Proxmark3 community

Learner4Life

Contributor

Registered: 2017-09-14

Posts: 13

SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

Hi Iceman / All,

I noticed after the sectors write successfully, the chinese card GEN1 is reporting different SAK number. 88 [2] instead of 08 [2].
Card type also have changed from NXP MIFARE CLASSIC 1k | Plus 2k SL1 to Infineon MIFARE CLASSIC 1K.
have tested the clone card and it doesn’t work.

Trying to understand, how to solve this?

Proxmark Details

Magic Card details before cloning

Original Card Details to be Cloned

All keys were found and I cross checked same using Lua Script. I can see whole table.

After Cloning, SAK value of Magic card changes from SAK08 to SAK88 while original card has SAK08. Card type also have changed from NXP MIFARE CLASSIC 1k | Plus 2k SL1 to Infineon MIFARE CLASSIC 1K.

Last edited by Learner4Life (2018-12-20 10:35:07)

zantzue

Contributor

Registered: 2018-12-13

Posts: 38

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

Same problem here. I cloned the tag we use to recycle organic waste and the SAK changed.

pm3 --> hf search
 UID : 4A A1 83 A5
ATQA : 00 04
 SAK : 88 [2]
TYPE : Infineon MIFARE CLASSIC 1K
[=] proprietary non iso14443-4 card found, RATS not supported
[+] Answers to magic commands (GEN 1a): YES
[+] Prng detection: WEAK

[+] Valid ISO14443-A Tag Found

I'll test the card later. Will it open the bin? (not asking, just wondering)

Edit: It opens it! but it seems it stores some kind of information after using it as some blocks changed. I used the original one after using the clone and I could open the bin but maybe it's not a good idea to use both (I wanted to give my wife a copy as we were given just one).

Last edited by zantzue (2018-12-30 20:03:09)

iceman

Administrator

Registered: 2013-04-25

Posts: 9,537

Website

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

you can change sak /atqa  for most magic cards.   

read helptext

hf mf csetuid h

zantzue

Contributor

Registered: 2018-12-13

Posts: 38

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

I tried "hf mf csetuid 4aa183a5 0004 08" and it did the trick. Now the clone is exactly the same (except for it answers to magic commands).

Pericles

Contributor

Registered: 2021-09-18

Posts: 4

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

you can change sak /atqa  for most magic cards.   

Thanks for this insight, Iceman!

hf mf csetuid h

I guess since I have the Proxmark3 RDV3.0, the syntax is a little different. In my case, it wouldn't accept the commands mentioned here. This seemed to work:  hf mf csetuid -w -u ******** -atqa 0004 --sak 08 but didn't solve the issue--as in the clone is still not working. I have the same exact issue as the OP, but changing the SAK after the clone is produced didn't correct it, and I didn't find relief by changing block 0 so far.

I purchased 200 key tags from two different vendors in China using AliExpress. The batch of 100 black ones all perform like the OP mentioned, and the other 100 were from a different source and were a batch of multi-colored tags, but only the black ones have worked. I wrote them using ACR122U.

Any ideas on how to get these tags working?

Thanks!

iceman

Administrator

Registered: 2013-04-25

Posts: 9,537

Website

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

the syntax has change since 2018..  but congrats of bringing back a thread from the dead

Before there were a thread about magic uid cards here on the forum but it was hard to read and follow.
So Doegox compiled a nice document https://github.com/RfidResearchGroup/pr … s_notes.md

Pericles

Contributor

Registered: 2021-09-18

Posts: 4

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

the syntax has change since 2018..  but congrats of bringing back a thread from the dead

Haha! I was thinking about that when I saw the date, but I'm just getting into this stuff and gotta do something with all these tags:)

Before there were a thread about magic uid cards here on the forum but it was hard to read and follow.
So Doegox compiled a nice document https://github.com/RfidResearchGroup/pr … s_notes.md

So Iceman--you're the guru and architect of this firmware and the latest Proxmark...that link you sent me is pretty comprehensive. Do you happen to know if I can just freeze the SAK and then clone the tag? I don't have the expertise yet to suss out if there's a solution among the options in this exquisite document.

Pericles

Contributor

Registered: 2021-09-18

Posts: 4

Re: SAK: Discrepancy (08 and 88) - Cloned MIFARE Classic card Fails

the syntax has change since 2018..  but congrats of bringing back a thread from the dead

Haha! I was thinking about that when I saw the date, but I'm just getting into this stuff and gotta do something with all these tags:)

Before there were a thread about magic uid cards here on the forum but it was hard to read and follow.
So Doegox compiled a nice document https://github.com/RfidResearchGroup/pr … s_notes.md

So Iceman--you're the guru and architect of this firmware and the latest Proxmark...that link you sent me is pretty comprehensive. Do you happen to know if I can just freeze the SAK and then clone the tag? I don't have the expertise yet to suss out if there's a solution among the options in this exquisite document.

Anyone?

Thanks!