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The Polylog Crypto Intelligence Brief

Morning Edition · Monday, June 22, 2026

Microsoft Flags USB-Borne Wallet Malware as a Distinct Attack Surface Grows

Beyond smart-contract exploits, key-stealing malware that compromises the device itself is becoming a separate and expanding threat to self-custody, alongside a steady series of mid-size decentralized finance (DeFi) thefts.

Microsoft Flags USB-Borne Wallet Malware as a Distinct Attack Surface Grows

Microsoft has warned of a malware family it links to a campaign that uses USB drives to reach crypto wallets on compromised machines, CryptoSlate reported. The research highlights a threat that avoids on-chain defenses entirely. A compromis…

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Endpoint Malware Targets Crypto Keys Beyond Smart-Contract Exploits

Beyond on-chain contract exploits, key-harvesting malware targets private keys at the device and supply-chain level, opening a distinct and growing attack surface for crypto holders.