Key topics of the post:

• DApps are blockchain-based applications with backends powered by smart contracts that enable decentralized interactions with cryptocurrencies, without intermediaries.

• The DApp landscape offers unprecedented utility and has enormous potential, but it can also expose users to risks. Common scamming tactics in this space include social engineering, approval phishing, signature phishing, and fake blockchain rectification sites targeting users' wallets.

• Protect yourself by verifying DApps, understanding permissions before approving, using Binance Wallet's security features, and never sharing your seed phrase or private keys.

In decentralized applications (DApps), you are in control – but you are also the last line of defense. From DeFi protocols and NFT marketplaces to blockchain-based games, DApps allow you to lend assets, trade, and play with cryptocurrencies without the need for intermediaries.

But, without customer support and with smart contracts managing every action, there often isn’t an undo button after approving a transaction or signing a message.

In this guide, we will help you navigate DApps safely and confidently – from identifying risky permissions to managing token approvals – so you can explore Web3 without losing sleep (or your funds).

What are DApps?

A decentralized application (DApp) is an application that operates on a blockchain network like Ethereum or BNB Chain, rather than relying on centralized servers. Think of it as an application with a public, transparent, and immutable backend powered by smart contracts.

In Binance Wallet, you can connect to DApps via QR code, browse or search on the [Discover] page, or tap on verified DApps in the wallet.

DApp dangers

The open nature of Web3 means anyone can deploy a smart contract or create a DApp interface. Scammers have exploited this freedom and the lack of centralized client support by creating 'fake DApps' that closely mimic legitimate ones. These malicious apps are carefully developed to deceive users into signing risky messages or approving harmful transactions, thereby putting their assets at risk.

Social engineering

Social engineering is one of the most common ways scammers trick users into connecting their wallets to malicious DApps. Instead of relying solely on technical exploits, these scammers manipulate human psychology — exploiting emotions like fear, curiosity, and urgency to override common sense. Here’s how a social engineering attack typically unfolds.

Impersonation: scammers often pose as official representatives of trusted platforms or projects. They mimic logos, adopt convincing usernames, and even clone entire community groups on Telegram, Discord, or Twitter to appear legitimate.

Building trust: in private messages or within these groups, scammers will attempt to engage users in friendly conversations or offer unsolicited 'help', slowly building a relationship to gain trust.

FOMO and promises of 'get-rich-quick': once a basic level of trust is established, scammers waste no time creating a sense of urgency. They will promote a limited-time opportunity – such as an 'exclusive pre-sale', 'airdrop', or 'easy access' to a 'high-yield DApp'. Potential victims are pressured to act quickly and interact with the malicious DApp or risk missing out on the opportunity.

The trap: but the only ones getting rich are the scammers. These DApps are often designed to empty wallets the moment an approval message is signed or to grant the scammer permanent access to your funds without your knowledge.

How signing without reading what you are signing can lead to losses

1. Approval phishing

In DeFi, approvals are a normal part of interacting with smart contracts – they allow a DApp to move your tokens on your behalf. In approval phishing, malicious DApps abuse this feature by asking users to approve exceptionally high or unlimited token spending.

Once approval is granted, scammers utilize smart contract functions, such as transferFrom(), or perform multiple batch token withdrawals using multicall(), draining your wallet over time. Since approvals remain active until revoked manually or until the set fund limit is reached, the scammer can continue accessing your wallet, draining the approved tokens long after the initial interaction.

2. Signature phishing

Signature phishing usually involves tricking users into signing arbitrary or unreadable data using methods like Permit, Permit 2, or eth_sign. Unlike a normal transaction on the blockchain, these signatures occur off-chain, so there is no gas fee, blockchain record, or immediate alert. Once a valid signature is created, scammers can use it in a smart contract to gain access to move your tokens – sometimes enabling transfers or granting broad permissions without you noticing.

A common example of this scam uses Permit and Permit2 – legitimate off-chain approval methods developed to simplify interactions with DApps.

• Permit allows users to approve token movements via signature instead of an approval transaction on the blockchain.

• Permit2 extends this functionality by allowing a single signature to approve multiple tokens, with customizable limits and expiration settings.

Although these tools are convenient, scammers use them to disguise malicious Permit or Permit2 requests as harmless prompts. If a victim signs one of these requests, the scammer can use that signature later to withdraw funds – sometimes long after the interaction. Since no transaction is broadcast when the signature is created, the breach often goes unnoticed until tokens are lost.

Permission-based scams are particularly dangerous because a single compromised signature can unlock access to multiple tokens, depending on what you previously permitted. Always double-check what you are signing – if it is unreadable or does not make sense, do not sign.

