0

I'm learning wireless. The following command works great:

aircrack-ng -w mywordlist <capture file>

If I generate the wordlist on the fly by JTR, for instance, then I need to provide -e :

root@kali:~/spielordner/wifu# john --wordlist=./wordlist.1 --rules=TestTest --stdout | aircrack-ng -w - mycapture 
Please specify an ESSID or BSSID.

When I send the passwords John creates into a file and provide that file to aircrack-ng's -w parameter then I don't need -e. Where's the structural difference between those 2 modes?

1

In most recent versions of Aircrack-ng, when you use the command:
aircrack-ng -w mywordlist <capture file>

You'll be asked to enter the index number of the target network.check this image

Basically, both tools need the SSID to be able to crack the 4-way handshake 'not the point to discuss', but the difference is within the tool.

I believe that Aircrack-ng has some advanced interpreting methods to discover the required bssid or essid from the file, while JTR just asks you to enter it manually.

  • A follow up problem is that when I enter the second command with bssid it complains that one doesn't exist (which it definitely does). But I first wanted to clarify the above point. – kaidentity Sep 20 '16 at 8:10
  • I'm not familiar with JTR to help you with this, but if you have problems with JTR, just use another tools. Crunch for example will help you in same way. – Emadeddin Sep 20 '16 at 8:13
  • JTR is not the problem the error message comes from aircrack-ng... – kaidentity Sep 20 '16 at 8:15
  • Edit your question, update it with some examples. – Emadeddin Sep 20 '16 at 8:18
-1

From www.aircrack-ng.org

The techniques and the approach above do not work for WPA/WPA2 pre-shared keys. The only way to crack these pre-shared keys is via a dictionary attack. This capability is also included in aircrack-ng.

With pre-shared keys, the client and access point establish keying material to be used for their communication at the outset, when the client first associates with the access point. There is a four-way handshake between the client and access point. airodump-ng can capture this four-way handshake. Using input from a provided word list (dictionary), aircrack-ng duplicates the four-way handshake to determine if a particular entry in the word list matches the results the four-way handshake. If it does, then the pre-shared key has been successfully identified.

  • Obviously you have never heard that you can create your own dictionary files which is basically what I'm doing above, in 2 different flavors. What you quote refers to the statistical analysis methods used to crack WEP. They don't work for WPA/WPA2, but this is not the point here... – kaidentity Sep 20 '16 at 6:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.