TANZORA NFT Mint Drainer: How a Wallet “Approval” Cost $52,300 — and We Recovered 53%

M.V. never sent anyone his crypto. He signed one transaction to “mint” a TANZORA NFT, and that signature was an approval that let the contract move his assets at will. Wallet drainers do not need your seed phrase — they need one careless click. We recovered 53% by moving on the laundering trail, not the wallet.

Initial Contact

M.V. was active in NFT communities and saw a “TANZORA” mint promoted as an allowlist drop with a countdown. The site looked credible, with real-looking volume and a marketplace. He connected his wallet and approved the mint.

He called us within a day, after his portfolio tracker showed his blue-chip tokens and ETH gone. The signature he approved was not a mint — it was a setApprovalForAll-style grant that handed drain rights to the operator.

Point of Compromise

There was no “hack” of his wallet. The malicious approval let the drainer contract sweep approved assets on the operator’s schedule, across both Ethereum and Polygon. The drop, the countdown, and the marketplace were all set dressing to manufacture a hurried signature.

Within minutes of the approval, the assets were swept and the most liquid tokens were swapped to ETH and bridged. Drainer kits move fast by design.

EXHIBIT A · CLIENT STATEMENT“I have been in crypto for years. I read about drainers and still got caught because there was a timer and everyone in the chat was minting. I approved without reading the signature. One click and it was empty.”

Investigation Log

1. 01
   Revoke and secure

   First action before anything else: revoke the malicious approval and move M.V.’s remaining assets to a fresh wallet so the drainer could not return for more.

2. 02
   Drainer attribution

   We matched the contract and sweep pattern to a known drainer-as-a-service kit, which let us anticipate the laundering route rather than chase it blind.

3. 03
   Bridge and swap tracing

   We followed the swept assets through a DEX swap and a bridge to a set of deposit addresses at two centralized exchanges.

4. 04
   Exchange freeze + filings

   Freeze requests with on-chain evidence to both exchanges, plus IC3 and FBI tip filings referencing the drainer cluster.

5. 05
   Recovery

   One exchange froze a deposit matching our trace and released it; a second returned a partial amount. Bridged funds that reached a non-cooperative venue were lost.

Disposition

Indicators on File

• A wallet signature request for “setApprovalForAll” or unlimited token approval during a “mint.”
• A mint with a countdown timer and chat-driven FOMO.
• A marketplace with volume that cannot be verified on-chain.
• Any prompt to “approve” rather than a simple, fixed-amount mint payment.
• Assets disappearing in a sweep rather than a single transfer you authorised.