Synthetix is a widely used Perps service on Optimism, which makes it a favorite target for phishing. This post breaks down exactly how Synthetix scams work so you can recognize them instantly.
Step 1: the bait
It starts with a link — an ad at the top of search results, a reply from a fake support account, or a message in a group chat. The link points to a domain that looks like synthetix.io but is not it: extra words, swapped letters, or an unusual ending.
Step 2: the perfect copy
The fake Synthetix page is a pixel-perfect clone. Everything looks right, so you connect your wallet without a second thought. This is where the trap closes.
Step 3: the malicious signature
Instead of a normal connection, the site asks you to sign a transaction or approval. On a real Synthetix this might be routine — on the clone it is a drainer that grants the attacker permission to move your tokens or NFTs. Once you approve, your assets are gone.
The Synthetix phishing checklist
- Confirm the domain is exactly synthetix.io — nothing more, nothing less.
- Never reach Synthetix through an ad or a link someone sent you.
- Read every signature request. Reject anything granting broad or unlimited access.
- Never enter your seed phrase — Synthetix will never ask for it.
- If connecting via WalletConnect, verify the request matches the real site.
How Trust Line protects you on Synthetix
Trust Line blocks known Synthetix phishing clones before they load, and on any site it decodes the signature you are about to make — warning you in plain language if it is a drainer, before you approve.