Clipboard Attack: How Malware Swaps the Wallet Address You Copied

You copy the receiving address from your wallet, switch to your exchange window, paste it and confirm the withdrawal. If what is known as a clipper is running on your computer, the address you pasted is no longer the one you copied. It belongs to the attacker, it is technically entirely valid, and your wallet has no reason to reject it. The money is gone as soon as the transaction is confirmed.

This type of attack is old, but over the summer of 2026 it changed in three ways that concern you directly as a holder: the route onto the machine, the operating system, and the question of how much is taken from you at all. This piece explains each of the three using the publications in which they were described, and ends by saying which check actually works.

Clipboard attacks explained: how malware swaps the wallet address you copied

A clipper is a malicious program that monitors the contents of the clipboard and replaces any crypto address it recognises with an address controlled by the attacker. That is the whole idea. Nothing is decrypted, no wallet file is opened, no password is guessed. The attack exploits the one moment in which an address leaves the secure area of your wallet and travels through the operating system as plain text.

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