Proxmark3 community

funktown911

Contributor

Registered: 2018-07-10

Posts: 9

Cracking Encryption of MIFARE Classic Card

I am new to all of this so I am still trying to figure everything out. Anyways, I have a MIFARE Classic card that does not respond to the default keys. Is there any way to crack the encryption key on a card such as this one? I have included the information that I got when I ran the command "hf 14a info" and "hf mf chk * ?" below.

proxmark3> hf 14a info
UID : 04 f5 58 a2 8e 2a 80
ATQA : 00 44
SAK : 00 [2]
TYPE : MIFARE Ultralight C (MF0ULC)
MANUFACTURER : NXP Semiconductors Germany
proprietary non iso14443-4 card found, RATS not supported
No chinese magic backdoor command detected
proxmark3>
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...
--.
No valid keys found.

Please let me know if you guys have any advice!

iceman

Administrator

Registered: 2013-04-25

Posts: 9,501

Website

Re: Cracking Encryption of MIFARE Classic Card

Usually the wiki is a good starting point.

funktown911

Contributor

Registered: 2018-07-10

Posts: 9

Re: Cracking Encryption of MIFARE Classic Card

Iceman, I've looked at the wiki page and the only solution I could see was to use the command that I originally used ("hf mf chk * ?") to test the default keys, or to use the darkside attack command "hf mf mifare". I have also read that newer MIFARE cards are no longer prone to the darkside attack, so is there any other possible way to crack the key without these two commands?

iceman

Administrator

Registered: 2013-04-25

Posts: 9,501

Website

Re: Cracking Encryption of MIFARE Classic Card

close but no disco.  You have mixed things up.  I give you a hint.

TYPE : MIFARE Ultralight C (MF0ULC)

funktown911

Contributor

Registered: 2018-07-10

Posts: 9

Re: Cracking Encryption of MIFARE Classic Card

Oh, I see the problem now, I had initially read that C as a classic, sorry I am new to this, so seeing as the card is MIFARE Ultralight C there is currently no way to try to break the encryption? Please correct me if I am wrong but after doing a little research it appears as though as long as it has a 3des encryption, which it does, you cannot break it.

iceman

Administrator

Registered: 2013-04-25

Posts: 9,501

Website

Re: Cracking Encryption of MIFARE Classic Card

well,  depends if you are lucky or not.
Have you tried the dedicated commands?

hf mfu