Rabby Wallet Download: The Post-Hack Recovery Checklist—Revoking Approvals and Restoring Trust in Your Portfolio

A user approves a token swap on what appears to be a legitimate decentralized exchange. Minutes later, their wallet is empty. The culprit was not a stolen private key, but an unlimited token approval granted to a malicious contract address. The funds were transferred through a pathway the user never explicitly authorized, yet the blockchain recorded every step as valid. Recovering from this scenario requires understanding how approvals work, identifying which ones are still active, and systematically removing access to your assets before moving forward. That recovery workflow is where a wallet’s design becomes consequential: a tool that can decode approvals, simulate transactions, and provide clear visibility into active permissions can be the difference between a contained loss and a recurring compromise.

Rabby Wallet, developed by the DeBank team and available as a free, open-source self-custody wallet for Ethereum and more than 90 EVM-compatible chains, includes built-in approval management and transaction simulation features specifically designed to prevent and mitigate this class of attack. If you have interacted with a malicious dapp or noticed unexpected token movements, the recovery process begins with the right tool and a systematic approach. This article outlines the step-by-step protocol for auditing your token approvals, revoking access where needed, and restoring confidence in your portfolio using Rabby’s native features.

Why token approvals become a liability after a malicious interaction

The ERC-20 standard, which governs token transfers on Ethereum and EVM chains, separates ownership from spending authority. When you approve a smart contract, you are not sending your tokens; you are granting that contract permission to transfer them on your behalf up to a specified limit. This design enables decentralized applications to execute transactions without repeatedly asking for your private key. It is also the mechanism that makes unlimited approvals possible—and dangerous.

An attacker who gains control of a contract address you have approved can drain your tokens up to the approval limit. If you approved USDC to an address you thought was a legitimate DEX, but the address was actually controlled by a scammer, that approver can extract your USDC balance at any time. The blockchain shows the transfer as valid because the approval was genuine; your signature authorized it. The key vulnerability is not in the approval mechanism itself, but in the human decision to grant access without understanding the recipient or setting limits.

Recovery begins with a harsh reality: you cannot undo an approval by simply revoking it. The tokens that left your wallet are gone unless the attacker chooses to return them—a rare outcome. What you can do is stop the bleeding by identifying all active approvals, revoking those that no longer serve a legitimate purpose, and preventing the same address from draining additional funds. This is where Rabby’s approval management becomes essential. Rather than navigating block explorers and decoding contract calls, the wallet displays your active token approvals in a human-readable format, shows which contracts hold access, and lets you revoke them directly.

The immediate audit: Finding all active token approvals in Rabby Wallet

Begin by opening your wallet and navigating to the approvals or permissions section. Rabby displays a list of all active token approvals across the connected chains, organized by token and approved address. Do not assume this list is short. A user who has interacted with multiple dapps over months or years may have dozens of approvals, many of which are obsolete. The goal of this audit is to identify three categories: approvals to legitimate, active services that you continue to use; approvals to services you have abandoned; and approvals to addresses that you do not recognize.

For each approval, note the token, the approved address, and the amount. If the amount is listed as “unlimited” or “∞,” that approval can extract your entire balance of that token. Approve only the amount you intend to spend in a single transaction or an amount you are comfortable losing. For recurring services such as lending protocols or yield farms, an approval may be necessary and intentional. Document which of these are active and which you have since stopped using.

The address checker tool available within Rabby can help validate whether an approved address is what it claims to be. Paste the approved contract address into the address checker and review the result. A legitimate protocol address should match the official documentation of that protocol. If the address does not match, if the protocol name is misspelled, or if the checker flags it as a known scam contract, you have found an active approval that poses immediate risk.

Once you have completed your audit, categorize the approvals. Create a mental or written list of addresses that must be revoked immediately because they are unrecognized, belong to dapps you no longer use, or have been flagged by the address checker. These are your revocation targets. Approvals to active, legitimate services can be evaluated separately; you may choose to revoke and re-approve them with a lower limit, or leave them active if you use the service frequently.

Revoking approvals and managing approval limits

To revoke an approval in Rabby Wallet, select the token and address combination you want to remove and confirm the revocation transaction. The wallet will simulate the revocation and display any warnings before you sign. Pay attention to these warnings: they may indicate network congestion, unusual gas prices, or issues with the transaction structure. Once you have confirmed the transaction, your wallet will broadcast the revocation to the blockchain. Revocation transactions require gas fees just like any other on-chain action; you will need ETH or native tokens for the chain you are using.

