Proxmark3 community

hamdycam

Member

Registered: 2012-03-29

Posts: 7

Identifying frequency of tag.. help :D

Hi!

I have an LF and an HF antenna and a proxmark3 acquired last week in proxmark3.com

I need help to determine frequency of my unknown card

version of firmware:

-> Send
hw version

<- Received
#db# Prox/RFID mark3 RFID instrument
#db# bootrom: svn 486-unclean 2011-08-28 18:52:03
#db# os: svn 486-unclean 2011-08-28 18:52:03
#db# FPGA image built on 2009/12/ 8 at   8: 3:54

//<-(LA1)I connect low antenna frequency->
//<- Without tag ->

-> Send
hw tune

<- Received
# LF antenna: 13.96 V @   125.00 kHz
# LF antenna: 20.01 V @   134.00 kHz
# LF optimal:  24.84 V @   130.43 kHz
# HF antenna:  0.71 V @     13.56 Mhz
# Your HF antenna is unusable.

//<-(LA2)Sending again->
//<- Without tag ->

-> Send
hw tune

<- Received
# LF antenna: 13.83 V @   125.00 kHz
# LF antenna: 20.14 V @   134.00 kHz
# LF optimal:  24.84 V @   130.43 kHz
# HF antenna:  0.77 V @     13.56 Mhz
# Your HF antenna is unusable.

//<-(LB1)I connect low antenna frequency->
//<- With tag in center of spiral ->

-> Send
hw tune

<- Received
# LF antenna: 13.83 V @   125.00 kHz
# LF antenna: 20.14 V @   134.00 kHz
# LF optimal:  24.84 V @   130.43 kHz
# HF antenna:  0.74 V @     13.56 Mhz
# Your HF antenna is unusable.

//<-(LB2)Sending again->
//<- With tag in center of spiral ->

-> Send
hw tune

<- Received
# LF antenna: 13.83 V @   125.00 kHz
# LF antenna: 20.14 V @   134.00 kHz
# LF optimal:  24.84 V @   130.43 kHz
# HF antenna:  0.77 V @     13.56 Mhz
# Your HF antenna is unusable.

The results indicate that the tag is not of low frequency !!!

//<-(HA1)I connect High antenna frequency->
//<- Without tag ->

-> Send
hw tune

<- Received
# LF antenna: 0.00 V @   125.00 kHz
# LF antenna: 0.00 V @   134.00 kHz
# LF optimal:  0.00 V @12000.00 kHz
# HF antenna: 8.99 V @     13.56 Mhz
# Your LF antenna is unusable.

//<-(HA2)Sending again->
//<- Without tag ->

-> Send
hw tune

<- Received
# LF antenna: 0.00 V @   125.00 kHz
# LF antenna: 0.00 V @   134.00 kHz
# LF optimal:  0.00 V @12000.00 kHz
# HF antenna: 8.99 V @     13.56 Mhz
# Your LF antenna is unusable.

//<-(HB1)I connect High antenna frequency->
//<- With tag in center of spiral ->

-> Send
hw tune

<- Received
# LF antenna: 0.00 V @   125.00 kHz
# LF antenna: 0.00 V @   134.00 kHz
# LF optimal:  0.00 V @12000.00 kHz
# HF antenna: 8.57 V @     13.56 Mhz
# Your LF antenna is unusable.

//<-(HB2)Sending again->
//<- With tag in center of spiral ->

-> Send
hw tune

<- Received
# LF antenna: 0.00 V @   125.00 kHz
# LF antenna: 0.00 V @   134.00 kHz
# LF optimal:  0.00 V @12000.00 kHz
# HF antenna: 8.54 V @     13.56 Mhz
# Your LF antenna is unusable.

The results are uncertain... It is a question of a tag of high frequency? I am not sure...

any ideas? Thanks, sorry for my english!!

XEROEFFECT

Contributor

From: Sydney Australia

Registered: 2009-07-20

Posts: 132

Re: Identifying frequency of tag.. help :D

Does the tag have anything which could identify it? Any name on the tag? Maybe if you upload a picture someone will be able to recognize what it is.

hamdycam

Member

Registered: 2012-03-29

Posts: 7

Re: Identifying frequency of tag.. help :D

The tag is contained in a key (coges key, model mikey)

a picture:

   

a picture extra size:               

http://img109.imageshack.us/img109/698/1003298.jpg

I can execute  some command?

Last edited by hamdycam (2012-03-29 15:11:59)

XEROEFFECT

Contributor

From: Sydney Australia

Registered: 2009-07-20

Posts: 132

Re: Identifying frequency of tag.. help :D

hamdycam,

There is nothing on the net regarding the make and model of this tag. The closest I got was Myki which is to do with transport cards in Australia. From the photo, it sure is a HF tag. Im guessing the proxmark3 cant read the card because the tag needs authentication from the reader before it starts communicating. If this tag is used for building access im guessing it is a Mifare DESfire. Depending on the year the tag was made you could narrow this guess down further. What to do from here depends on more expeirienced users knowledge who are probably in hibernation right now. In the meantime its just you and me.

After some more searching I found this WebSite. Now we know it is Mifare and that it has 512 bytes memory capacity so if we do further searching maybe we can limit it down a Mifare Ultralight which fits into this category. (I'm guessing according to the Wiki.) What are your thoughts? I would brute force using "hf mf mifare" command on proxmark3 and see what happens.

Last edited by XEROEFFECT (2012-03-30 09:00:53)

hamdycam

Member

Registered: 2012-03-29

Posts: 7

Re: Identifying frequency of tag.. help :D

thanks for your reply!

hf command does not contain mf mifare...

option hf:

help
14a
14b
15
legic
tune

Curiosity, the lowest value positioning "hf tune" is 6445 mW

Have I to use another software?

Thanks, sorry for my english!!

hamdycam

Member

Registered: 2012-03-29

Posts: 7

Re: Identifying frequency of tag.. help :D

Finally I installed ubuntu

Tag model sri4k. I am dump with command "hf 14b srix4kread" (low response of the tag, my luck is that)

script or command for write? in datasheet cmd read = 08h & address & crc               cmd write=09h & addres & data & crc

thanks

hamdycam

Member

Registered: 2012-03-29

Posts: 7

Re: Identifying frequency of tag.. help :D

Hello! He forgives, but now already about which model treats himself, I have put it in the previous post ... what one is not to implement the command of writing for this type of tag in the proxmark ... can someone do it like?