The coordinated DNS hijacking campaign that compromised Compound Labs, Pendle, and other DeFi platforms through Squarespace on July 12, 2024, demonstrated that sophisticated attackers are increasingly targeting the web infrastructure layer rather than smart contracts. For experienced crypto users and developers, this incident demands a comprehensive reassessment of frontend security practices. Bitcoin was trading at $57,900 and Ethereum at $3,134, meaning the financial stakes of a successful DNS redirect were substantial. This tutorial provides an advanced, technical walkthrough for protecting yourself and your projects from DNS-based attacks.
The Objective
The goal is to establish multiple independent verification layers that make DNS hijacking insufficient for stealing funds, even if the attacker successfully redirects a domain. This means implementing defense-in-depth at the browser level, the wallet level, and the protocol level. By the end of this walkthrough, you will have a hardened setup that can detect and prevent DNS-based attacks regardless of which layer is compromised.
Prerequisites
This tutorial assumes you are comfortable with browser developer tools, command-line interfaces, and basic networking concepts. You will need a hardware wallet with a built-in display, a browser that supports extensions such as Firefox or Chrome, and access to a DNS lookup tool like dig or nslookup. Familiarity with ENS domain resolution and IPFS content addressing is helpful but not required.
Step-by-Step Walkthrough
Step one: Configure DNS-over-HTTPS in your browser. This prevents attackers on your local network from intercepting DNS queries and redirecting you to malicious servers. In Firefox, navigate to Settings, Privacy and Security, and enable DNS over HTTPS with a trusted resolver like Cloudflare or Google. In Chrome, enable the Use secure DNS option under Privacy and Security settings. Step two: Install the ENS extension or use ENS-compatible wallets to resolve protocol addresses through the Ethereum Name Service rather than traditional DNS. ENS records are stored on-chain and cannot be hijacked through domain registrar vulnerabilities. Step three: Before connecting your wallet to any DeFi protocol, verify the contract address independently. Use block explorers like Etherscan to confirm that the contract address displayed on the website matches the canonical address listed on the protocol’s GitHub repository or official documentation. Step four: Configure your hardware wallet to display full transaction details including the destination address and exact token amounts. Always verify these details on the hardware wallet screen, not on the website. Step five: For developers, deploy your frontend to IPFS or another content-addressed storage system and use ENS to resolve the content hash. This makes your frontend tamper-proof regardless of DNS status.
Troubleshooting
If you encounter a situation where a DeFi platform’s domain appears to be compromised, do not panic. First, disconnect your wallet immediately by locking it in your browser extension or unplugging your hardware wallet. Check the protocol’s official social media channels for confirmed statements about the incident. Use Etherscan to interact with the protocol’s smart contracts directly if you need to perform urgent actions like withdrawing funds. If you have already connected to a potentially compromised site, review your recent token approvals on Etherscan and revoke any suspicious permissions using tools like Revoke.cash or the Etherscan token approval checker. Monitor your wallet for any unauthorized outgoing transactions and report any losses to the appropriate authorities and the protocol team.
Mastering the Skill
Advanced DNS security is an ongoing practice, not a one-time setup. Develop the habit of verifying contract addresses before every significant interaction, even on platforms you use regularly. Set up DNS monitoring alerts for domains you control using services like Cloudflare Radar or specialized monitoring tools. For protocol developers, implement address book features in your dApp that display the expected contract addresses and flag any discrepancies. Consider using multi-signature wallets for large holdings, which require approval from multiple devices or signers before executing transactions. The Squarespace incident was a warning — the next DNS-based attack could be more sophisticated and harder to detect. Build your defenses now before the next wave arrives.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Always conduct your own research before making investment decisions.
the transaction simulation step is underrated. if every wallet forced simulation before signing, phishing success rates would crater
simulation catches 80% of attacks but the 20% it misses are the sophisticated ones that manipulate the simulation output itself. defense in depth, not silver bullets
forced simulation should be default in every wallet. metamask adding it was a step but most people skip the preview
the EIP-712 domain separator section is solid. most protocols set it once and forget it but it should be verified on every single transaction that crosses a domain boundary
bookmarked. been looking for a proper EIP-712 domain separator checklist, this is better than anything i found on the solidity subs
the Compound DNS hijack via Squarespace was embarrassing. registrar lock and DNSSEC should be table stakes for any DeFi protocol
Squarespace specifically got hit because they acquired google domains and the DNSSEC records werent migrated properly. protocol teams should never have been on that platform to begin with