi networks. It uses a four-part handshake process to establish a secure connection between devices and the router, making it much more difficult for attackers to intercept and crack the password. However, the video also mentions that WPA2 has its vulnerabilities, especially when devices on the network do not support WPA3.

💡WPA 3 (Wi-Fi Protected Access 3)

WPA3 is the latest Wi-Fi security protocol, offering improved encryption and stronger password protection. It introduces the dragonfly handshake method, which aims to prevent offline password cracking by making the handshake process more difficult to observe. The video suggests that using WPA3 can significantly enhance network security, but it also notes that routers may still fall back to WPA2 if devices on the network do not support the newer protocol.

💡Dictionary attack

A dictionary attack is a method used by hackers to crack passwords by comparing the encrypted password to a list of commonly used passwords. The video explains that people often use predictable passwords, which can be easily cracked using a dictionary attack, as opposed to random strings of characters that would be much more secure.

💡Brute force attack

A brute force attack is a trial-and-error method used to obtain a password by trying all possible combinations of characters until the correct one is found. The video mentions that while this method can be very time-consuming, the power of modern hardware, such as GPUs with thousands of cores, can significantly speed up the process, allowing hackers to attempt millions of passwords per second.

💡Cenator password steel Metron (the van)

The cenator password steel Metron, also referred to as 'the van' in the video, is a hypothetical advanced tool used by hackers to crack Wi-Fi passwords quickly. It symbolizes the capabilities of modern hacking equipment to intercept network handshakes and use powerful computation to crack passwords, highlighting the need for stronger security measures.

💡Kamino RTX 490

The Kamino RTX 490 is a high-performance computing platform mentioned in the video, featuring 16,000 CUDA cores and multiple GPUs. It is used to demonstrate the power of modern hardware in cracking passwords, emphasizing the importance of keeping up with the latest security protocols to protect against such advanced hacking capabilities.

💡Network segmentation

Network segmentation is the practice of dividing a network into smaller parts for better security, management, and performance. In the video, the concept is discussed as a way to improve home network security by creating separate networks for different types of devices, such as IoT devices, main devices, and guest networks, to limit the potential damage from a compromised network segment.

💡Squarespace

Squarespace is a website building platform mentioned as a sponsor in the video. It offers an all-in-one solution for creating and managing websites, including marketing features, templates, e-commerce tools, and analytics. The platform is highlighted as a user-friendly option for those lacking technical expertise to build a professional online presence.

Highlights

The Wi-Fi password can be displayed on a monitor for easy access.

Many people still use default or easily guessable passwords, leading to significant security risks.

Password cracking can be done swiftly with the right tools, such as the cenator password steel Metron.

Using phone numbers or loved ones' details in passwords is a common but insecure practice.

WEP, the first generation of Wi-Fi password protection, was cracked in under a minute with the right method.

WPA 2 replaced WEP and improved security with a four-part handshake process.

Despite improvements, WPA 2 is still vulnerable to certain hacking techniques.

Hackers can use a collection of exact replicas of the lock (password) to try multiple combinations without detection.

Modern encryption cracking benefits from the parallel processing capabilities of GPUs.

The Kamino RTX 490 has 16,000 CUDA cores, making it highly effective for password cracking.

The new Kamino RTX 490 features custom PCB for high power connectors and improved server-grade components.

WPA 3 introduces the dragonfly handshake method for enhanced security.

Networks with devices not supporting WPA 3 may revert to WPA 2, creating a vulnerability.

Predictable password choices can be significantly reduced using dictionary attacks or lists of common phrases.

Using a password generator with random characters can create secure passwords, but they may be hard to share.

Creating separate networks for different types of devices can greatly improve overall network security.

Using QR codes to share Wi-Fi credentials can be both secure and user-friendly.

Routers can be configured to limit networks to WPA 3 only, enhancing security while maintaining backward compatibility.

Squarespace is an all-in-one platform that simplifies website creation and business growth.

For a detailed guide on improving home network security, separating IoT devices from the main network is recommended.

