IMSI Anyone?
lainchan / diy

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Anonymous · 2015-08-26 22:49

So, I originally had this in /tech/ but decided to move it because,
well, that was a rather stupid place to have it.

I was thinking if anyone was interested in RF/Radio enough to want to
build an IMSI catcher? Or rather work on on the specs for an "open
source" one, mainly for fun.

One could just take a hackRF or bladeRF hook it up to an amp and a
nice antenna and have some awesome software poke at the GMS stack, but
that is old hat. So my main proposal is to attempt to build up
everything into a self contained unit. Integrated RF amp and
everything. Something like a 4U rack case or a Pelican 1670, nice a
portable, just attach power and antenna and go.

The feasibility of this is fairly certain, it just depends on who
wants to join in and help. I think it could be a cool project that
involves a wide array of skills from /diy/, any thoughts?

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Anonymous · 2015-08-27 03:00

Hi, I'm kind of new to the radio thing.  Is this anything like a radio
telescope?

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Anonymous · 2015-08-27 11:45

>>1061
In some ways yes, for a radio telescope all you really need is a
receiver, like the RTL-SDR and an antenna that is designed for the
frequencies you want.

The RTL-SDR you can snag for $30 but it is limited to 24MHz to
1766MHz. That should be enough for any general radio telescope.

The 24MHz to 1766MHz should give you a fair range for the telescope
but you would be missing out on anything larger than ~12m and anything
smaller than ~17cm.

The next issue is the antenna, but I'll leave that up to you.

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Anonymous · 2015-08-27 11:57

>>1061
Amendment to >>1062

If you want to know how I got the wavelength from the frequency.

Just λ = c/v, so
λ = 2.998×10^8 m/s / 1.766×10^9 Hz
λ = 0.16976 m

Therefore λ ~= 17cm

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Anonymous · 2015-08-27 14:10

>DEF CON 18 - Chris Paget - Practical Cellphone Spying

https://www.youtube.com/watch?v=fQSu9cBaojc

but he spent ~1500 US$

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Anonymous · 2015-08-27 14:17

>>1064
Yeah I saw that, but I want to go a step further, like have a "market-
ready" type thing and not just some initial hack, although I was quite
impressed with what he did.

We want to beat the NSA at it's own game, hehe.

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Anonymous · 2015-09-26 09:02

I'd be down to help out with that. Anything programming related that
is.

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Anonymous · 2015-09-26 13:19

>>1175
I myself can do that as well, I think when it comes to this project we
have plenty of software people, but the hardware aspect is the pain in
the but.

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Anonymous · 2015-12-04 07:49

>>1063
ty for the maths