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#1 2019-05-23 08:47:23

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Unknow Tag - Please help demod

Can someone clever help me with this tag?

Checking for Unknown tags:
         
Possible Auto Correlation of 1152 repeating samples         

Found Sequence Terminator - First one is shown by orange and blue graph markers         

Using Clock:32, Invert:0, Bits Found:513         
ASK/Manchester - Clock: 32 - Decoded bitstream:         
00110100100100010
0011000111100001
0000100100100010
0000000111100001
0011100100100010
0000000111100001
0000100100100010
0011000111100001
0000100100100010
0000000111100001
0011100100100010
0000000111100001
0000100100100010
0011000111100001
0000100100100010
0000000111100001
0011100100100010
0000000111100001
0011100100100010
0000000111100001
0011100100100010
0011000111100001
0000100100100010
0000000111100001
0000100100100010
0011000111100001
0000100100100010
0011000111100001
0000100100100010
0000000111100001
0000100100100010
000001111100001
         

Unknown ASK Modulated and Manchester encoded Tag Found!         

if it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'         
proxmark3> data raw demod ab
unknown modulation entered - see help ('h') for parameter structure

Last edited by NYCity25 (2019-05-25 15:15:43)

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#2 2019-05-23 09:21:09

iceman
Administrator
Registered: 2013-04-25
Posts: 9,537
Website

Re: Unknow Tag - Please help demod

AM / STT / 32,  get the repeating hex.

data print x

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#3 2019-05-23 12:01:11

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: Unknow Tag - Please help demod

Strange card indeed. Don't think I've seen a raw read only have one block of data that repeates. (Or multiple blocks that are identical.)  Is it to a hotel system?

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#4 2019-05-23 13:06:51

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

residential, and the reader has this logo "CEMUX"

Hope this gives you a clue

Last edited by NYCity25 (2019-05-25 15:01:46)

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#5 2019-05-23 13:26:03

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

It might be similar to this card, but its hard to replicate what he did as the pattern are repeated differently

http://www.proxmark.org/forum/viewtopic.php?id=2795

What you guys suggest?

Last edited by NYCity25 (2019-05-23 13:53:15)

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#6 2019-05-23 13:52:09

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

iceman wrote:

AM / STT / 32,  get the repeating hex.

Can you elaborate a bit? do I have to run a command, I'd love to try what you said

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#7 2019-05-23 15:14:22

iceman
Administrator
Registered: 2013-04-25
Posts: 9,537
Website

Re: Unknow Tag - Please help demod

Save a trace and share here on forum.

data save mytrace.pm3

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#8 2019-05-24 04:32:24

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

Here is the trace file

https://ufile.io/r0d27goers

Last edited by NYCity25 (2019-05-25 15:12:55)

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#9 2019-05-25 11:53:55

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

iceman wrote:

AM / STT / 32,  get the repeating hex.

data print x

2488078D334332023092201E13124403C35
2488078D346470F02092201E13124403C35
2488078D3497680F2092201E13124403C35
2488078D349100F02092201

Last edited by NYCity25 (2019-05-25 15:17:19)

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#10 2019-05-25 14:35:01

rogo2u
Contributor
Registered: 2019-05-25
Posts: 2

Re: Unknow Tag - Please help demod

I suggest you send an email to info@rogo4u.com.au
He is the guy looking after the security system for that building in Mascot you are trying to make a copy for.
I am sure he will be more than happy to help you.

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#11 2019-05-25 15:14:07

NYCity25
Contributor
From: Mars
Registered: 2018-08-19
Posts: 31

Re: Unknow Tag - Please help demod

marshmellow wrote:

Strange card indeed. Don't think I've seen a raw read only have one block of data that repeates. (Or multiple blocks that are identical.)  Is it to a hotel system?

thanks, figured it out with help of the sequence modifier

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