Transcripts

00:00

hey get over here on the count of three

00:02

your Wi-Fi password is going to appear

00:04

on this monitor ready one two got

00:08

him pretty neat trick huh and sure maybe

00:12

I didn't get it for all of you but a

00:14

shocking number of people are still

00:17

either using the default password that

00:18

came with their device or their phone

00:20

number or a loved one's phone number

00:22

which you may already know is a huge

00:26

security problem how easy is it to crack

00:29

these passwords well with the cenator

00:32

password steel Metron AKA this van I can

00:36

do it in seconds which would give me

00:38

access to any shared resources on your

00:40

network would allow me to use up your

00:42

data limit and would even allow me to

00:44

engage in illegal activities that would

00:47

ultimately be traced back to you I'm

00:49

going to show you how we built it and

00:51

I'm going to give you guys the tools to

00:53

stop people like me and today's video is

00:56

brought to you by apost LT keycaps yes

01:00

they're real and yes you can get them

01:03

right now check them out at the link

01:04

down below where you can get free us

01:06

shipping Wi-Fi security historically has

01:09

been a bit lacking in

01:13

fact I'm working on

01:18

it and if you're thinking that was a

01:21

dramatic reenactment surely it's not

01:23

that bad you're right because it's worse

01:26

than you think whether we get chased off

01:28

or not doesn't even matter we can grab

01:31

everything we need from a target's

01:33

Network in the 30 seconds that it takes

01:35

them to spot us outside their house and

01:38

walk out to confront us so if they're

01:40

using any kind of phone number password

01:43

I should be able to break through

01:45

it this

01:50

easily

01:52

and it's done that was

01:54

it

01:58

yep why let me shock you to learn how

02:01

easy it was to crack that Network's

02:02

password it might also shock you to know

02:05

that for the majority of Wi-Fi's life

02:07

it's kind of been this way we was the

02:11

first generation of Wi-Fi password

02:13

protection to find widespread adoption

02:15

and at first it was good enough

02:17

especially compared to the alternative

02:19

of your data just raw dogging it through

02:21

the air unencrypted but it took

02:24

technology only a few years to advance

02:26

to the point where WEP could be cracked

02:28

in under a minute

02:30

the attack method was pretty

02:32

straightforward every packet of data

02:34

contained the password in some manner so

02:37

if enough packets could be intercepted

02:39

they could all be compared to find out

02:41

what they had in common this was the

02:43

reason for the switch to WPA 2 or Wi-Fi

02:47

protected access which ditched the

02:49

constant sending of the password

02:51

simplifying the process down to a

02:52

four-part handshake first the device

02:56

tells the router it wants to connect

02:58

then the router sends back a challenge

03:00

key the device then mixes the challenge

03:03

key with the password and returns it to

03:05

the router finally the router sends back

03:07

a session key and that gets used for the

03:10

remainder of the time the device is

03:11

connected for an observer then this is

03:14

kind of like having a picture of the

03:16

lock and knowing that a standard looking

03:18

key opens the lock but having no idea

03:21

what the exact shape of that key needs

03:23

to be now they could attempt to brute

03:26

force it but it would take forever and

03:28

they would risk detection because they

03:30

would need to be in range of the lock at

03:31

all times this ended up being pretty

03:34

effective for a while but wait a minute

03:37

what if instead of just knowing what the

03:39

lock looks like the hacker possessed a

03:42

collection of exact replicas of the lock

03:44

allowing them to try a key after key

03:46

after key without detection well that is

03:49

exactly what we did by stealing the

03:53

complete handshake packet we've obtained

03:55

the challenge key and the result of

03:57

mixing it with the password well at that

04:00

point we can take that information to a

04:02

safe location brute force it with the

04:05

power of our cenator and then return to

04:07

do our Shady business making things even

04:10

simpler for Nells encryption cracking

04:13

plays real nice with multiple cores with

04:16

each core of a processor hypothetically

04:18

being able to try a different key in

04:20

unison and this might not mean that much

04:22

for CPUs that have only a handful of

04:24

cores or at most what 128

04:28

192 well when it comes to gpus we are

