[Unauthorized Circuit Found in Hardware Wallet Over a Year Before This Week's Ledger Supply Chain Attack Was Exposed] Odaily Planet Daily News: According to Bitcoin News monitoring, renowned hardware security researcher and computer engineer Joe Grand (social media account @joegrand, also known as 'Kingpin') stated that in August 2025, a man in Thailand contacted him claiming to have discovered a compromised Ledger Nano X. The man had previously purchased a cheap Ledger device online to replace the battery in his existing device. Upon opening the device, he found a smaller battery, unauthorized circuits, additional wiring, and an antenna inside. After posting his findings on Reddit, the man reportedly received little attention from local police and subsequently reached out to Grand to investigate. This discovery predates the major public controversy surrounding the Ledger supply chain attack by over a year; according to reports, nearly $1 billion in cryptocurrency has already been stolen this week.