The Fusaka Paradox: How Ethereum’s Scalability Win Fueled a 612% Surge in "Address Poisoning" Scams

The activation of Ethereum’s Fusaka upgrade on December 3, 2025, marked a monumental leap in blockchain scalability, but it has unexpectedly opened the door to a new wave of cybercrime. By implementing PeerDAS, which expanded blob capacity by eightfold, the upgrade successfully slashed Layer-2 (L2) transaction fees to near-zero levels. While this was a victory for affordable decentralized finance and the adoption of passwordless wallets via passkey support (EIP-7951), these ultra-low costs have also empowered malicious actors. Scammers are now exploiting the nominal transaction fees to automate massive "dust attacks," leading to a staggering 612% increase in address poisoning attempts since the upgrade went live.

Address poisoning is a deceptive tactic where scammers send micro-transfers of less than 0.01 USD in tokens like USDT or USDC from a "lookalike" address to a target's wallet. These fraudulent addresses are designed to mimic the beginning and ending characters of the user’s frequent contacts, effectively "poisoning" their transaction history. The goal is to trick the user into inadvertently copying the scammer’s address from their history for a future high-value transfer. According to Etherscan, this surge has led to over 62 million USD in stolen funds as of early 2026, including a single devastating month in January that saw 12.2 million USD lost to these clipboard-hijacking schemes.

To combat this rising threat, security experts and platforms like Scam Sniffer—which reports a 207% month-over-month spike in signature phishing—are urging users to adopt rigorous on-chain hygiene. Investors should never copy an address directly from their transaction history; instead, they must verify every character of the destination address before confirming a send. Utilizing hardware wallets, maintaining a verified address book, and enabling transaction simulation tools that flag suspicious interactions can provide a critical layer of defense. As Ethereum continues to evolve, staying vigilant against unsolicited "dust" and verifying the integrity of every signature remains the most effective way to navigate the post-Fusaka landscape.