What is mdk3

mdk3 is a multifunctional program, the main purpose of which is to show the weak points of WiFi networks. The mdk3 utility can use to silence WiFi, deauthenticate clients, confuse wireless network monitors, or confuse intruders who want to attack your wireless network, as well as to perform an attack aimed at lowering the encryption algorithm from WPA to a weaker one or refusing to use encryption. Those. It is clear that the program is very versatile.

The command in the following example tells mdk3 to jump on channels 1, 6 and 11 and turn off all the stations that will be found there. Most stations will try to reconnect, however, the normal exchange of data is no longer possible until the testing is stopped, because immediately after connecting they will be disconnected, mdk3 deauth example:


Mdk3 Tool Download


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Conclusion

If you look closely at the mdk3 documentation , you can see that some modes have not been considered here. Apparently, they either do not work anymore, or I did something wrong during testing. If you have successful tests with other modes, then write about it here in the comments.

While the tools included are interesting, only --deauth is helpful in jamming a Wi-Fi connection. Based on these filter settings, we can use Aireplay-ng to attack specific nodes on specific APs. We can do so with a command like below.

Taking a look at the filter options for MDK3, we can type mdk3 --help d to get the help information for the deauthentication module specifically. Here we can see that it is different from the options for Aireplay-ng. Instead, we have the following options to craft our attack.

A better option for jamming an area is to jam a channel. To know what channel to jam, we can use another tool called Airodump-ng to discover what channel our target is on. With our card in monitor mode as wlan0mon, we can type the following command to see information about all nearby wireless networks.

As a general practice, it is good if you use original sources (author's repositories). The github link you provided isn't the original link. After much googling I couldn't find the original link, the author's web page seems to be down (Here is the web-archive link). I then looked for mdk3 in Kali Linux's repositories (Kali Linux is successor to backtrack). Since Kali Linux is a well known Linux distribution, its repositories can be trusted.

I have uploaded the patch file, and the mdk3 repository to github (So that I can use https:// instead of git:// for cloning, since the port for git protocol is blocked by university firewall). Here is the link. The Makefile in this repository is already patched.

is commrect. the -0 set the tool to send de-auth frames. the 0 after -0 means sends non-stop de-auth frames untill canceled with control + c. so if you have set the correct access point mac with the -a option and the correct Station ( STA ) Mac address witht the -c option, i hope the stage is ready and it should of course work. Hey ! make sure that u have put the right mac addresses for this type of attack. You can double check your Mac address by running the airodump-ng tool, there you can notice the correct stations with the correct Access Points. Some stations MAC addresses will be present there but will be un-associated, on such stations the Attack may not work.I hope this is being infromative............Thanks

There's a wifi network at my school it is really fast. i'm using it for doing my homework and doing exercise.but , some of my friends trying to disconnect my network using a program called mdk3 on linux and netcut on windows.it is really annoying because i can't do my homework and my exercise because of that.

And for the mdk3 there is an indirect solution because it's different from netcut (netcut let you connected but there is no internet) but mkd3 disconnect you from the network so you can install linux via a virtual machine and use a usb wireless adapter or install linux as an operating system to use your computer wifi card ... =>So=> open two terminals in linux one to create new Access Point named "Stop_Jumming_And_I_Will_Stop" and the other to disconnect all the client from all the Accesses Point around you ... do that for 5 minute and the hackers around you will understand the story ... i'm always doing that in my universityand disconnect all of them :) :) so the first command is , 

airmon-ng start wlan0 ; airbase-ng -e Stop_Jumming_And_I_Will_Stop -c 9 -v mon0 

and the next one is 

mdk3 mon0 d

 mon0 is your interface and remember you can use the even if you are not connected to any network

Scroll down to see more options. We can see the various testing modes available in this tool. We will use the deauthentication attack for this Wifi DOS. As the name implies, this attack disconnects all clients connected to the wifi network.

