Proxmark3 community

luka

Contributor

Registered: 2016-12-06

Posts: 4

Brute Force Key

hey there felas,

so heres my question,
is there any tools to BF the key?

i have a card which does not allow me to read any block of it not even block 0, i was able to read the UID of the card but that it.
and then it hit me, i cant read anything since i dont have the key,  i tried " hf mf chk * ? "  , nothing, so my question is , is there a tool out there to BF the key ?

i've got my old proxmark

"Prox/RFID mark3 RFID instrument
bootrom: master/v3.0.1-391-gc80eb8b-suspect 2018-08-14 12:06:40
os: master/v3.0.1-391-gc80eb8b-suspect 2018-08-14 12:06:43
fpga_lf.bit built for 2s30vq100 on 2015/03/06 at 07:38:04
fpga_hf.bit built for 2s30vq100 on 2017/10/27 at 08:30:59
uC: AT91SAM7S256 Rev B
Embedded Processor: ARM7TDMI
Nonvolatile Program Memory Size: 256K bytes. Used: 193759 bytes (74%). Free: 68385 bytes (26%).
Second Nonvolatile Program Memory Size: None
Internal SRAM Size: 64K bytes
Architecture Identifier: AT91SAM7Sxx Series
Nonvolatile Program Memory Type: Embedded Flash Memory"

now the strange thing i have is, each time i am reading my card, the UID changes ! like wtf.

first time the uid was 2213af61,  than d4c27f33   then  c9 f5 14 77 protocol didnt change tho.

this is my card i am having

proxmark3> hf search
hf search

14443-3b tag found:
           UID: 22 13 af 61
      App Data: 00 00 00 00
      Protocol: 77 83 a1
      Bit Rate: 212 kbit/s PICC -> PCD supported
      Bit Rate: 424 kbit/s PICC -> PCD supported
      Bit Rate: 847 kbit/s PICC -> PCD supported
      Bit Rate: 212 kbit/s PICC <- PCD supported
      Bit Rate: 424 kbit/s PICC <- PCD supported
      Bit Rate: 847 kbit/s PICC <- PCD supported
Max Frame Size: 256
 Protocol Type: Protocol is compliant with ISO/IEC 14443-4
Frame Wait Int: 10
 App Data Code: Application is Proprietary
 Frame Options: NAD is not supported
 Frame Options: CID is supported
Max Buf Length: 0 (MBLI) not supported

Valid ISO14443B Tag Found - Quiting Search

proxmark3> hf mf chk * ?
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...
--#db# ChkKeys: Can't select card
#db# ChkKeys: Can't select card
#db# ChkKeys: Can't select card
#db# ChkKeys: Can't select card
#db# ChkKeys: Can't select card
#db# ChkKeys: block=0 key=0. Can't select. Exit...
.
No valid keys found.

thanks for the help and direction