Crypto Wallet Fake Airdrop Phishing Signature Scam: An On-Chain Cleansing Scheme That Wipes Wallet Assets with a Single Signature

Who Gets Targeted

Victims are predominantly cryptocurrency holders aged 25 to 45 across all genders, with mid-to-low-tier long-term holders, NFT players, DeFi beginners, and airdrop hunters being the most heavily concentrated. Their psychological vulnerabilities are structured in three layers: first is greed, where seeing a free claim pop-up for 100,000 stablecoins or popular project tokens triggers an immediate click out of fear of missing out (FOMO); second is trust inertia, where seeing a familiar wallet authorization button creates a false sense of security similar to past contract signings without reading the transaction details; third is cognitive blind spots, failing to distinguish between Permit offline signatures and normal approves, and not understanding that a single signature can permanently transfer subsequent transfer rights to an unknown address. Many victims do not realize their operational mistake until all assets are completely transferred out, missing the golden recovery window.

骗局怎么运作

• Attackers replicate popular project official websites or place sponsored links on social media platforms and search engines. The pages feature striking red dots and messaging like 'You are eligible to claim 100,000 stablecoin airdrops,' creating a time-sensitive, exclusive-benefit atmosphere that lures holders into clicking the connect wallet button, making victims believe it is an official benefit distribution rather than a phishing trap.
• After the user clicks connect, the page invokes the WalletConnect protocol or injects frontend scripts disguised as a normal claiming process, but actually triggers a Permit2 offline signature request. Once signed, the unknown address can execute unlimited transfers on behalf of the user within the lockout period. Operationally, it looks almost identical to a regular authorization, and victims see only a string of hexadecimal data in their wallet interface without being able to judge its meaning.
• The wallet client displays only a long string of hexadecimal data that most users cannot interpret. Attackers exploit this cognitive gap by urging confirmation using pretexts like 'security verification,' 'anti-bot mechanism,' or 'claiming eligibility check.' Many victims close the page after signing without even receiving any tokens, completely unaware they have handed over asset control to the attacker.
• Once the signature is completed, the attacker's script automatically monitors new on-chain approval events. As soon as it detects stablecoin or mainstream token balances in the victim's address, it directly calls transferFrom to batch-transfer the assets to a intermediary wallet. To evade on-chain risk control thresholds, they often split the funds into multiple small transactions across cross-chain bridges, leaving victims with only a string of unfamiliar transfers on the block explorer without being able to quickly locate the source.
• After entering the intermediary address, the funds immediately have their paths scrambled via mixers or cross-chain bridges, with some cashed out through OTC brokers, leaving no traceable links in the chain. When victims realize their assets have been wiped out, they can only see an unfamiliar transfer record on the block explorer, making recourse nearly impossible and recovery through civil litigation difficult due to the challenges of cross-border evidence collection.

红旗信号（看到这些快跑）

• 🚩 The source website domain differs from the official one by only one or two letters or uses a long-tail suffix. The page often creates urgency using terms like 'official airdrop' or 'limited-time claim,' lacks official social media announcements for the event, and has no traceable project background.
• 🚩 Connecting the wallet immediately triggers a signature request, but the signature preview box displays unreadable hexadecimal data instead of readable information like 'authorized amount' or 'contract address' found in conventional approvals. Attackers often pressure users to confirm under the guise of 'security verification.'
• 🚩 The page does not require a full seed phrase but asks users to share designated social media content or recruit friends to unlock the claim—a classic phishing pool expansion tactic designed to draw victims into a community before executing secondary authorization harvesting, rather than actually airdropping tokens.
• 🚩 After signing, the purported airdrop tokens never arrive, and checking the blockchain explorer reveals that the wallet balance was instead transferred out by an unfamiliar transaction. The authorization recipient is an anonymous address with no contract audit history and a large volume of reported malicious activity on-chain.
• 🚩 Official social media channels have no announcement of the event, yet official community chats frequently forward the link. Furthermore, multiple users report asset loss on social platforms or wallet communities within a short timeframe, with concentrated outbreak times typically occurring around popular token airdrop windows.

