Proxmark3 community

The_swon_men

Contributor

Registered: 2020-01-14

Posts: 16

Modification of an access bit line

Hello everybody,

I made a little mistake on my business mifare card.
Without paying attention I modified line 44 of block 10... The access bits have been modified too with the line /

hf mf wrbl 44 B 415A54454B4D BBBF9382EC757C92053CCAE47FE9ABCF

Problem: I can't modify them to have access to my sector 10 again...

Can you please tell me how to do it?

Thanks
Best regards
TSM

mwalker

Moderator

Registered: 2019-05-11

Posts: 318

Re: Modification of an access bit line

Have a look at
https://cardinfo.barkweb.com.au/index.p … =19&sub=20
key in your "new" security bits and see what they mean.
Key A                A.Bits         KeyB
BBBF9382EC75 7C9205 3C CAE47FE9ABCF

The_swon_men

Contributor

Registered: 2020-01-14

Posts: 16

Re: Modification of an access bit line

Hello, and thank you for your response,

If I understand correctly, I've locked an area and I can't read or write on it anymore... it's over, right?

Thanks

Last edited by The_swon_men (2020-08-06 16:19:01)

Ollibolli

Contributor

Registered: 2019-04-27

Posts: 51

Re: Modification of an access bit line

Yes, it seems so...:-(

Do you have the original dump (before modify) of your business-card?

The_swon_men

Contributor

Registered: 2020-01-14

Posts: 16

Re: Modification of an access bit line

Hello,

Of course I have a dump... the solution would be to put the dump on a Chinese card...
But I'm gonna try to do the dump at the Badge Department

I'll let you know.