#Cracking mifare ultralight how to#
#Cracking mifare ultralight install#
#Cracking mifare ultralight plus#

When most modern cards are placed next to a card reader thereвЂ™s a handshake to ensure the card has the expected keys. This whole process can be completed in a minute or two, so itвЂ™s not a quick read of the card by any means. Now we just need to give the card the UID we got from the original hf search command: proxmark3> hf mf csetuid ba2ea6ab This restores the dumped data onto the new card. To copy that data onto a new card, place the (Chinese backdoor) card on the proxmark: proxmark3> hf mf restore 1 This dumps data from the card into dumpdata.binДЄt this point weвЂ™ve got everything we need from the card, we can take it off the reader. Now to dump the contents of the card: proxmark3> hf mf dump This dumps keys from the card into the file dumpkeys.bin. This shows a key of ffffffffffff, which we can plug into the next command, which dumps keys to file: proxmark3> hf mf nested 1 0 A ffffffffffff d sector:15, block: 63, key type:B, key count:13 sector: 0, block: 3, key type:A, key count:13 This should show us the key we require looking something like: No key specified, trying default keys From there we can find keys in use by checking against a list of default keys (hopefully one of these has been used): proxmark3> hf mf chk * ? This also shows us the UID (ba2ea6ab) of the card, which weвЂ™ll need later. Valid ISO14443A Tag Found - Quitting Search Proprietary non iso14443-4 card found, RATS not supportedДЄnswers to chinese magic backdoor commands: NO

#Cracking mifare ultralight plus#

TYPE : NXP MIFARE CLASSIC 1k | Plus 2k SL1 Which results in a response along the lines of: #db# DownloadFPGA(len: 42096) You should now have a proxmark command prompt, so with a card on the proxmark, assuming itвЂ™s a high frequency card, you can: proxmark3> hf search dev/cu.usbmodem14101 : > ls /dev/cu*Д¬onnect to the modem show from the last command: > /proxmark3 /dev/cu.usbmodem14101

#Cracking mifare ultralight install#

Install from the command line (IвЂ™m using a Mac here): > brew tap proxmark/proxmark3Д¬hange to your proxmark client directory: > cd proxmark3/client ItвЂ™s useful to have one of these before progressing. If you want a clone of the card then you want both the UID and the data on the card to be copied across to the new card, but this isnвЂ™t normally possible due to the UID being read only.Д®nter the вЂњUID changeableвЂќ, aka вЂњChinese backdoorвЂќ (seriously) cards, which allow you to change their UID. They get written when the card is created and that area of memory is then made read only, so it canвЂ™t be changed. A quick note on cloning a cardД¬ards typically have their own unique ID (UID).

Hopefully this step by step guide means others wonвЂ™t need to do the trek.

#Cracking mifare ultralight how to#

Understanding how to clone this card felt like a bit of a trek, but once I got there it didnвЂ™t seem like such a big deal. I have so far had experience with a few different card types, the only relatively easily cloneable one being the Mifare Classic 1K. Maybe some of the security isnвЂ™t that strong but the card type isnвЂ™t popular enough to have had people scrutinise it. ItвЂ™s really not that straight forward, there are different cards with different functionality, some have defaults that make it simple to clone them (if the defaults havenвЂ™t been changed), some have good security and there are currently no methods to clone them вЂ“ unless youвЂ™ve already got access keys.

When I first started using the Proxmark, it all sounded like it was going to be easy, you wave a card at the device, the Proxmark works itвЂ™s magic and then you can emulate or clone the card.