PasteGuard.

How a fake bonus steals your crypto.

A real campaign promised 25% extra on a crypto swap. It asked people to install a browser script that quietly changed who got paid.

Inspect the example
01 The fake bonus screen
A fake loyalty bonus prompt injected into a cryptocurrency exchange page
Screenshot from the campaign investigation Cisco Talos
  1. The bait

    A Pastebin comment claims to have found a way to get extra crypto on a swap.

  2. The install

    It tells you to paste code into Tampermonkey, a browser extension that can run scripts and change web pages.

  3. The wallet swap

    The code replaces the exchange’s deposit address with one the attacker controls. Your payment goes wherever that address points.

Script workbench

Paste a script or scan our reconstruction to see which lines can change a payment.

Scans stay on this device
Pasted code stays here.

Findings

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    A clean scan can miss hidden behavior.

    Follow the payment

    Compare an independently verified recipient with the address found in the code.

    Solana devnet
    Demo baseline
    Use a wallet address verified outside the script.
    Source evidence

    Both previews use 0.01 SOL. Devnet receives unsigned transfer messages, and nothing is broadcast.

    The scam files

    Four documented attacks. Each file pairs the original evidence with a safe example to scan.

    01Fake swap bonus
    Fake loyalty bonus dialog injected into a Bitcoin swap page

    The loyalty bonus trap

    A Pastebin comment promised higher swap payouts. The userscript changed the wallet address and showed a fake bonus.

    See the Pastebin lurePastebin comment claiming to have leaked an exploit, with the link redacted
    02Clipboard hijack
    Phishing site offering a free Solana sniper and trading bot download

    The free Solana sniper

    A fake trading tool used inflated social proof to spread a desktop program that replaced wallet addresses on the clipboard.

    03Fake compiler
    Video tutorial showing a fake compiler alongside a MetaMask transaction prompt

    The AI arbitrage bot

    A tutorial sent viewers to a fake Solidity compiler. It deployed different bytecode that forwarded their ETH.

    04Recovery phishing
    Phishing window in a fake Ledger app asking for wallet recovery words

    The wallet “security check”

    A fake Ledger app prompted users to verify their recovery phrases and sent the entered words to an attacker.