MIFARE Classic® Compatible 1K One Time Write UID Modifiable Coin Tag (Gen2a)

€3.50
€3.50
€0
Sold out
Quantity must be 1 or more

INTRODUCTION

Need to make perfect, undetectable of MIFARE Classic® 1K Cards ?

Many access control systems / RFID readers are now able to detect "Chinese Magic" tags by sending the "Unlock Command" (0x40 / 0x43). If the badge replies, it is flagged as an imposter / clone and rejected.

These "Gen2a" badges allow the UID to be set one time only - and after that - the tag never responds to magic commands. This allows you to make undetectable, perfect clones.

Once the UID has been set, the tag acts as a normal card. You can change the data of the card as many times as required - we've tested up to 10,000 read/write cycles.

Remember: This badge's UID can only be set one time.

These tags are red and in key ring form for convenience.

Technical Specifications
Feature Information Notes
Chipset MIFARE Classic® Compatible
Memory Size 1K
UID Size 4 Byte
UID Modifiable ✔️ One time only
Chip Generation Gen 2 OTW (Gen2a) Chipset Generation Guide
Write Capabilities
UID Modifiable Unlock Required DirectWrite / Block 0 One Time Write Notes
✔️ ✔️ ✔️ UID can only be modified once!
Device Compatibility
Compatibility UID R/W Config Notes
Flipper Zero ✔️ ✔️ ✔️
Proxmark / iCopy-X ✔️ ✔️ ✔️
Android & iOS ✔️ ✔️ ✔️ MTools recommended
LibNFC ✔️ ✔️ ✔️
ChameleonUltra ✔️ ✔️ Requires MTools

Hands on: See the card in action

The MIFARE Classic® Compatible 1K UID One-Time-Write can be used with several tools:

LibNFC - change UID

To update the UID of the badge, simply write the dump contents to the badge.

Proxmark - change UID

To update the UID of the badge, simply write the dump contents to the badge. When using - you are directly modifying the card's configuration. Ensure that all data is correct including BCC - otherwise you will brick your card.

Live Demonstration : LibNFC & Proxmark

Unbricking

"Soft-bricking" refers to when a magic card has been configured in a way that prevents it from being detected. Ways of soft-bricking tags include:

  • Incorrect BCC
  • Incorrect SAK
  • Incorrect ATQA
  • Incorrect ATS
  • Incorrect ACL (Access Control) Values
Some "soft-brick" situations can be resolved with special commands. If your MIFARE Classic® Compatible 1K UID Modifiable is "soft-bricked", you can try recovering it with the following methods:

With Proxmark / iCopy-X

Via external reader/writer and MTOOLS

Select the "UID Changer" function in MTools, select "bricked" and run the task

IMPORTANT:

Lab401 cannot provide refunds under any circumstances for cards that were 'bricked' due to incorrect configurations.

Go to full site