Darkside Is not working anymore

[DREAMSOLDIERc404]

Photo of the problem

Explaining the problem

I tried with 4 different tags from different manufacturers, two legit:

• A water dispenser
• An access badge

Two Chinese:

• mf-UID
• Magic gen2

The same problem appeared on all of the! Finally I add that they are not static nonce tags.

It is really annoying, I tried all 4 with mfcuk (both 3.8 and 3.3/rev65) and it did not give any error signs.
At this point it is not a strange behavior but a code error, I ask for your collaboration to reach a solution together.
Does it give you the same error or have you had success in darkside attacks with the latest updates?

[iceman1001]

what does hf mf info say about all your four cards?

[DREAMSOLDIERc404]

1) Water dispenser tag:

2) Access badge:

3) mf-UID:

4) Magic GEN2:

[iceman1001]

Are you on the latest source?

And I will take a look at some MFC cards later today

[DREAMSOLDIERc404]

Yep i've literaly update exactly before run the tests.

[iceman1001]

the question now is darkside stopped working. You can do a git bisect and find the offending change

[DREAMSOLDIERc404]

i was searching for a good commit but i got stuck in a compatibility exception with strings format due to some package too old version required, but i managed to see that

commit 7368cccdf90b4c68ae598ff27ee2e9db5b71e1a4 (HEAD -> master)
Author: iceman1001 <iceman@iuse.se>
Date:   Mon May 29 06:57:39 2023 +0200

Disney MagicBand

is still a bad commit and it's very old so i don't know if i can go to search for older commit or assume that it could be 2 other possibily reasons:

1. Problems of compatibilty with my reader (or wrong configuraton file setted)
2. The tags are the problem but i can't find why
3. • It could be another softrware problem not considered

[iceman1001]

2023 ?? That sounds way too old.

[DREAMSOLDIERc404]

Yes, I agree with you... but you can do a test on your proxmark?
Oh right because i have a pm3 generic, but before you say that is chinese garbage i want to ask if you could run some rapid tests pleaseeeee 😢

[DREAMSOLDIERc404]

I'd like a response... If there's something else i can do, can you tell me please? 🥺

[iceman1001]

Not much to say about it, it doesn't work currently. My time is limited so I will leave it here open for others to help

[jkramarz]

In general, it works on master:

  [ Proxmark3 ]

    MCU....... AT91SAM7S512 Rev A
    Memory.... 512 KB ( 77% used )
    Target.... RDV4

    Client.... Iceman/master/v4.20469-185-g7085e8ff7 2025-08-18 14:03:48
    Bootrom... Iceman/master/v4.20469-185-g7085e8ff7-suspect 2025-08-18 14:04:13 ef5b2e843
    OS........ Iceman/master/v4.20469-185-g7085e8ff7-suspect 2025-08-18 14:04:26 ef5b2e843


[usb] pm3 --> hf mf darkside
[=] Expected execution time is about 25 seconds on average
[=] Press pm3 button to abort

[=] Running darkside ......
[+] found 1 candidate key
[+] Found valid key [ BC9AD1E14A16 ]
[+] Time in darkside 26 seconds

I failed to find a tag, that works at 7368ccc but doesn't work at 7085e8f.