The revocation process is straightforward, but the timing and sequencing matter. If you are revoking many approvals at once, consider doing so over several transactions rather than attempting to batch all revocations together. This approach reduces the risk of a single failed transaction disrupting your recovery workflow. It also gives you time to verify each revocation has been confirmed on-chain before proceeding to the next one.

For approvals you want to keep but with a lower limit, Rabby allows you to adjust the approval amount. Rather than revoking and re-approving separately, you can modify the limit in place, which may use less gas and reduce transaction complexity. For a service you use regularly, such as a DEX you trade on weekly, you might approve a moderate amount—perhaps enough for two to three typical transactions—rather than an unlimited approval. This strategy balances convenience with risk: you avoid re-approving constantly, but you also limit the damage if that particular address becomes compromised.

Some protocols support the EIP-2612 Permit standard, which allows you to grant approval through a signature rather than a separate transaction. These approval signatures do not require gas and do not create an on-chain approval record until the permit is actually used. If a dapp offers a permit-based approval, it can be safer than a traditional ERC-20 approval because no permanent approval record is created on the blockchain. Rabby can decode permit signatures and display their contents, so you understand what you are signing even if the dapp interface is unclear.

Transaction simulation and risk alerts: Preventing the next mistake

Once you have revoked the dangerous approvals, you need a system to prevent the same situation from recurring. This is where Rabby’s transaction simulation feature becomes your primary defense. Before signing any transaction, Rabby analyzes the contract interaction and displays a clear warning if it detects that you are about to approve an unusually high amount, interact with a flagged address, or approve a token to an address you have never approved before.

The simulation process works by running the transaction through a local environment before you sign it. If the transaction would transfer tokens to an unknown address, swap tokens at an unfavorable rate, or approve access to your funds, Rabby highlights these risks in plain language. A user who has been burned by a malicious dapp should pay close attention to these warnings; they are the second line of defense after your own critical thinking about which dapps you trust.

Not every simulation warning means you should cancel the transaction. You may genuinely be approving a new service for the first time, in which case the “new approval” warning is expected. The key is that you are seeing the warning and acknowledging it consciously, rather than clicking through a dapp’s interface on autopilot. Before approving, ask yourself: Do I recognize this address? Does it match the official documentation of the protocol I am trying to use? Am I approving a reasonable amount or unlimited access? Taking a ten-second pause to answer these questions can prevent a catastrophic loss.

The approval decoding feature in Rabby also displays the details of what you are about to sign in human-readable form. Rather than a string of hex characters, you see the function name, the token address, the approved address, and the amount. This clarity is especially valuable when you are using a hardware wallet with Rabby, since hardware wallets typically display approval transactions as unintelligible hex data. By reviewing the decoded information in Rabby before you sign on your hardware device, you can verify that what you are about to approve is exactly what you intended.

Rebuilding trust: Which approvals to restore and when

After you have revoked the malicious or unnecessary approvals, you may need to re-approve certain addresses to resume normal wallet activity. If you use a DEX regularly, a lending protocol, or a yield farm, you will need to grant approval again to continue using these services. The question is: how much should you approve, and how often should you refresh these approvals?

For a DEX that you use episodically, approval for the amount of a single transaction or a small multiple of that amount is reasonable. If you typically swap $1,000 at a time, approving $2,500 or $5,000 gives you flexibility for a few transactions without requiring another approval, yet caps the damage if that specific dapp’s contract is compromised. For a lending protocol where you deposit and withdraw regularly, an approval equivalent to your deposit amount, plus a buffer for interest or gains, is prudent.

Some users prefer to revoke approvals after each use, treating the approval-execute-revoke cycle as a standard workflow. This approach maximizes security but comes at a cost: three transactions instead of one, which means more gas fees and more interaction with your wallet. For smaller accounts or less frequent traders, this workflow may not be practical. For larger accounts or users who have just recovered from a compromise, it may be justified.

When you re-approve services after recovery, use Rabby’s simulation feature on every approval transaction, even those you have made before. A dapp’s contract address should not change, but phishing sites and compromised frontend pages sometimes serve approval requests to unexpected addresses. By running the simulation and reviewing the decoded approval details, you ensure that what you think you are approving matches what you are actually signing.

