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Typosquatted Nethereum NuGet Package Steals Wallet Keys

🔒Security researchers uncovered a NuGet typosquat, Netherеum.All, created to harvest cryptocurrency wallet secrets and exfiltrate them to a hidden command-and-control server. Uploaded on October 16, 2025 by user "nethereumgroup" and removed four days later, the package uses a Cyrillic 'e' homoglyph to impersonate Nethereum and falsely claims 11.7 million downloads to appear legitimate. Socket analysts found an XOR-decoded C2 endpoint (solananetworkinstance[.]info/api/gads) and a payload in EIP70221TransactionService.Shuffle that steals mnemonics, private keys, and keystore files. Developers are advised to verify publisher identity, watch for sudden download surges, and monitor anomalous network traffic before adding dependencies.