Insinuator


Some outright rants from a bunch of infosec practitioners.

TAG | gnuradio

Oct/12

31

Pytacle alpha1 released!

Finally it’s here!

pytacle is a tool inspired by tentacle. It automates the task of sniffing GSM frames of the air, extracting the key exchange, feeding kraken with the key material and finally decode/decrypt the voice data. All You need is a USRP (or similar) to capture the GSM band and a kraken instance with the berlin tables (only about 2TB ;) )

I’ve posted a preview before, take a look at the video to see the tool in action.

The tool is early alpha, so it’s working (for me ;) ), but it’s neither rock stable nor packaged in any way. But still, I’ll be happy to get bug reports.

BTW, talking about Telco security: There will be another TelcoSecDay on 03/12/2013 at next year’s Troopers! We’ve already some quite interesting talks confirmed.

cheers

/daniel

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Dec/11

18

pytacle preview

Hi,

today I’ll give a short preview of my newest tool, pytacle. It is simply a little helper program to control gnuradio/airprobe/kraken/some_other_tools, convert their input/output and to find a use able clear/cipher text combination to break A5/1. In the end it should record, crack and decode/play a gsm phone call with ~5 mouse clicks.

Take a look at this video:

The code is not available yet, as its not finished ;) the recording and cracking part are working, but the decoding doesn’t. I need to put some more time into the code, but there isn’t much spare in that time of the year :D

cheers

/daniel

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