EIP-7702 and New Risks for Ethereum Wallets: How a Dangerous Signature Can Expose a Player’s Funds
EIP-7702 became part of Ethereum when the Pectra upgrade activated on 7 May 2025. Its purpose is practical: it lets a standard Ethereum address use selected smart-account functions without moving funds to a newly created wallet. A player may therefore gain simpler token swaps, batched actions, sponsored network fees or limited permissions. The same mechanism, however, changes the meaning of a wallet signature. A deceptive authorisation can attach external code to an address and allow that code to act through the account. By 2026, this is no longer a purely theoretical concern. Malicious EIP-7702 signatures have appeared in wallet-drainer campaigns, including attacks built around fake services, bonus claims and urgent security messages. For anyone who keeps gambling funds, winnings, stablecoins or NFTs in an Ethereum wallet, the central lesson is simple: a request that shows no transfer amount can still create extensive and lasting access.
What EIP-7702 Changed in Ethereum Wallets
Most familiar Ethereum wallets begin as externally owned accounts, often shortened to EOAs. They are controlled by a private key and traditionally contain no executable code of their own. EIP-7702 allows such an account to point to a smart contract known as a delegate. When the authorisation is accepted on-chain, calls involving the wallet can use the delegate’s code while keeping the same public address, balances and private key. The player does not receive a new address, and existing assets do not need to be transferred. This continuity is one reason the feature is useful, but it can also make a harmful change less obvious to the account owner.
Legitimate delegate code can improve everyday wallet use. It may combine an approval and a token swap into one operation, let another party cover the network fee, apply spending limits or create temporary permissions for a game. These functions can reduce repetitive confirmations and give wallet developers more control over account recovery and security policies. EIP-7702 itself is therefore not a vulnerability. The risk depends on which delegate contract receives authority, what that code can do and whether the player understood the request before signing it.
The delegation is persistent rather than limited to the page or session where it was requested. Closing the browser, disconnecting the site or removing the wallet extension from a browser does not erase an authorisation that has already been placed on-chain. The official EIP also states that a delegate may have unrestricted access to the account if it is badly designed or malicious. A valid owner can replace or clear the delegation, but until that happens the attached code may remain available for later calls. This makes EIP-7702 different from a harmless login message that expires after proving control of an address.
Why a Delegation Signature Is More Dangerous Than It Looks
A conventional transaction usually shows a destination, a value and a network fee. An EIP-7702 authorisation may instead appear as a signature request containing a delegate address, chain identifier and account nonce. The request can be signed off-chain, so the player may see no gas charge and no immediate movement of assets. An attacker can then include the signed authorisation in a separate set-code transaction and pay the fee themselves. The absence of a visible transfer is therefore not evidence that the request is safe.
Token approvals and permit signatures are already common phishing tools, but their scope is usually linked to a particular token contract, spender or asset type. A malicious EIP-7702 delegate can be broader because it runs in the context of the wallet address. Depending on its code, it may transfer native ETH, call token contracts, grant new approvals, move NFTs or execute several actions in one sequence. A player who expects to confirm a small bonus claim could unknowingly authorise code capable of handling the account’s entire balance.
The chain setting also matters. An authorisation can be restricted to one chain, or it can use a chain identifier of zero, which is intended for use across compatible chains. A chain-wide authorisation is not automatically harmful, but it creates a larger exposure if the delegate is malicious and the account conditions match on several networks. Players who use the same address on multiple EIP-7702-compatible EVM networks should not assume that an incident is confined to the chain shown by the phishing page. Each network should be checked separately after a suspicious signature.
How Players Can Be Targeted Through Casino-Themed Phishing
Casino-related phishing often begins with a believable reason to connect a wallet. A copied casino site may advertise a refund, loyalty reward, NFT pass, tournament prize, account verification or unusually large no-deposit bonus. Attackers also use fake support profiles, private messages and sponsored search results that imitate a known operator. The page may display the player’s public address and balance correctly, which creates a false sense of legitimacy because this information is publicly available on-chain. The dangerous step comes later, when the player is told to sign a message to confirm eligibility, secure the account or activate a faster withdrawal.
A typical EIP-7702 attack can happen in two stages. First, the fake page asks for an authorisation that points the wallet to attacker-controlled delegate code. The text shown to the player may describe the action as a login, account update, smart-wallet activation or gas-saving feature. Second, the attacker submits that authorisation in a set-code transaction and calls the delegated account. The drain may happen immediately, or the code may wait until the wallet receives more valuable assets. Because the attacker can sponsor the transaction fee, the victim does not always need to hold ETH at the exact moment the signature is collected.
