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#1 2018-08-20 01:36:44

NYCity25
Contributor
Registered: 2018-08-19
Posts: 5

Unknown Tag

Hi all,

Does anyone have a clue what kind of tag this could be? Its obviously not a HF tag and it also doesn't respond any LF command,

My guess is this a 134Khz, has anyone seen this?

received_324009778338666.jpg received_253700145262876.jpg

Last edited by NYCity25 (2018-08-21 13:25:12)

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#2 2018-08-20 14:25:35

yukihama
Contributor
Registered: 2018-05-13
Posts: 49

Re: Unknown Tag

NYCity25 wrote:

Hi all,

Does anyone have a clue what kind of tag this could be? Its obviously not a HF tag and it also doesn't respond any LF command,

My guess is this a 134Khz, does anyone seen this?

https://thumb.ibb.co/hrDzOK/received_324009778338666.jpg https://thumb.ibb.co/jdhtiK/received_253700145262876.jpg


honestly speaking, this reader looks like Black Sielox Tag which i am working on these weeks with no progress. Any help with my post?
http://www.proxmark.org/forum/viewtopic.php?id=5858

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#3 2018-08-20 17:04:45

trazodone
Contributor
Registered: 2015-11-25
Posts: 46

Re: Unknown Tag

Hello,

You can try what I did in this post

http://www.proxmark.org/forum/viewtopic.php?id=5806

See last comment

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#4 2018-08-21 13:20:42

NYCity25
Contributor
Registered: 2018-08-19
Posts: 5

Re: Unknown Tag

trazodone wrote:

Hello,

You can try what I did in this post

http://www.proxmark.org/forum/viewtopic.php?id=5806

See last comment

Thank you , However, this tag does not give out anything when I run "lf search u"

Your trick diffenetly works in some cases, I concur

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#5 2018-08-22 03:46:24

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,234

Re: Unknown Tag

to measure the frequency, use hw tune with no tag on it and compare hw tune with a tag on it.  if the voltage drops for one of the antenna's then the tag is pulling power from that frequency.

this is a starting point.

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#6 2018-08-22 03:58:02

NYCity25
Contributor
Registered: 2018-08-19
Posts: 5

Re: Unknown Tag

marshmellow wrote:

to measure the frequency, use hw tune with no tag on it and compare hw tune with a tag on it.  if the voltage drops for one of the antenna's then the tag is pulling power from that frequency.

this is a starting point.

Thanks marshmellow

I swear I tried that, unfortunately, the voltages did not drop at all. I'm wondering if the signal has been too weak,

Anyway, thanks sir

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#7 2018-08-22 04:02:22

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,234

Re: Unknown Tag

i've never run into this tag, but from the 3 holes? it looks like maybe an active tag (battery inside?), if so it may not draw any power from the reader.

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#8 2018-08-22 04:08:46

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,234

Re: Unknown Tag

if it was 134khz and it was a dumb tag (not hitag or other 2 way comm lf chip) then you could read it using

lf config H
lf read
data plot

if there is a wave in the plot then you got it...  do a

data save xxx.pm3

and share the file...

if no wave it may still be a lf chip just one that waits for the right wakeup command or 2 way comm...  and you'd likely have to sacrafice a tag or reader to identify the internal chips.

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#9 2018-08-22 04:10:42

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,234

Re: Unknown Tag

or it may be as @yukihama said and it is a sielox tag (though i thought they drew power off the 13.56 mhz antenna) which is an unknown chip which uses an unknown protocol at this time.  (meaning much time and research is needed)

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#10 2018-08-23 04:06:14

yukihama
Contributor
Registered: 2018-05-13
Posts: 49

Re: Unknown Tag

marshmellow wrote:

or it may be as @yukihama said and it is a sielox tag (though i thought they drew power of the 13.56 mhz antenna) which is an unknown chip which uses an unknown protocol at this time.  (meaning much time and research is needed)

this is a sielox tag because the reader is excat the same as my sielox tag reader. This sielox tag works on HF definitely.

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#11 2018-08-23 04:06:26

NYCity25
Contributor
Registered: 2018-08-19
Posts: 5

Re: Unknown Tag

marshmellow wrote:

i've never run into this tag, but from the 3 holes? it looks like maybe an active tag (battery inside?), if so it may not draw any power from the reader.

thanks, I'll let you know my findings, appreciate it

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#12 2018-09-04 04:10:20

rodrigo
Contributor
Registered: 2018-09-03
Posts: 2

Re: Unknown Tag

i have very similar to you:
NYCity25.png ooodii.jpg

my manager charging very expensive for new key
if can help me to copy this i always very gratefull

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#13 2018-09-04 09:04:03

yukihama
Contributor
Registered: 2018-05-13
Posts: 49

Re: Unknown Tag

rodrigo wrote:

i have very similar to you:
https://preview.ibb.co/gJEeaK/NYCity25.png https://preview.ibb.co/dDuj9e/ooodii.jpg

my manager charging very expensive for new key
if can help me to copy this i always very gratefull


this is a sielox tag because the reader is excat the same as my sielox tag reader. This sielox tag works on HF definitely.

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#14 2018-09-04 09:05:09

yukihama
Contributor
Registered: 2018-05-13
Posts: 49

Re: Unknown Tag

rodrigo wrote:

i have very similar to you:
https://preview.ibb.co/gJEeaK/NYCity25.png https://preview.ibb.co/dDuj9e/ooodii.jpg

my manager charging very expensive for new key
if can help me to copy this i always very gratefull


please show me your tag please!!!

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