真实案例

• In 2025, according to ChainCatcher reports, a crypto user searching for a wallet brand on a search engine clicked a phishing ad placed in a sponsored slot. Connecting the wallet triggered a fake signature pop-up, and the Bitcoin and stablecoins accumulated over years in the wallet were entirely transferred out within minutes. The victim stated on social media that the loss reached the level of their lifetime savings, and subsequently called for stricter reviews of crypto-related sponsored links on search engines.
• Technical analysis published by Tencent Cloud Developer Community in 2025 disclosed a stablecoin phishing case in South Korea involving approximately 800 million KRW. The victim clicked a signature on a counterfeit stablecoin wealth management platform, and the attacker hijacked smart contract permissions to transfer all stablecoins in the wallet. On-chain paths showed the funds passing through multiple cross-chain bridges before entering a mixer.
• The XRP Foundation and HTX Info successively announced in 2025 that a fake XRP airdrop event was circulating online. The replica page induced users to connect their wallets and sign malicious authorizations, resulting in multiple users' assets being transferred out. The Foundation issued a statement clarifying it was a counterfeit project and urged the community to remain vigilant.
• In March 2026, a virtual asset staking phishing ring case reported by the Gangbuk Police Station in Seoul, South Korea, involved gang members randomly making calls to induce victims to connect wallets for so-called 'staking' to earn high interest. After paying about 600,000 KRW in interest the first month to build trust, they stole the entire ~800 million KRW in USDT deposited by the victim and laundered it. Seven gang members were caught, and six were detained. (Source: [https://www.naeil.com/news/read/579822](https://www.naeil.com/news/read/579822))
• In August 2026, in a fake XRP airdrop warning reported by Bitcoin.com, the XRP Ledger Foundation and RippleX warned of fake airdrops, reward scanners, and phishing activities appearing on social media. Scammers used fake official accounts and direct messages to induce users to connect wallets or leak keys, and the Foundation stated it has never distributed any XRP airdrop rewards. (Source: [https://news.bitcoin.com/featured/fake-xrp-airdrops-spread-online-as-foundation-urges-users-to-stay-alert/](https://news.bitcoin.com/featured/fake-xrp-airdrops-spread-online-as-foundation-urges-users-to-stay-alert/))

Official Stance

• In December 2024, the SlowMist blockchain security team issued an early warning disclosing that the WalletConnect phishing Gives-series campaigns were widely imitated. Source domain spoofing and Permit authorizations were combined to execute wallet-emptying attacks, and users were advised to reject unfamiliar authorization requests.
• In March 2025, security firm CertiK released an on-chain monitoring alert pointing out that Permit2 offline signatures have become the core tool for next-generation wallet phishing. Dozens of on-chain cleanout incidents have been reported, and users are advised to reject unfamiliar authorizations and regularly use Revoke tools to clean up permissions.
• In April 2025, the National Internet Finance Security Technology Risk Analysis Special Committee reminded responsible platforms that fake airdrops and fake authorization signatures serve as channels for crypto scams. They emphasized that personal wallets should not be connected to pages of unknown origin, and any unknown contract requiring a signature should be treated as high risk.

How to Protect Yourself

• ✅ For any airdrop, only trust the main domains published in official social media and official documentation. Cross-check domain spellings character by character before clicking, and do not let pop-up red dots or urgent wording like 'limited' or 'exclusive' drive you to connect your wallet immediately. Any airdrop links distributed via search engines or social communities must first be cross-verified through official channels.
• ✅ Before signing, download built-in or third-party signature preview plugins in your wallet, or use wallets that support readable signature content display to parse transaction details. If permitTransferFrom or an unknown contract address appears, immediately cancel the transaction and disconnect.
• ✅ Set up dedicated isolated wallets for interactions. Main asset wallets should only hold mainstream coins and perform no authorizations, while new project interactions should use hot wallets with only a small amount of test funds. After authorization, develop the habit of using tools like Revoke.cash to review and revoke unused permissions, avoiding long-term permission exposure that can be exploited later.
• ✅ Upon discovering an unfamiliar signature request or abnormal asset transfer, immediately disconnect from the network and use a hardware wallet to re-import the seed phrase on a clean device, transferring remaining assets to a secure address. At the same time, tag the stolen address on blockchain explorers to form an evidence chain and contact local organizations and police to file a report.