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Malware

Clipboard hijacking

Malware that swaps the address you copied for one belonging to somebody else.

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Updated 2026-08-305 min read
The short answer

Malware that swaps the address you copied for one belonging to somebody else. A clipper is malware that watches the clipboard for anything shaped like a crypto address and silently replaces it with the attacker’s. You copy your own address, you paste it, and the characters are different. Because nobody reads a 42 character string, the transaction goes out to a stranger.

What it is

A clipper is malware that watches the clipboard for anything shaped like a crypto address and silently replaces it with the attacker’s. You copy your own address, you paste it, and the characters are different. Because nobody reads a 42 character string, the transaction goes out to a stranger.

How it plays out

  1. It arrives with something else

    A pirated program, a fake wallet installer, a browser extension, or a file from a chat.

  2. It watches quietly

    Doing nothing visible until an address hits the clipboard.

  3. It substitutes

    Sometimes matching the first and last characters of the real address, which is exactly the part people check.

  4. The transaction confirms

    And it is final.

What gives it away

  • A pasted address that does not match what you copied.
  • Software installed from anywhere other than the official source.
  • Browser extensions you do not remember adding.

How to not be caught by it

  • Check the full address after pasting, not just the ends. Middle characters too.
  • Send a small test transaction first for anything that matters.
  • Use a name service so you send to a readable name instead of a string.
  • Confirm the address on the hardware wallet screen, which malware cannot alter.
  • Install software only from official sources, and audit your browser extensions.
The hard part is not technical
None of these require technical skill to avoid. They require doing the boring check at the exact moment you feel most rushed, which is the whole difficulty.

If it already happened

  • If a transaction already went out, it cannot be reversed.
  • Treat the machine as compromised and rebuild it.
  • Move funds from any wallet whose keys were on that machine, from a clean device.
  • Check every saved address in your wallet, since some clippers rewrite the address book.
Recovery scams
Anybody who contacts you offering to recover lost crypto for a fee is running the second scam on the same victim. There is no recovery service that can reverse a blockchain transaction, because nobody can. Report it through official channels and ignore everyone else.

Common questions

How common is clipboard hijacking?

Common enough that it has a name and a playbook. The specific numbers move constantly, so rather than quote a figure that will be wrong next quarter: assume you will meet this one, and set your wallet up so meeting it is survivable.

Can the money be recovered?

Once a blockchain transaction confirms, no. What reporting can occasionally do is get funds frozen at the exchange where a thief tries to cash out, which is why reporting quickly is worth doing even when it feels pointless.

Does a hardware wallet stop this?

It stops anything that needs your keys, because the keys never leave the device. It does not stop you approving a malicious transaction on the device itself, so read what the screen says before you press confirm.

Where to go next

All attacksThe full list, side by side.Security checklistDo the fixes in order.Self custodyHolding your own keys properly.

Check your setup before you need to

An hour on a screen share, going through your wallets, your approvals, your backups and your recovery plan. You click everything and we never ask for keys.

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