04:31

talking thousands of cores so while we

04:35

obviously could put Hardware with this

04:37

kind of password cracking capability

04:40

into a mobile hacking station like this

04:43

we don't even need to all right let's

04:45

finally properly meet the kamino grand

04:48

RM now just so you remember the RTX 490

04:52

has

04:53

16,000 Cuda cores in it and this has six

04:57

of those I haven't seen one of these for

04:59

about 2 years every time commo sends

05:02

over a system they are so nice actually

05:05

before I'm even in I can see something

05:07

that is a huge improvement over the last

05:09

one previously they were using sfx L

05:12

power supplies three of them which is

05:15

not the best if you want to have a

05:17

server this time we have proper server

05:19

grade power supplies and there are four

05:21

of them so I am kind of curious if it

05:23

will just keep on running if you take

05:24

one of them out maybe even two of them

05:26

out I have never seen a 490 like this

05:30

this is strange so we have our power

05:32

connectors right here which are uh not

05:36

connected to anything at all cuz Kino

05:37

have put Power connectors on the back of

05:40

these gpus I have seen some pcbs with

05:43

the pads for these power connectors but

05:46

never anything actually installed like

05:48

this it looks like Caminos made their

05:50

own custom PCB for 12vt high power

05:53

connectors right here you can see that

05:55

we have a couple extra and if they

05:57

wanted they could have heaps Absol

05:59

abolute gobs and gobs of gpus in this

06:01

thing I take it this computer's

06:03

extraordinarily loud yes

06:07

very that's loud these run much

06:12

quieter yeah and they also can't run any

06:15

AI workload worth a damn compared to

06:17

this thing they're quiet in the past

06:20

Kino have had their servers set up so

06:22

that you can kind of just put it in like

06:23

your office and it would be fine we'd

06:25

have like noct to a fans set up here

06:27

that blow across the power supplies and

06:30

the radiator at the same time this right

06:32

here is clearly a lot more server grade

06:35

with these absolutely chunk tastic cut

06:37

your finger off fans right here what

06:40

hasn't changed though is how impressive

06:42

their water cooling is in here we have a

06:45

great big water cooling manifold that's

06:48

Distributing in parallel water to our

06:51

CPU and all of our gpus and then is

06:54

taking all of that heat and dumping it

06:56

into this great big radiator with those

06:58

massive fand it looks like all of the

07:01

water blocks are completely custom for

07:03

Camino we've got these beautiful GPU

07:05

ones that are just nice and small just

07:07

look at how beautiful this vrm heat sink

07:09

is over here it's just machined out of

07:11

copper everything in here is just

07:14

absolutely beautiful 32 GB I think the

07:17

last one that we had all of them were 64

07:19

so not too much RAM 256 is still a lot

07:23

though so Tanner have you done

07:24

everything that you need to do with this

07:26

for the video yeah have you tested the

07:28

power supply red

07:30

dundy no should we we can do

07:36

that all right let's see if these power

07:39

supplies are redundant this is a very

07:41

simple test the computer is

07:44

on the computer is still on good job

07:48

guys one thing that isn't very server

07:50

likee with this is the io we have heaps

07:53

of USB ports right here normally on a

07:55

server board you only get like two we

07:57

also have 2 10 gig and Intel ax200 Wi-Fi

08:01

which will get you Wi-Fi 6E and wpa3 for

08:05

that good good high security Wi-Fi ah

08:08

yes while hackers and crackers were

08:10

working to defeat it WPA was doing some

08:13

leveling up of its own and it's a pretty

08:15

safe bet that any Wi-Fi 6 device will be

08:18

using WPA 3 encryption what's changed

08:22

well the new dragonfly handshake method

08:24

aims to make it much more difficult to

08:26

observe the handshake process and crack

08:29

the password offline but along with a

08:31

few smaller vulnerabilities does have

08:34

one major flaw that still persists if

08:37

your network contains any devices that

08:39

were made before WPA 3 or one of the few

08:42

devices made after that that just

08:44

doesn't support it like say for example

08:46

an HP printer your router will fall back

08:50

to WPA2 for that device unless it is

08:53

explicitly told not to that is our entry

08:58

point okay wow thanks lius yeah no

09:01

problem see you later

09:05

buddy let's hope things go a little

09:07

better with victim number two about a

09:09

