Are these valid T5577 cards

Lounge
1

Hey all,

I ordered some T5577 fobs to enroll in my HID LF access control system for some of my non implanted (yet) friends, only to find that they might not actually be T5577 chips. Before I file a complaint with the seller, is there anything else I can do with my Proxmark to validate if they are in fact T5577 cards or not?

output of lf search

[usb] pm3 --> lf search

[=] NOTE: some demods output possible binary
[=] if it finds something that looks like a tag
[=] False Positives ARE possible
[=] 
[=] Checking for known tags...
[=] 
[+] EM 410x ID 0000002049
[+] EM410x ( RF/64 )
[=] -------- Possible de-scramble patterns ---------
[+] Unique TAG ID      : 0000000492
[=] HoneyWell IdentKey
[+]     DEZ 8          : 00008265
[+]     DEZ 10         : 0000008265
[+]     DEZ 5.5        : 00000.08265
[+]     DEZ 3.5A       : 000.08265
[+]     DEZ 3.5B       : 000.08265
[+]     DEZ 3.5C       : 000.08265
[+]     DEZ 14/IK2     : 00000000008265
[+]     DEZ 15/IK3     : 000000000001170
[+]     DEZ 20/ZK      : 00000000000000040902
[=] 
[+] Other              : 08265_000_00008265
[+] Pattern Paxton     : 1334857 [0x145E49]
[+] Pattern 1          : 5888 [0x1700]
[+] Pattern Sebury     : 8265 0 8265  [0x2049 0x0 0x2049]
[=] ------------------------------------------------

[+] Valid EM410x ID found!

[=] Couldn't identify a chipset

output of lf t55xx detect

usb] pm3 --> lf t55xx detect
[!] ⚠️  Could not detect modulation automatically. Try setting it manually with 'lf t55xx config'
1 Like
2

You can try a lf t5 p1detect but to be honest with you I’m not certain how that works

This post has some more advice too:

1 Like
3

Thanks for the suggestion, same output unfortunately

[usb] pm3 --> lf t5 p1detect
[!] ⚠️  Could not detect modulation automatically. Try setting it manually with 'lf t55xx config'

I did try a wipe and detect as well but no dice.

I’ll have a look at the other thread, thanks for the link.

1 Like
4

Try writing to one in HID format and see what happens. If it changes from an EM card to a HID it should be right.

2 Likes
5

Try running lf t5 detect then lf t5 read -b 1 --pg1

If a t55 knockoff has traceability data that the pm3 client doesn’t like then the client will assume it’s not seeing a t55 at all. If I remember in about 8 hours when I wake up I’ll grab the t55 knockoff I just encountered the other day and post a better example

3 Likes
6

Thanks for the suggestion, no luck sadly:

usb] pm3 --> lf t5 detect
[!] ⚠️  Could not detect modulation automatically. Try setting it manually with 'lf t55xx config'
[usb] pm3 --> lf t5 read -b 1 --pg1
[+] Reading Page 1:
[+] blk | hex data | binary                           | ascii
[+] ----+----------+----------------------------------+-------
[usb] pm3 --> lf t5 detect
[!] ⚠️  Could not detect modulation automatically. Try setting it manually with 'lf t55xx config'

at this point I think I’ll cut my losses and try to force the seller to take these back - clearly they are not T5577 chips and it was misadvertised.

1 Like