Cloning Gproxii Guardall Card

Support
1

Hey , I have been using my proxmark 3 since august and have been having great success cloning key fobs / cards as a side hustle, however I’ve been stuck on one persons key card. Its a guardall gproxii card and I have used the recommended commands in pm3 to clone this card to my t55xx fobs . After I clone it shows done and verified when I search for the card after it comes up as Valid Guardall G-Prox II ID with correct fmt / fc / cn but the raw number is different even after attempting it a few times the raw number isnt identical. I gave him the clones anyway to see if they’d work and he said they dont. Any help regarding this would be great , ill post the commands im using below.

lf search

G-Prox-II - len: 36 FC: 20 Card: 716988, Raw: fbc836a56f13c86021c163da

lf gproxii clone --fmt 36 --fc 20 --cn 716988

Data written and verified

lf gproxii reader

G-Prox-II - len: 36 FC: 20 Card: 716988, Raw: f98c67b8c6318cf10588718e

2

dm me i’ll fix it for ya

1 Like
3

ok check your discord

4

Hi there I’m running into the same issue what was the fix for this?

5

are you the guy i helped o discord

6

Hey all, having the same issue. Is there something general I can try to resolve? Would be good to get some troubleshooting steps on the thread here so we don’t have to bother Equipter each time :joy:

7

add me on discord: equip

(i should really just formalise this into a tut lmao)

1 Like
9

I have had success cloning gprox cards as a t55xx, as that dumps everything and then writing them onto a new tag.

lf gproxii read
[+] G-Prox-II - Len: 26 FC: xxx Card: x3 xor: xx, Raw: f8...

[usb] pm3 --> lf t55xx detect
[=]  Chip type......... T55x7
[=]  Modulation........ BIPHASE
[=]  Bit rate.......... 5 - RF/64
[=]  Inverted.......... No
[=]  Offset............ 32
[=]  Seq. terminator... No
[=]  Block0............ F0150060 (auto detect)
[=]  Downlink mode..... default/fixed bit length
[=]  Password set...... No

[usb] pm3 --> lf t55xx dump

[+] Page 0
[+] blk | hex data | binary                           | ascii
[+] ----+----------+----------------------------------+-------
[+]  00 | F0150060 | 11110000000101010000000001100000 | ...`
...
[+]  07 | 00000000 | 00000000000000000000000000000000 | ....

[+] Page 1
[+] blk | hex data | binary                           | ascii
[+] ----+----------+----------------------------------+-------
[+]  00 | F0150060 | 11110000000101010000000001100000 | ...`
..
[+]  03 | 00000000 | 00000000000000000000000000000000 | ....
[+] saved 48 bytes to binary file /pm3/lf-t55xx-...-dump.bin
[+] saved to json file /pm3/lf-t55xx-...-dump.json

Swap to blank tag

[usb] pm3 --> lf t55xx restore --file lf-t55xx-gprox-dump.json
lf gproxii read
[+] G-Prox-II - Len: 26 FC: xxx Card: x3 xor: xx, Raw: f8...

And that has consistently worked for me.

1 Like
10

Hey, I’m having the same issue. I would really appreciate some help as well. I tried to message you on discord but the message didn’t go through.

1 Like
11

what issue are you having?

1 Like
13

I’m trying to copy a gproxii gaurdall to a t55xx. The raw data is different despite the fmt, fc, and cn appearing correctly.

My problem is identical to OP’s. Any help would be appreciated.

14

fire me a private message with the data you get from lf search

ill send you a write for it

2 Likes
15

thanks, message sent!

16

shot ya a reply, should sort you out :]

17

I am also trying to create new guardall cards since I can buy new ones. I am using proxmark3 with f/w 4.20728. I can copy an existing card that will work with my door reader. I just can’t create a new card. Anyone having success?

18

Did you mean “can’t” buy new ones?

Do you mean “gardall” .. the safe company? Or is there another “guardall” company?

Some photos of the card / fob and the reader you’re using them with would be good for reference.

What do you see if you do an lf search command with the card on it?

1 Like
19

Apologies. Thanks for catching my typo. I can’t source/buy new new cards or fobs. I’m looking for Chubb G Prox II cards or fobs or a way to create new ones. I basically have the same issue as skaterman above.
[=] Checking for known tags…

=

[+] G-Prox-II - Len: 36 FC: 20 Card: 716988 xor: 47, Raw: fbc836a56f13c86021c163da

[+] Valid Guardall G-Prox II ID found!

20

hah well, if the pattern of this thread is any indication, you’ll have to DM and wait for @Equipter :slight_smile:

1 Like
21

in order to create new ones, that’s simple enough but to actually make them work on your system they need to be enrolled in the backend. is this a level of administrative access you have?

1 Like
22

Yup. I have admin access to enroll new ID’s.

1 Like