U.S. Secret Service Analysts Work with Canadian Officials to Disrupt Ethereum Blockchain “Approval Phishing” Scam

Why did the scammer cross the blockchain?

To get to your wallet on the other side.

In this publication, we’re exposing a sneaky crypto scam targeting Ethereum wallets—one so dangerous that it triggered a cross-border sting dubbed Operation Avalanche. If you or someone you know holds crypto, pay attention—this one's a wallet-drainer.

Scammers are using slick tactics to trick you into opening your digital wallet—and then cleaning it out.

In a growing scheme called “approval phishing,” criminals are luring people into granting invisible access to their Ethereum wallets. Once approved, the scammers drain the funds without the victim even realizing it—until it’s too late.


How the Scam Works:

  1. Trust the scammer, not the system. Victims are often contacted via fake investment platforms, apps, or even social media.
  2. Sign here—nothing to worry about. The victim unknowingly signs a smart contract giving scammers permission to move funds.
  3. Wallet drained silently. Because the victim approved the transaction, scammers don’t need private keys to siphon off assets.
  4. Often tied to “Pig Butchering.” Victims are emotionally manipulated over weeks or months, convinced they’re investing in a booming crypto project.


Who’s Being Targeted:

This scam isn’t just hitting hardcore crypto traders—it's targeting:

  • New crypto investors unfamiliar with Web3 wallet permissions
  • Victims of online relationship or investment scams
  • Canadians and Americans across multiple regions

Authorities have confirmed wallet thefts totaling $4.3 million already.


Real-Life Example:

During Operation Avalanche, analysts from the U.S. Secret Service Washington Field Office worked with Canadian authorities to trace and identify compromised Ethereum wallets. Victims were then contacted and warned before even more funds disappeared.

“We will continue working with Canadian law enforcement and financial partners to identify and seize stolen assets to return to victims,” said WFO Special Agent in Charge Matt McCool.


Why You Should Care:

Because you could lose everything in your crypto wallet—without anyone hacking your password. It’s that subtle.

  • Scammers don’t need your login info—they just need your permission.
  • Crypto platforms often can’t reverse these transactions.
  • Once your wallet is approved, it’s like handing out a blank check—and not knowing who took it.


How to Protect Yourself:

  • Double-check smart contract approvals. Don’t sign any Web3 transaction you don’t fully understand.
  • Use a wallet permissions checker. Tools like Etherscan’s Token Approval Checker can show who’s got access.
  • Revoke suspicious approvals immediately. If something looks off, cut off the permissions fast.
  • Avoid unsolicited links or DApps. Never connect your wallet to unknown platforms, even if they look legit.
  • Be skeptical of “investment advisors” online. Especially if they slide into your DMs promising high returns.


Quick Tips & Updates:

Quick Tip #1: Did you know? You can grant someone access to your crypto wallet without even realizing it—just by clicking “Approve” on a smart contract.

Pro Tip: Bookmark and regularly check tools like revoke.cash to review and revoke token allowances from sketchy contracts.


Stay safe, stay informed.

 

Keywords Defined:

  • Approval Phishing: A scam where users are tricked into approving token transactions that allow scammers to withdraw funds from their wallet.
  • Pig Butchering: A long-con scam where victims are emotionally manipulated into making large financial investments in fake platforms.
  • Smart Contract: A self-executing contract on the blockchain; when “approved,” it can automatically trigger transactions.
  • Tokenomics: The structure and function of how a cryptocurrency or token works, including its supply, distribution, and access.
  • Web3 Wallet: A digital wallet used to interact with decentralized applications (DApps), such as MetaMask or Trust Wallet.

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