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Ethereum phishing approval stole $999,999 in USDT, showing how token approvals can drain wallets without private keys. Learn the method and what to monitor.
A crypto user signed a malicious token‑approval on Ethereum that let attackers move $999,999 worth of USDT out of the wallet within seconds, underscoring the growing danger of approval‑phishing scams that bypass private‑key protection【1】.
| At a glance | |
|---|---|
| Loss amount | $999,999 USDT |
| Transaction speed | 36 seconds from approval to full drain |
| Approval type | Unlimited USDT allowance |
| Attack method | Multicall‑bundled token approval |
On‑chain data shows the victim first attempted to transfer a full $1 million, which failed because the wallet balance was $631 short. The attacker then adjusted the request to match the exact balance and succeeded in moving the remaining $999,999 in a single transaction【2】. The approval granted the attacker unrestricted access to the USDT token, allowing the funds to be split into three separate outputs almost instantly. Because the wallet’s private keys were never exposed, typical wallet alerts did not flag the activity【1】.
Token approvals are a standard part of interacting with DeFi contracts, but the permission scope is often hidden from users. Scam Sniffer analysts note that many interfaces emphasize the action being signed rather than the subsequent rights granted, making a single signature enough for an attacker to drain a wallet later【2】. The use of Multicall functions further compressed the theft window, limiting the victim’s chance to revoke the approval before the funds left the address【1】. Recent reports link a 200 % rise in phishing losses this year to a shift toward high‑value wallets, indicating that attackers are targeting larger balances with these tactics【1】.
Security firms advise users to treat every signature request like a bank transfer, verifying the contract address and the exact permission being granted. Regularly revoking unused or unlimited approvals is recommended as a simple mitigation, and some wallet providers have added clearer warnings and approval‑management tools, though no UI change can fully replace careful review【1】.
The incident shows that even without private‑key compromise, a single careless signature can empty a high‑value wallet, highlighting the need for heightened scrutiny of token‑approval requests as phishing tactics become more automated.
Coverage is mostly measured — 104 of 106 reports stay neutral.
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AI-assisted synthesis by the TrendWatcher Editorial Desk · sourced from 3 outlets · Jul 9, 2026 · How we report
More than 130 victims were identified during the June 1‑30 operation.
Authorities intercepted $293 million in illicit assets during the operation.
The FBI’s Internet Crime Report recorded 181,565 crypto complaints with reported losses over $11 billion.
They are often the final step where victims convert cash into scammer‑controlled crypto, making recovery difficult.
The suspects used cross‑chain token swaps to obscure the flow of funds.