Jamming might not be the most proper term, as it traditionally refers to a device that sends a strong radio signal to overwhelm devices nearby. Countries use these jammers in electronic warfare, and are generally heavily regulated, purpose-built pieces of equipment. Instead, we are exploring tools that take advantage of unencrypted management frames which when used maliciously, deny service to wireless devices. These packets are Deauthentication and Dissassociation packets. Both packets individually can be spammed to disrupt communications though countermeasures exist, so mixing both packets should increase our chances to deny traffic on a network.

This is where MDK3 comes in. This tool comes built in on Kali and can be used to deny wireless traffic to a device by sending both packets at the same time. In order to do this, we will need our Pi with Kali and a wireless adapter from the last post. Next step is to set the adapter into monitor mode, which is done by entering:

This tool will show us the various access points located nearby, as well as the channels they are on. With this we can target a specific channel we wish to jam, and affect all devices connected to that specific access point on the channel. My test network was on channel 6, so jamming that would be done by entering:

This will pull up a list of all the devices on channel 6. We can then copy the addresses and paste them into our list we are making. I made a list using nano called targets.txt . We can add this list to our previous mdk3 command, which should look like:

With this both of my test devices have lost connection to my access point and everything else remains fine. This tool quickly illustrates how wireless networks can be attacked. An attacker could feasibly use this tool to deny traffic on a wireless network at a coffee shop in hopes that users would then look for another AP and connect to their own to start man in the middle attacks. Another possibility would be that a malicious person could disrupt a wireless security camera and then do as they wish.

You can use your mdk3 advance tool to send multiple beacon frames to show the fake AP on the client machine. This is a very dangerous attack for the victim to crash his/her network scanner or major driver also.

You might try going back to a prior, known good (i.e., buildswithout errors or warnings) version of your source code and tryingagain. If the problem does not go away, that would seem to point to aproblem with the tools. However, if the problem goes away, then youcan try putting the changes back, one piece at a time till theproblem shows up again. Then you can try to figure out if the faultlies with your code or the tools. If you're sure it's the tools,contact KEIL tech support, and provide them a test case to show theproblem you're having. They're pretty good at responding to techsupport requests. Giving them a (small as possible) test case makesit much, much easier for them to figure out what's wrong.

Hi Howard:

I'm using version uVision3 v3.51 . The Armcc.exe does not provide anyversion number. The assembler is RVCT 3.0 (build 951). The problem isnot with a particular project. With every project (including the onesthat becomes as examples with the tool) I get the error.

I tried with different hard Disk/Windows in the same machine, theHard Disk in another machine, and even reinstalled the tool in adifferent machine...

I don't know is happening but in all cases (including in a newmachine) I got the same error: "** Segmentation problem"

It would be usefull if you share the tech-support response...

hi, as i still can not bring together cross compiling a package on a standalone host linux pc i ask for another approach.

i red a lot about extroot. just beef up my router with external drive usb pen-drive or ssd (as usb pen-drives so far no have wear leveling implemented i rather would go with an ssd with swap partition).

after the beef up to setup build environment on the router directly and install apps from source natively without generating a mips_24kc.ipk first.

just like on any desktop linux pc.

if such tools / configuration available under LEDE/Openwrt or i have to figure out that nasty cross toolchain work finally?

i just want mdk3, dsniff and ettercap to run (none of them have mips_24kc.ipk available for recent hardware, found packages with mipsel or ar71xx.ipk deny install due to wrong architecture)

thanx drbrain, i began this tour ca. 2 weeks ago, so i'm a complete n00b. those apps i mentioned mdk3, dsniff, ettercap somebody compiled already for different architectures but looks to me they abandoned their projects and nobody maintaining those packages any more in a manner of simple opkg install mip_24kc.ipk form. i found dozens of makefiles tailored for openwrt for the given source file (mdk3-v6.tar.bz2). i have both buildroot openwrt and a "lede-sdk-17.01.4-ar71xx-generic-gcc-5.4.0_musl-1.1.16.Linux-x86_64" installed on my pc running kali linux rolling 2018.2 version. (can be a problem if i'm root user???). i'm struggling a good week already 24/7 to find out how to compile this tar.bz2 to a mips_24kc.ipk. something wrong with my understanding of those wiki pages. i would welcome some step-by-step example with such source file. 17dc91bb1f

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