Proxmark Pro - Sniffing a Mifare Desfire 4K Tag

October 21, 2019

This post covers how to sniff a Mifare Desfire 4K tag with the ProxmarkPro. 

For this blog post you will need the following:

  • ProxmarkPro
  • Mifare Desfire 4K Tag
  • High Frequency Reader

1. Navigate to HF Sniff section. HF 13.56MHz -> Sniff ISO14A.

2. Place ProxmarkPro HF antenna over reader and begin sniffing.

Sniffing a Mifare Desfire 4K

3. Place Mifare Desfire 4K tag over ProxmarkPro antenna and reader. Allow some time for the ProxmarkPro to sniff the traffic. Stop the ProxmarkPro by pressing the <- button. The information will now be saved to a folder on the SD Card called SNIFF14A under SNIFF#.txt

ProxmarkPro - HF Sniffing LCD

4. Eject your SD card and connect it to your computer. When you open the SNIFF#.txt file you should see traffic similar to the example below. 

Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer
iso14443a - All times are in carrier periods (1/13.56Mhz)
iClass    - Timings are not as accurate

     Start |       End | Src | Data (! denotes parity error)                                   | CRC | Annotation         |
-----------|-----------|-----|-----------------------------------------------------------------|-----|--------------------|
         0 |       256 | Tag | 00!                                                             |     | 
     97440 |     97632 | Tag | 01                                                              |     | 
    405580 |    406636 | Rdr | 26                                                              |     | REQA
   4585596 |   4586652 | Rdr | 26                                                              |     | REQA
   8765612 |   8766668 | Rdr | 26                                                              |     | REQA
   8766668 |   8768224 |     | fdt (Frame Delay Time): 1556
   8768224 |   8770208 | Tag | e8! 20                                                          |     | 
   8777356 |   8782124 | Rdr | 50  00  57  cd                                                  |     | HALT
   9317164 |   9318220 | Rdr | 26                                                              |     | REQA
   9318220 |   9319392 |     | fdt (Frame Delay Time): 1172
   9319392 |   9321760 | Tag | 44  03                                                          |     | 
   9329068 |   9331532 | Rdr | 93  20                                                          |     | ANTICOLL
   9331532 |   9332720 |     | fdt (Frame Delay Time): 1188
   9332720 |   9338544 | Tag | 88  04  41  62  af                                              |     | 
   9346172 |   9356700 | Rdr | 93  70  88  04  41  62  af  b7  2c                              |     | SELECT_UID
   9356700 |   9357872 |     | fdt (Frame Delay Time): 1172
   9357872 |   9361392 | Tag | 24  d8  36                                                      |     | 
   9368572 |   9371036 | Rdr | 95  20                                                          |     | ANTICOLL-2
   9371036 |   9372208 |     | fdt (Frame Delay Time): 1172
   9372208 |   9378032 | Tag | ba  4d  3c  80  4b                                              |     | 
   9385660 |   9396188 | Rdr | 95  70  ba  4d  3c  80  4b  53  5d                              |     | ANTICOLL-2
   9396188 |   9397360 |     | fdt (Frame Delay Time): 1172
   9397360 |   9400944 | Tag | 20  fc  70                                                      |     | 
   9408236 |   9413004 | Rdr | e0  81  b8  62                                                  |     | RATS
   9413004 |   9414176 |     | fdt (Frame Delay Time): 1172
   9414176 |   9423456 | Tag | 06  75  77  81  02  80  02  f0                                  |     | 
   9436860 |   9442716 | Rdr | d1  11  0a  d4  53                                              |     | ?
   9442716 |   9443952 |     | fdt (Frame Delay Time): 1236
   9443952 |   9447472 | Tag | d1  fa  96                                                      |     | 
   9752192 |   9752448 | Tag | 00!





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