Using hardware wallets during and after recovery

If you own a hardware wallet such as a Ledger device or Trezor hardware wallet, using it alongside Rabby during recovery offers a meaningful security improvement. Rabby supports Ledger, Trezor, Keystone, OneKey, GridPlus, and BitBox02 hardware wallets. When you connect your hardware device to Rabby, your private keys remain on the device; Rabby handles the transaction construction and submission, but signing happens on the hardware itself.

During the approval revocation phase, each revocation must be confirmed on your hardware device. This adds friction—you must physically confirm each transaction on the device—but it means that no malware on your computer can sign a revocation without your explicit, in-person approval. It is the same principle that made your hardware wallet valuable for storing funds in the first place: the private key never leaves the secure environment.

After recovery, if you do not already use a hardware wallet, this is a strong signal to acquire one for accounts holding significant assets. A hardware wallet is not immune to malicious dapps; you can still approve a scam address on a hardware wallet just as easily as on a software wallet. The difference is that a hardware wallet’s private key cannot be compromised through wallet software, browser extensions, or operating system vulnerabilities. If your computer is compromised but your hardware wallet is not connected, your funds remain safe.

For active management of approvals, you do not need your hardware wallet connected to your computer constantly. You can use Rabby with a software wallet for day-to-day transactions, then connect your hardware device when you need to revoke a sensitive approval or move funds to cold storage. This hybrid approach balances usability with security: your private key stays offline until you need it, but you can still audit and manage your wallet’s interaction surface regularly.

Avoiding the trap: How to recognize and refuse malicious dapps before they ask for approval

The final part of recovery is prevention. Malicious dapps usually follow a recognizable pattern. They may use a domain name that resembles a legitimate protocol but with a slight misspelling: “uniswap-protocol.com” instead of “uniswap.org,” or “openseatrade.io” instead of “opensea.io.” They may appear in search results because the attacker paid for ads, or they may be shared in social media or Discord with a referral link that claims to offer a bonus or airdrop.

Once you connect your wallet to a malicious dapp, it displays a fake interface that looks like a legitimate DEX or swap aggregator. When you approve a token to interact with what you believe is a DEX, the approval is actually granted to the attacker’s contract address. Rabby’s approval management and address checker help identify these approvals after the fact, but the real defense is not connecting in the first place.

Verify the domain name carefully. Use the official links from the protocol’s GitHub, blog, or verified social media accounts. If you are claiming an airdrop, check whether the protocol has officially announced it; scammers often impersonate protocols to steal approvals. If a dapp asks you to approve an unlimited amount or to approve a token you do not recognize, those are red flags. Legitimate protocols ask for reasonable amounts and for you to approve tokens you are actually using.

Rabby’s transaction simulation provides a last-minute warning, but it cannot override a decision to connect to a phishing site in the first place. The security of your wallet depends on your own discernment about which sites you visit and which approvals you grant. That said, after a user has completed their rabby wallet download and set up the wallet, the built-in approval management tools make it practical to audit your permissions regularly. Setting a monthly reminder to review your approvals—checking which addresses hold access to your tokens and revoking any that are obsolete—turns approval management from a crisis response into a routine security practice.

Testing your recovery: A transaction simulation workflow

Before you consider your recovery complete, perform a verification transaction. Send a small amount of a token to a new address under your control—a second wallet address, a hardware wallet, or a testnet address—and observe the complete transaction lifecycle in Rabby. As you prepare the transaction, Rabby will simulate it and show you the expected outcome. Review the decoded transaction details, check the receiving address, and verify the amount.

This dry run accomplishes several things. First, it confirms that your revocations were successful and that you can still move funds out of your wallet. Second, it gives you confidence in Rabby’s simulation and approval management features. Third, it creates an audit trail: you can see the transaction in block explorers and on your own records, confirming that your wallet is still under your control.

If during this verification transaction you encounter unexpected warnings or if the simulation reveals unexpected behavior, stop and investigate. The simulation feature is designed to catch anomalies before you sign; trust it. If you receive a warning about a token transfer to an unexpected address, or about a contract interaction you did not initiate, that is evidence that your wallet may still be compromised or that you have missed an active malicious approval.

Once the verification transaction completes on-chain, you can move forward with confidence. Your wallet is clean, your dangerous approvals are revoked, and you have a tested recovery protocol in place for the future. The recovery process is time-consuming but finite; each revocation transaction you confirm and each approval you audit moves you closer to full restoration of control and trust.