Evidence published in early 2026 shows that the threat moved into real wallet-drainer activity after Pectra. Scam Sniffer’s review of 2025 recorded total EVM wallet-drainer losses of approximately $83.85 million across 106,106 victims. Most of that figure involved other signature types, especially Permit, so it should not be presented as an EIP-7702 loss total. The same report nevertheless identified malicious EIP-7702 signatures after the upgrade and noted two large August cases with combined losses of about $2.54 million. The figures show why players should treat unfamiliar delegation requests as a current security issue rather than a remote future possibility.
What Malicious Delegate Code Can Do After Activation
Once a harmful delegate is active, it can make calls as the player’s address within the limits of its programming. It may send ETH, approve an attacker to spend ERC-20 tokens, transfer approved assets, interact with NFT contracts or bundle several operations into one transaction. The code may also target assets that were not visible on the phishing page. A request presented as a claim for one token can therefore affect stablecoins, casino balances held in tokens, collectible passes and other holdings stored at the same address.
Persistence creates a second risk: delayed theft. A player may sign the authorisation while the wallet is nearly empty and assume nothing happened. If the delegate remains active, later deposits or withdrawals from an online casino can become targets. Automated code can watch the address and attempt to move new funds soon after they arrive. This is why a wallet that appears safe immediately after a suspicious signature should not be reused until its delegation status has been checked and corrected.
An EIP-7702 compromise does not necessarily reveal the seed phrase or private key. It also does not automatically give access to every other address created from the same recovery phrase. Those distinctions matter when assessing the incident. At the same time, they do not make the affected account safe: malicious delegate code can still exercise extensive control over that address. Legitimate smart-account delegates are also not equivalent to drainers. The correct question is not whether EIP-7702 appears in the prompt, but who controls the delegate contract, whether the wallet recognises it and what permissions the code actually grants.
Practical Protection Before and After Signing
The strongest everyday safeguard is separation of funds. A player should keep long-term ETH, stablecoins and valuable NFTs in a savings wallet that is never connected to casino sites, bonus pages or unfamiliar applications. A different wallet can be used for deposits and withdrawals, with only the amount needed for the current session. This arrangement cannot prevent a bad signature, but it places a clear limit on the immediate loss. A hardware wallet may improve key protection, yet it cannot make a malicious authorisation safe when the owner confirms it without understanding the details.
Before signing, check both the site and the wallet prompt. Open the casino from a saved bookmark or a manually verified address rather than a search advert, private message or shortened link. A normal deposit to a custodial online casino should usually require a transfer to the operator’s stated deposit address; it should not require the player to upgrade an Ethereum account, assign delegate code or enable a smart account through an unrelated contract. An on-chain casino may require contract interactions, but the contract address and purpose should match information published through the operator’s verified channels.
Wallet prompts deserve the same attention as withdrawal details. Reject requests that mention an unknown delegate, set-code action, account upgrade, authorisation list or cross-chain permission without a clear reason. Check whether the wallet identifies the delegate as trusted and whether transaction simulation shows token approvals, transfers or unexpected calls. Keep the wallet software current because support for human-readable warnings and simulations continues to improve. Token-approval checkers remain useful, but they are not a complete EIP-7702 defence; delegation status must also be reviewed.
Response Steps for a Suspected EIP-7702 Compromise
Disconnecting the phishing site is not enough after a suspicious authorisation. Move liquid assets to a fresh wallet as soon as this can be done safely, starting with holdings that can be transferred without granting new approvals. Then use a trusted wallet function or verified recovery method to replace or clear the EIP-7702 delegation. Under the specification, delegating to the zero address clears the indicator, but most users should rely on a reputable wallet interface rather than constructing this transaction manually. If the wallet does not support clear recovery steps, contact its official support channel from the vendor’s verified site.
Check every EVM network on which the address has been used, especially when the original request may have used a chain identifier of zero. Revoke suspicious token allowances, NFT operator approvals and Permit2 permissions as separate actions because clearing delegate code does not automatically remove approvals already granted to third parties. Do not send new casino withdrawals to the affected address until all checks are complete. If rapid draining continues or the account behaviour is unclear, retire the address and use a newly created wallet whose recovery phrase has never been entered into the compromised device or page.
Keep transaction hashes, screenshots, domain names, delegate addresses and support messages for later reporting. Notify the genuine casino if its name or design was copied, report the phishing domain to the wallet vendor and submit relevant addresses to recognised blockchain-security services. Operators can reduce risk by publishing verified deposit instructions, warning players that support staff never request seed phrases or unexplained smart-account upgrades, and keeping official contract addresses easy to verify. Wallet developers also have a central role: the EIP’s own guidance says applications should not be allowed to present arbitrary delegate authorisations without wallet-level review, because ordinary users cannot reasonably audit the code themselves.