ALFA AWUS1900 Kali Linux Experience

Hi… at this time, I would write regarding a beast wifi adaptor AWUS1900 as seen below

P_20180915_112313

Looking at the specification of this wifi adaptor, You might be surprised to its capabilities here are some

awu1

awu2

I use this wifi adapter in order to do My research on wifi hacking. I have another wifi adaptor TP-LINK TL-WN722N which is quite good for wifi hacking but not as strong as AWUS1900.

Making this beast run in kali linux requires a bit effort which need to install manually the driver. Unfortunately, if You do not install the correct driver then the packet injection will not run since the begining. Here are the easy steps to install it

1 apt-get update && apt-get upgrade
2 apt-get dist-upgrade
 
root@kali:~#uname -ar
Linux kali 4.14.0-kali3-amd64 #1 SMP Debian 4.14.12-2kali1 (2018-01-08) x86_64 GNU/Linux

Yes you need to reboot after the full upgrade, Just to ensure all the modules updated reload perfectly.

After You get back into your kali then you need to install driver for realtek chipset RTL8814U

  apt install realtek-rtl88xxau-dkms

That is it all the required step needed.

But sometimes, the above steps just do not work directly, if You face this situation then You have another choice is by installing the driver manually as show below

apt install dkms &&
apt-get install bc &&
apt-get install build-essential && 
apt-get install linux-headers-$(uname -r)
git clone https://github.com/aircrack-ng/rtl8812au

in the git directory You will find dkms installation script, You can just execute this script then everything will work fine.

reference
https://github.com/astsam/rtl8812au
https://github.com/aircrack-ng/rtl8812au

During the penetration testing, sometimes you need to upgrade the tx-power (Transmit Power) from its standard 20 dBm (0.1 watt) to some higher values to improve the packet injection. I used to improve the tx-prower to 32 dBm (1,6 watt). Here is the way I increase the tx-power

$ sudo iwconfig wlan0 txpower 30
or
$ sudo iw wlan0 set txpower fixed 3000

as the result just like below, see wlan1 interface. But becarefull of this action, since by increasing the tx-power to the non standard, You may break the local goverment regulation and also for long duration usage, it may break your adapter because of over heating.

P_20180915_130715

Lets check the performance which is packet injection, please check image below. The result is amazing that above 80% for almost all the wifi.

P_20180915_130347

 

Let start the new journey with this new beast.

5 comments

  1. Thanks for the great article.

    I bought one my self but mine is giving pretty bad results compared to the legendary alfa 1 antenna adapters..

    Side by side my AWUS1900 see less networks in total + the AWUS1900 is also seeing 5g networks = AWUS1900 see maybe 50% less 4g networks than AWUS036NHa and AWUS036NH?

    AWUS1900 sees 50% less 4g networks, but got 3 more antennas also 5 dBm?

    And even worse my AWUS1900 barely see any clients! Like 25% maybe off what the 4g alfa adapters see of clients – on the same networks.

    So I did a test, only 1 antenna at a time on the AWUS1900. And found out the left, side one only sees 2 5g networks, the left, mid antenna see like 15 networks 4g and 5g. The mid, right antenna sees like 5 networks – 4x 4g and 1x 5g. And the right, side antenna sees like 4-5 only 5g networks.

    Conclusion: So if I only mount the 1 antenna on the Mid, left spot, it sees the same amount of networks as the 3 other antennas together! LOL!…..but but it barely see any clients even with all 4 on.

    Another fun detail is my own 4g network is at 13 dBm on all 3 antenna spots, unless I mount the antenna on the mid, left antenna spot. Then it spikes from 13 dBm to 45 dBm!

    Clearly something is wrong with my adapter or the software.

    I think it is the adapter because even when I bought it from a legit Alfa approved reselelr on ebay, the LED light was defect from day 1. Gladly I wrote Amazon instantly and told them + told them I suspect it it defect and not just the LED alone.

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