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Connect Wallet, Not Your Whole Bag: How to Spot and Kill Approval-Drain Scams

Approval drains don't need your seed phrase. Here's how beginners get cleaned out by a signature and how to stop it.

· 6 min read · Blackhat Empire

The Scam That Doesn't Ask for Your Seed Phrase

Most beginners think the worst thing that can happen is someone getting their seed phrase. So they guard it, write it on paper, never type it anywhere. Good. But then they connect their wallet to a random site, click "Approve," and watch the balance go to zero. No seed phrase involved. No password. Just a signature.

This is an approval drain, and it's one of the most common ways fresh wallets get emptied. Memecoins are extremely high risk and most go to zero on their own, but this is a different problem: losing everything you hold, including the tokens that were actually working, in one click. Learn this now, before your first real position.

What an Approval Actually Is

When you use a token on a decentralized exchange, the site can't just take your tokens. It has to ask your wallet for permission first. That permission is called an allowance, and the transaction that grants it is an approval.

For legit platforms, this is normal and necessary. The problem is what you approve and how much.

  • A limited approval lets a contract spend a specific amount of one token. Normal.
  • An unlimited approval lets a contract spend that token forever, however much you ever hold.
  • A drainer approval is an unlimited approval granted to a contract you don't understand, on a site you didn't mean to be on.

Once that signature goes through, the attacker can move that token whenever they want. You don't get a warning. You don't get a second confirmation. It just leaves.

How Beginners Get Walked Into It

Drainers don't usually look like obvious scams. They look like the thing you were already looking for.

  • A "free mint" or "airdrop claim" page that appears in a group chat or DM.
  • A fake version of a site you already trust, with a slightly different URL.
  • A "wallet verification" or "unlock your rewards" button on a page that has nothing to do with rewards.
  • A token page where the only action available is "Approve to continue" before you can even see anything.
  • A DM from someone offering to "help" you set up, who sends you a link.

The common thread: urgency plus a signature before you've had time to think. That's the tell. If a site wants a signature before it wants to show you anything, close the tab.

The Beginner's Rules

You don't need to be technical to stay safe here. You need a few habits that don't bend.

  • Use a burner wallet for new sites. Keep your main holdings in a separate wallet you never connect to anything unfamiliar. If a burner gets drained, you lose the experiment, not the bag.
  • Read the approval prompt. Your wallet shows what you're signing. If it says unlimited or asks for permission on a token you didn't expect, stop.
  • Never approve a token you didn't choose to interact with. Random tokens showing up in your wallet are not gifts. They're bait.
  • Check the URL character by character. Fake sites rely on you glancing, not reading.
  • No signatures from DMs. Ever. Legitimate teams do not DM you a claim link.
  • Revoke old approvals. Wallets and tools let you review and revoke allowances you no longer use. Do it periodically, especially after trying new sites.

If you're ever unsure whether an approval was safe, treat it as unsafe and revoke it. The cost of revoking is a small transaction fee. The cost of being wrong is the whole position.

Where This Fits in Your DYOR

Approval hygiene is part of the same discipline as checking a token before you buy it. You wouldn't ape into a contract without looking at it, and you shouldn't sign permissions without looking at them either. Our metrics reference walks through what to check on a token's contract and liquidity. The alerts section explains how to read signals without treating them as instructions. And the rules are the non-negotiables that keep you from becoming the exit liquidity.

When you want to actually look at a token's chart and contract before you touch it, do that research on GMGN at gmgn.uk (mirror: gmgn.fr). Look first. Sign later. Or don't sign at all.

Talk It Out Before You Click

Most drains happen because someone acted alone, fast, on a link they didn't question. Slowing down is a skill, and it's easier with people around who'll call out a bad link before you connect.

Our public groups are the place to ask "is this site legit?" before you approve anything: BH GMGN CHAT at @gmgnx_chat for general talk, plus the chain groups BH GMGN SOLANA (@gmgnx_solana), BH GMGN BSC (@gmgnx_bsc), BH GMGN ROBINHOOD (@gmgnx_robin), and BH GMGN BASE (@gmgnx_base). The full channel directory lives at blackhat.finance/channels.html, and you can add the whole setup with the Telegram folder.

The Bottom Line

Your seed phrase isn't the only thing worth protecting. Your signatures are the actual keys to your money in the moment. Treat every approval prompt like a transaction you're about to send, because it is one. Memecoins are high risk and most go to zero. Don't let a drain take the ones that didn't.

Connect deliberately, approve sparingly, revoke regularly. That's the whole game.

Community

Stay connected across the chains:

Charts and on-chain research: https://gmgn.uk.