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#1 2015-01-17 09:42:36
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
New LF tag, anyone familiar this ?
This is a new LF tag, is none of HID, indala, em. i am trying to decode/clone it. anyone help ? thanks.
proxmark3> lf search
#db# buffer samples: aa 86 66 51 3a 27 1a 0d ...
Reading 20000 samples
Done!
Checking for known tags:
Using Clock: 32 - Invert: 0 - Bits Found: 400
ASK/Manchester decoded bitstream:
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
0110011011000000
1111110011110010
0000000000000000
0000000000000000
Recovered 565 raw bits, expected: 625
worst metric (0=best..7=worst): 8 at pos 16
UID=0000000000000000000000000000000001000100100000000001000001001000 (044801048)
Occurrences: 1 (expected 7)
proxmark3>
https://www.sendspace.com/file/mn7bdd
https://www.sendspace.com/file/h5c5k6
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#2 2015-01-17 15:42:43
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
is there anything printed on the tag? looks like you got 64 repeating bits.
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#3 2015-01-17 16:06:14
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
nevermind - i see this is the same tag we were talking about in http://www.proxmark.org/forum/viewtopic.php?id=2216&p=2. thanks for making a new thread and keeping that thread on topic. 
printed ID: 000066c0
I'm looking at the trace now.
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#4 2015-01-17 16:13:23
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
joe wrote:marshmellow wrote:should be possible. yes just need to program blocks 1 and 2 and set the config block to manchester RF/32 and transmit only 2 blocks. (check the datasheet.)
Thanks, I will try that,
lf t55xx writeblock fcf200000 1
lf t55xx writeblock 000066c0 2
What about block 0 ?Just for your info, the cloned card can't work.
what did you mean by can't work?
what block 0 did you try?
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#5 2015-01-17 16:17:18
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
lf t55xx writeblock fcd200000 1
appears to be a typo.
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#6 2015-01-17 16:38:26
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
Re: New LF tag, anyone familiar this ?
oop.. will try it again... thanks.
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#7 2015-01-17 17:38:55
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
Re: New LF tag, anyone familiar this ?
what value should i write on block 0 ?
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#8 2015-01-17 18:49:05
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
I'm not at my PC, but if you look at the first post in the sticky thread here in lf, you'll find the config block settings for the ata5577. You need a data rate of rf/32 and manchester modulation and you want 2 blocks (64 bits) output. No other settings apply.
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#9 2015-01-18 11:55:09
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
Re: New LF tag, anyone familiar this ?
The cloned card results here. i guess it should work. any idea ?
Checking for known tags:
Using Clock: 64 - Invert: 0 - Bits Found: 312
ASK/Manchester decoded bitstream:
0000000000000000
0000011001101100
0000111111001111
0010000000000000
0000000000000000
0000011001101100
0000111111001111
0010000000000000
0000000000000000
0000011001101100
0000111111001111
0010000000000000
0000000000000000
0000011001101100
0000111111001111
0010000000000000
0000000000000000
0000011001101100
0000111111001111
Recovered 520 raw bits, expected: 625
worst metric (0=best..7=worst): 8 at pos 244
nothing to wait for
Recovered 520 raw bits, expected: 625
worst metric (0=best..7=worst): 8 at pos 244
nothing to wait for
No Known Tags Found!
proxmark3>
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#10 2015-01-18 15:15:38
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
It might work but your clock is wrong
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#11 2015-01-19 06:55:57
- app_o1
- Contributor
- Registered: 2013-06-22
- Posts: 247
Re: New LF tag, anyone familiar this ?
A good way to make sure your Block 0 is correct, do a "data plot" after reading/sampling.
Then compare both traces.
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#12 2015-01-19 07:57:35
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
Re: New LF tag, anyone familiar this ?
look like similar, but not exactly the same.
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#13 2015-01-19 10:27:27
- joe
- Contributor
- Registered: 2013-08-15
- Posts: 126
Re: New LF tag, anyone familiar this ?
Thanks, app_01,
now it looks perfect, the traces are same..
Checking for known tags:
Using Clock: 32 - Invert: 0 - Bits Found: 400
ASK/Manchester decoded bitstream:
0000000000000000
0000000000110011
0110000001111110
0111100100000000
0000000000000000
0000000000110011
0110000001111110
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#14 2015-01-19 16:54:42
- marshmellow
- Contributor
- From: US
- Registered: 2013-06-10
- Posts: 2,302
Re: New LF tag, anyone familiar this ?
congrats!
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