week ago I gave them an HP printer and

09:13

as long as they didn't get far enough in

09:15

the setup process to realize HP requires

09:17

them to have a subscription just to use

09:18

the ink in the box they're going to have

09:21

that on their network doesn't that come

09:22

with like a trial or something yeah but

09:24

I kept that for myself what I'm going to

09:26

pay for my own printer subscription I'm

09:28

a hacker

09:32

are you done yeah I'm done okay got the

09:34

handshake data let's let's go let's

09:38

go okay this is not going so well and

09:41

that's because even with our stolen lock

09:43

the cracking difficulty of one Wi-Fi

09:45

password compared to the next can be

09:47

dramatically different a traditional

09:50

lock in key might have only five or six

09:53

values that differ and five or six

09:55

possible Heights for the teeth WPA

09:58

passwords by contrast can use any of the

10:00

printable asky characters and be up to

10:02

63 characters long that means that the

10:05

total number of different passwords that

10:07

could exist

10:09

is very high or at least it would be if

10:13

people weren't so gosh darn predictable

10:16

when you are expected to share a

10:18

password with others you are much less

10:20

likely to select one that looks like

10:21

this and you are much more likely to

10:23

select one that looks like this so with

10:26

a dictionary attack or a list of words

10:28

is used instead of random strings of

10:30

characters hackers can drastically

10:32

reduce the number of passwords that they

10:34

need to attempt down from 20 quadr

10:37

gentian apparently yes that is a real

10:40

number to only hundreds of millions

10:43

which might still sound like a lot until

10:45

you consider that a single RTX 490 can

10:48

attempt over 2 million WPA2 passwords

10:52

per second let's tackle a pretty typical

10:54

12 character password then with a number

10:56

and a special

10:58

character

11:00

and yeah armed with only a dictionary of

11:03

a million common words combined with a

11:05

mask of any non-letter asy character I

11:08

can take down your super secure but

11:10

still easy to say password in just

11:14

seconds all right then lonus if full

11:17

sentence passphrases don't work what do

11:20

I do now well you might try creating a

11:22

password with a string of random upper

11:25

and lowercase letters with numbers and

11:27

punctuation which is is actually great

11:30

in theory but unfortunately once again

11:34

people are predictable and they tend to

11:35

do things like use pneumonic phrases for

11:38

easier memorization according to

11:41

researchers at Carnegie melon these

11:43

phrases often tend to be based on

11:44

popular media like Shakespeare or more

11:47

commonly apparently the Oscar Meer

11:49

weener jingle making them susceptible to

11:51

dictionary attacks all the same you

11:54

could use a password generator to create

11:56

a long string of truly random characters

11:59

and then only share your Wi-Fi

12:00

credentials through QR codes this has

12:03

the benefits of being both secure and

12:05

easy to use in most scenarios but it can

12:08

be a huge pain as soon as you need to

12:11

connect a device that doesn't happen to

12:13

have a camera or at least it would be a

12:16

huge pain if you allowed those devices

12:18

on your network at all as it turns out

12:21

you don't really have to if you just

12:22

make a new network for obnoxious devices

12:25

that compromise your security if all

12:27

they need is internet access a really

12:30

great and fairly Noob friendly way to

12:32

deal with this is to put them on your

12:34

router's guest

12:36

SSID if they need more though then you

12:39

might have to learn about vlans network

12:41

security doesn't end at Wi-Fi security

12:44

and Wi-Fi security doesn't end at a

12:46

strong password many routers do include

12:49

an option to limit networks to WPA 3

12:52

only and while this does break backwards

12:55

compatibility with older or less secure

12:57

devices having a second WPA 2 network

13:00

using a different password and with much

13:03

stricter network access rules is a great

13:06

option if you're willing to put in the

13:08

time to learn about it in fact at that

13:11

point why stop at two networks you could

13:13

have one for your main devices one for

13:15

your iot devices and then a limited

13:17

guest Network for your visitors it's a

13:19

great way to really improve your network

13:21

security usually without having to

13:24

purchase any additional Hardware just

13:26

like this is a great way to segue to our

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