Ledger identified an unauthorized implant in some devices sold by reseller CryptoBilis that captured 24-word recovery phrases displayed on the screen and transmitted them over a mobile network. If you used one of these devices, the guidance is to act urgently: do not initialize unused devices and, if it has already been used, move the assets to a new device with a freshly generated recovery phrase.
Quick response
- The issue involves a physical supply chain attack, not a breach of Ledger’s software or internal systems.
- The spy chip was inside the device compartment and read the phrase when the screen displayed it during setup.
- The implant recognized and decoded the words and sent them over LTE using an eSIM.
- The recovery phrase is the wallet’s master key; whoever has it can recreate the wallet elsewhere and move the funds.
- Anyone who has already used the device should move the assets to a new device with a new recovery phrase.
What to do after the discovery
If your device came from CryptoBilis and has already been used, treat the situation as a potential exposure of the recovery phrase. The key issue is not just the device itself, but the fact that the phrase may have been captured when it appeared on the screen.
- Stop using the suspicious device for any new setup.
- Do not initialize devices that have not yet been used.
- If you have already set up the device, transfer the assets to a new wallet on a new device.
- Generate a new recovery phrase in that new environment.
- Consider the old phrase compromised, because it may have been copied by the implant.
Why this is serious
The recovery phrase works as the master key to the crypto wallet. That means if someone obtains it, they can recreate the wallet elsewhere and move the funds without needing the original physical device.
The case also highlights a type of risk many companies underestimate: physical tampering before the product is even used. Here, the problem is not a leaked login or an app flaw, but a hidden component inside the equipment.
Who was affected and who was not
The alert applies to some devices sold by CryptoBilis that were tampered with. Ledger also said it is investigating where the devices were modified.
Anyone who has not used the device yet should avoid initializing it. Anyone who has already used it should act as if the recovery phrase may have been exposed and migrate the assets to a new wallet.
Frequently asked questions
Was the problem a Ledger software bug?
No. The case was described as a physical supply chain attack, not a breach of software or internal systems.
How did the implant manage to capture the recovery phrase?
When the user set up the signer and the screen displayed the recovery phrase, the implant’s microcontroller recognized and decoded the words, then transmitted them over LTE using an eSIM.
What should I do if I have not initialized the device yet?
Do not initialize the device. The guidance is to avoid any setup on unused devices until the situation is clarified.
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Source: CoinDesk