Proxmark3 community

Zeushn

Contributor

Registered: 2019-01-10

Posts: 8

hello, LF T55xx chinese unknown card

Sorry to post in here but I'm trying to post in the other sections and can't find the new topic button.

I am trying to decode/clone my chinese office access card.
I have used "lf search" and no results and "lf search u" gives the following result:

proxmark3> lf search u
NOTE: some demods output possible binary
  if it finds something that looks like a tag         
False Positives ARE possible
         

Checking for known tags:
         

No Known Tags Found!
         

Checking for Unknown tags:
         
Possible Auto Correlation of 5248 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:         
1100100101100110
0010110110110001
1110001110000100
1000001100000001
0000011101100011
1001001011010010
0100100010100001
1001001100000000
0110011001100110
1101001001111000
1100100101100110
0010110110110001
1110001110000100
1000001100000001
0000011101100011
1001001011010010
0100100010100001
1001001100000000
0110011001100110
1101001001111000
1100100101100110
0010110110110001
1110001110000100
1000001100000001
0000011101100011
1001001011010010
0100100010100001
1001001100000000
0110011001100110
1101001001111000
1100100101100110
0010110110110001
         

Unknown ASK Modulated and Manchester encoded Tag Found!         

if it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'         

Valid T55xx Chip Found
Try lf t55xx ... commands

then I tried " data rawdemod am" but the results dont seems correct:

data rawdemod am

Using Clock:32, Invert:0, Bits Found:513         
ASK/Manchester - Clock: 32 - Decoded bitstream:         
0110110110001111
0001110000100100
0001100000001000
0011101100011100
1001011010010010
0100010100001100
1001100000000011
0011001100110110
1001001111000177
1001001011001100
0101101101100011
1100011100001001
0000011000000010
0000111011000111
0010010110100100
1001000101000011
0010011000000000
1100110011001101
1010010011110001
7710010010110011
0001011011011000
1111000111000010
0100000110000000
1000001110110001
1100100101101001
0010010001010000
1100100110000000
0011001100110011
0110100100111100
0177100100101100
1100010110110110
0011110001110000

hw version and hw tune output:

hw version
\Prox/RFID mark3 RFID instrument         
bootrom: master/v3.1.0-41-g786ad91-dirty-suspect 2019-01-09 05:07:17
os: master/v3.1.0-41-g786ad91-dirty-suspect 2019-01-09 05:07:38
fpga_lf.bit built for 2s30vq100 on 2015/03/06 at 07:38:04
fpga_hf.bit built for 2s30vq100 on 2018/09/12 at 15:18:46
SmartCard Slot: not available
         
uC: AT91SAM7S256 Rev B         
Embedded Processor: ARM7TDMI         
Nonvolatile Program Memory Size: 256K bytes. Used: 198864 bytes (76%). Free: 63280 bytes (24%).         
Second Nonvolatile Program Memory Size: None         
Internal SRAM Size: 64K bytes         
Architecture Identifier: AT91SAM7Sxx Series         
Nonvolatile Program Memory Type: Embedded Flash Memory

hw tune

Measuring antenna characteristics, please wait.........         
# LF antenna: 24.06 V @   125.00 kHz         
# LF antenna: 19.80 V @   134.00 kHz         
# LF optimal: 23.65 V @   123.71 kHz         
# HF antenna: 24.78 V @    13.56 MHz         
Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.

Im totally new on this and trying to get this to work, I will appreciate the help..

Thank you.

iceman

Administrator

Registered: 2013-04-25

Posts: 9,538

Website

Re: hello, LF T55xx chinese unknown card

Welcome and I suggest you read http://www.proxmark.org/forum/viewtopic.php?id=1125 as an introduction.

Your access rights has been updated.