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Hardware backdoors found in Ledger wallets sold through authorized retailers after $102M theft

Ledger confirmed that hardware implants planted in some Ledger Nano X wallets sold by Malaysian reseller CryptoBilis allowed attackers to steal roughly $102 million in crypto. Since then, a European buyer and other researchers have reported finding similar implants in Nano X, Flex and Stax devices purchased from a major German electronics chain, suggesting the tampering extends beyond the single reseller Ledger initially named.

Modified Ledger Nano X wallets found with hidden eSIM to steal seed phrases

Security researchers at Tibane Labs found counterfeit or tampered Ledger Nano X hardware wallets fitted with an extra chip that reads the device's screen output via electromagnetic leakage, plus a hidden LTE modem, eSIM and antenna powered by the wallet's own battery. This setup lets attackers capture a user's seed phrase as it's displayed and transmit it over mobile networks, despite the wallet's Secure Element chip remaining untouched. Ledger has acknowledged at least one customer suffered losses from a manipulated device, with total losses across victims estimated near $100 million.

Ledger confirms hardware implant found in customer device linked to CryptoBilis theft probe

Ledger said its October 10 investigation into reported crypto thefts tied to Southeast Asian reseller CryptoBilis uncovered an unauthorized hardware implant inside one affected customer's wallet. CryptoBilis has suspended sales of all hardware wallets while Ledger works with authorities and contacts other impacted users. Researcher Mark Karpelès separately reported finding suspicious electronics behind the screen of a Ledger Nano X in Malaysia, while blockchain analytics firm Bitquery estimated losses of $92.9 million across 311 wallets, a figure Ledger has not independently confirmed.