ProxmarkPro - Sniffing a Mifare 4K Tag

October 21, 2019

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

For this blog post you will need the following:

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

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

Sniffing a Mifare 4K

3. Place Mifare 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 |      2368 | Tag | 02  00                                                          |     | 
      4796 |      7260 | Rdr | 93  20                                                          |     | ANTICOLL
      7260 |      8448 |     | fdt (Frame Delay Time): 1188
      8448 |     14272 | Tag | de  3d  62  4d  cc                                              |     | 
     16572 |     27036 | Rdr | 93  70  de  3d  62  4d  cc  e5  ca                              |     | SELECT_UID
     27036 |     28288 |     | fdt (Frame Delay Time): 1252
     28288 |     31872 | Tag | 18  37  cd                                                      |     | 
   1248828 |   1249820 | Rdr | 52                                                              |     | WUPA
  -1069812 |  -1069524 | Rdr | 00!                                                             |     | ?
  -1069524 |   2464512 |     | fdt (Frame Delay Time): 3534036
   2464512 |   2466880 | Tag | 02  00                                                          |     | 
   2472960 |   2478784 | Tag | de  3d  62  4d  cc                                              |     | 
   2492800 |   2496384 | Tag | 18  37  cd                                                      |     | 
   5014476 |   5015468 | Rdr | 52                                                              |     | WUPA
   5015468 |   5016720 |     | fdt (Frame Delay Time): 1252
   5016720 |   5019088 | Tag | 02  00                                                          |     | 
   5021516 |   5023980 | Rdr | 93  20                                                          |     | ANTICOLL
   5023980 |   5025152 |     | fdt (Frame Delay Time): 1172
   5025152 |   5030976 | Tag | de  3d  62  4d  cc                                              |     | 
   5033292 |   5043756 | Rdr | 93  70  de  3d  62  4d  cc  e5  ca                              |     | SELECT_UID
   5043756 |   5044992 |     | fdt (Frame Delay Time): 1236
   5044992 |   5048576 | Tag | 18  37  cd                                                      |     | 
   6265420 |   6266412 | Rdr | 52                                                              |     | WUPA
   7516492 |   7517484 | Rdr | 52                                                              |     | WUPA
   7517484 |   7518736 |     | fdt (Frame Delay Time): 1252
   7518736 |   7521104 | Tag | 02  00                                                          |     | 
   7523532 |   7525996 | Rdr | 93  20                                                          |     | ANTICOLL
   7525996 |   7527184 |     | fdt (Frame Delay Time): 1188
   7527184 |   7533008 | Tag | de  3d  62  4d  cc                                              |     | 
   7535308 |   7545772 | Rdr | 93  70  de  3d  62  4d  cc  e5  ca                              |     | SELECT_UID
   7545772 |   7547024 |     | fdt (Frame Delay Time): 1252
   7547024 |   7550608 | Tag | 18  37  cd                                                      |     | 
   8767564 |   8768556 | Rdr | 52                                                              |     | WUPA
   8768556 |  10020880 |     | fdt (Frame Delay Time): 1252324
  10020880 |  10023248 | Tag | 02  00                                                          |     | 
  10029328 |  10035152 | Tag | de  3d  62  4d  cc                                              |     | 
  10049168 |  10052752 | Tag | 18  37  cd                                                      |     | 
  -1069812 |  -1069396 | Rdr | 00!  





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