Simulated MIFARE Classic Card Responding Differently to 0x02 Command

[sleepwalkera]

I’ve encountered an issue while using Proxmark3 to simulate a MIFARE Classic (M1) card on a specific reader. The simulated card does not work correctly with the reader, while the actual card works fine. Below, I have provided the logs for both the simulated card and the real card communication with the reader.

Simulated Card Communication Log:

      Start |        End | Src | Data (! denotes parity error)                                           | CRC | Annotation
------------+------------+-----+-------------------------------------------------------------------------+-----+--------------------
          0 |        352 | Rdr |02(2)                                                                    |     | 
       2612 |       8500 | Tag |02  00  00  AC  10                                                       |     | 
   17483194 |   17484250 | Rdr |26(7)                                                                    |     | REQA
   17485422 |   17487790 | Tag |04  00                                                                   |     | 
   20391518 |   20392574 | Rdr |26(7)                                                                    |     | REQA
   20393746 |   20396114 | Tag |04  00                                                                   |     | 
   28637332 |   28638388 | Rdr |26(7)                                                                    |     | REQA
   28639560 |   28641928 | Tag |04  00                                                                   |     | 
   36372700 |   36373756 | Rdr |26(7)                                                                    |     | REQA
   36374928 |   36377296 | Tag |04  00                                                                   |     | 
   39034626 |   39034978 | Rdr |02(2)                                                                    |     | 
   39037238 |   39043126 | Tag |02  00  00  AC  10                                                       |     | 
   55772118 |   55772470 | Rdr |02(2)                                                                    |     | 
   55774666 |   55780554 | Tag |02  00  00  AC  10                                                       |     | 
   56503810 |   56504866 | Rdr |26(7)                                                                    |     | REQA
   56506038 |   56508406 | Tag |04  00                                                                   |     | 
   86559708 |   86560060 | Rdr |02(2)                                                                    |     | 
   86562320 |   86568208 | Tag |02  00  00  AC  10                                                       |     | 
   89223774 |   89224830 | Rdr |26(7)                                                                    |     | REQA
   89226002 |   89228370 | Tag |04  00                                                                   |     | 
   97686394 |   97686746 | Rdr |02(2)                                                                    |     | 
   97688942 |   97694830 | Tag |02  00  00  AC  10                                                       |     | 
   98418518 |   98419574 | Rdr |26(7)                                                                    |     | REQA
   98420682 |   98423050 | Tag |04  00                                                                   |     | 

Real Card Communication Log:

      Start |        End | Src | Data (! denotes parity error)                                           | CRC | Annotation
------------+------------+-----+-------------------------------------------------------------------------+-----+--------------------
          0 |       2368 | Tag |04  00                                                                   |     | 
    2317532 |    2317884 | Rdr |02(2)                                                                    |     | 
    2319776 |    2322144 | Tag |04  00                                                                   |     | 
    2568956 |    2571420 | Rdr |93  20                                                                   |     | ANTICOLL
    2572592 |    2578480 | Tag |43  6E  CF  52  B0                                                       |     | 
    2833676 |    2844140 | Rdr |93  70  43  6E  CF  52  B0  45  27                                       |  ok | SELECT_UID
    2845376 |    2848896 | Tag |08  B6  DD                                                               |  ok | 
    3332156 |    3336860 | Rdr |60  27  48  2E                                                           |  ok | AUTH-A(39)
    3338480 |    3343216 | Tag |EE  FE  7F  01                                                           |     | AUTH: nt 
    3558748 |    3568124 | Rdr |73  B2  43  96! 33  79! 4D  21!                                          |     | AUTH: nr ar (enc)
    3569296 |    3574032 | Tag |a4! E8  71! 05!                                                          |     | AUTH: at (enc)
    3802364 |    3807132 | Rdr |25  AB  a9! A4                                                           |     | 
            |            |  *  |                                              key 013F0E139C0A prng WEAK |     |
            |            |  *  |30  24  24  CF                                                           |  ok | READBLOCK(36)
    3808304 |    3829168 | Tag |28! cf! a6! 23  61  58! E3  57  6F  6D  61! 06! EC  9D  9b! 97! 20  EF   |     | 
            |            |  *  |01  0B  B8  08  BB  B3  B0  03  4C  4C  FB  E9  FE  EB  E0  F0  3E  C9   |  ok | 
    5969996 |    5971052 | Rdr |26(7)                                                                    |     | REQA
    5972240 |    5974608 | Tag |04  00                                                                   |     | 
    6223324 |    6223548 | Rdr |01(1)                                                                    |     | 
    6226976 |    6232864 | Tag |43  6E  CF  52  B0                                                       |     | 
    6501680 |    6505200 | Tag |08  B6  DD                                                               |  ok | 
    8074032 |    8076400 | Tag |04  00                                                                   |     | 
    8325132 |    8327596 | Rdr |93  20                                                                   |     | ANTICOLL
    8328784 |    8334672 | Tag |43  6E  CF  52  B0                                                       |     | 
    8591260 |    8601724 | Rdr |93  70  43  6E  CF  52  B0  45  27                                       |  ok | SELECT_UID
    8602960 |    8606480 | Tag |08  B6  DD                                                               |  ok | 
   10416892 |   10417948 | Rdr |26(7)                                                                    |     | REQA
   10419136 |   10421504 | Tag |04  00                                                                   |     | 
   10670220 |   10670444 | Rdr |01(1)                                                                    |     | 
   10673872 |   10679760 | Tag |43  6E  CF  52  B0                                                       |     | 
   10936620 |   10947084 | Rdr |93  70  43  6E  CF  52  B0  45  27                                       |  ok | SELECT_UID
   10948320 |   10951840 | Tag |08  B6  DD                                                               |  ok | 

Problem Summary:

One key difference is the response to the 02 command. The real card responds with 04 00, whereas the simulated card responds with 02 00 00 AC 10. This discrepancy might be related to the simulated card failing on the reader, but I'm not entirely certain if this is the root cause.

Details:

• Firmware: Latest version of Proxmark3 (v4.18589)
• Hardware: Radiowar Black Edition

Could you please help me understand why this discrepancy occurs and how I can configure Proxmark3 to simulate the card correctly? Any guidance or suggestions for further troubleshooting steps would be greatly appreciated.

Thank you for your time and support!

[iceman1001]

This sounds like a user related issue, please ask questions in the discord server.

[sleepwalkera]

Recently, I used a Chameleon to emulate the same card, and it worked perfectly with this reader. It seems like a compatibility issue between the Proxmark3 emulated card and this specific reader. Any suggestions?

[iceman1001]

Which commands did you use when running the simulation?