Blockchain rectification scams

Blockchain rectification is a type of scam that takes advantage of inexperienced Web3 users. These fraudulent sites claim to fix common wallet issues, such as slippage errors or failed transactions, but are actually designed to steal your seed phrase or private keys. Here’s how this scam typically unfolds.

The target is frustrated users: scammers take advantage of users stressed by errors such as wallet migration issues and slippage, offering false 'quick fix' solutions that promise easy resolutions.

Imitation: these sites can copy the appearance of trusted services, using clear designs or nearly identical interfaces to divert users' attention.

Error simulation: upon accessing the site, users encounter fake error messages created to seem urgent and legitimate. They are then prompted to 'connect manually' and tricked into entering their seed phrase or importing their private key – giving scammers full access to the wallet, allowing them to drain the funds.

How to protect yourself

Take warnings seriously

Binance Wallet has built-in protections, such as transaction simulations and signature filters, to help keep your assets secure. It also blocks approvals for externally owned accounts (EOAs), high-risk requests like eth_sign, and known malicious DApps. But ultimately, it is still you who makes the final decision. Always read and pay attention to wallet warnings before confirming a transaction or signing a message.

Smart approval practices

Never sign or approve requests without verifying. Understand exactly what permissions a DApp is requesting – especially regarding token approvals.

• Avoid unlimited permission: always grant the minimum amount necessary instead of unlimited access to the token. This limits potential damage if a DApp is malicious.

• Revoke old approvals: make this a habit by periodically accessing the [Assets] > [Approvals] tab in your wallet to revoke any token approvals you no longer need.

• Disconnect unused DApps: in [More] > [Connected DApps], remove access for DApps that you no longer use. Keeping them connected increases risks.

Simulation reviews

Use a wallet with an integrated simulation function, such as Binance Wallet. The simulation helps predict what will happen before a transaction is actually sent to the blockchain. It’s like getting a preview of the outcome – allowing you to identify errors or scams before they become costly.

For simple wallet-to-wallet transfers, simulations help identify suspicious addresses or possible errors, such as sending to a known scam destination. When interacting with smart contracts – during swaps, staking, or other actions in the DeFi sector – Binance Wallet performs simulations to show the expected amount of tokens, values, and potential risks. This provides a clear view of the information before you confirm the transaction.

Always do your own research (DYOR)

Before interacting with any DApp, take the time to evaluate it carefully. Legitimate projects are often audited by independent security firms, and these reports are often available on the project's official website. Investigate the team behind the project – if they are anonymous or hard to verify, that may be a red flag. Also consider the community. A solid, engaged, and transparent user base is generally a good sign, while a lack of activity or vague responses may indicate underlying risks.

Trust official sources

When accessing any DApp, always start with verified links from the project's official website or trusted platforms like CoinMarketCap. Scammers often create fake sites by subtly altering domain names or replacing similar characters, which can be hard to spot at first glance (e.g., uniswap.com versus unίswap.com). Avoid clicking on search ads, as phishing sites often pay to appear at the top of the results. For added security, type the URL manually instead of clicking on ads or pasting links provided by third parties.

Never share your seed phrase or private key

If someone asks for your seed phrase or private key, stop immediately – you are being scammed. No legitimate DApp, service, or support agent will ask for this information. The moment you share it, your wallet will be empty in the next instant. Close the tab, walk away, and don’t look back.

Educate yourself and stay informed

Knowledge is your first line of defense in the Web3 space. Understanding common scams and knowing smart approval practices is essential for protecting yourself. Stay informed about the latest threats by following reliable sources such as Binance Academy, our Know the Scams series, and the security series. These resources will help you stay ahead of emerging scams, enabling informed decision-making to protect your assets.

Final considerations

The world of DApps is rich in innovation and possibilities. Whether using DeFi tools, exploring NFTs, or getting to know a new blockchain-based game, there are countless things to discover.

Even a well-built house with secure locks becomes useless if you leave the door open or lose the keys. Binance Wallet offers advanced security features – from simulations and scam alerts to restricted approvals – but it still relies on you to use them wisely. Approvals, signatures, and connections with DApps are part of everyday life in Web3, and understanding them is essential to protect your funds. If something feels off, stop, verify, and don’t rush. Web3 rewards those who stay vigilant and ask questions. With the right habits and a healthy dose of caution, you can explore confidently while keeping your cryptocurrencies SAFU.

Further reading

• Web3 Wallet Security – Stay SAFU with Binance's MPC wallet

• Between scams and fraud: how QR code and facial recognition scams work

• USDC arrives on Wall Street – what Circle's debut means for the cryptocurrency market