Maintain skepticism towards social media marketing, ensure proper isolation of device environments, keep mnemonic phrases completely offline, and let large assets reside in secure chips.

Written by: Alan, Biteye content team

01 / FomoPeek Stolen, the Dark Forest's Fangs Re-emerge

In the past two days, the market began to show signs of recovery, but explosive news broke on Twitter: multiple on-chain players found their wallet assets instantly emptied without any unusual interactions. A joint review by SlowMist and the OKX security team pointed to the culprit being the Meme monitoring tool—FomoPeek (versions 1.1–1.2).

Reverse analysis revealed chilling details:

• Not traditional phishing: Users had not pasted mnemonic phrases on any fake websites or clicked on malicious contracts;
• Kernel-level exploitation: The app bundled a set of iOS kernel exploitation code that could automatically escalate privileges for different models and system versions;
• Sandbox escape and silent data theft: Broke through iOS app sandbox restrictions to directly decrypt the system keychain, even scanning other wallet data and system notes on the same device, silently relaying plaintext private keys back to the hacker's server.

Previous iOS download interface of FomoPeek

This malicious incident has shattered the safety illusion of "iOS App" in the crypto world, exposing a harsh reality: the savage battles in the dark forest of cryptocurrency have escalated once again. You must update your methodology for protecting private keys.

02 / New Type of Hacker "Social Engineering Hunt" Full Chain Analysis

In the past, hackers often used "fake airdrops, fake customer service, and high-profile Twitter replicas," which are difficult to fool veteran players today. Therefore, hacker teams shifted their focus to a more sophisticated social engineering setup chain:

🔗Investing in KOL marketing campaigns ─> Launching cashback and real functions ─> Users install on their phones ─> Utilizing phone system vulnerabilities to empty private keys

Phase 1⃣: "Buying Out" KOL's Credibility Assets

Many bloggers and KOLs do not have reverse engineering or code auditing capabilities, facing advertising budgets of thousands or even tens of thousands of dollars, making it easy to lose vigilance. Retail investors see familiar researchers and traders tweeting endorsements, instantly breaking down their psychological defenses: "If the big shots are using it, it must be safe."

Phase 2⃣: Using "Practical Features + Small Commissions" as Bait

Traditionally, phishing websites were malicious shell sites from the moment they were opened, but this time the malicious app's frontend features not only exist in reality but also come with an "invitation cashback mechanism." Retail investors, tempted by "the ability to track prices and earn daily commissions," completely lose awareness of the software's underlying permissions.

Phase 3⃣: Releasing the "Technical Poison Pill" at the Peak of Trust

The hacker did not strike on the first day but waited for the installation base to expand and for large asset holders to settle. The malicious code doesn't even need to be resident in the foreground, silently escaping the sandbox using system vulnerabilities to read the keychain, rummaging through local notes, and packaging the user's wallet private keys for extraction.

03 / Core Tutorial: Ultimate Protection Guide for Web3 Private Keys

Since hackers' social engineering schemes and system zero-day exploits are hard to guard against, how can ordinary players protect themselves?

⭐ The answer is simple yet difficult: protect your private keys.

Establish a "multi-layer defense and physical isolation" system to ensure that even if misled by certain KOLs or downloading malicious apps, hackers cannot physically access our private keys.

1⃣ First Line of Defense: Focus on Device and System Hygiene

The FomoPeek attack was successful primarily due to the iOS system's vulnerabilities being exploited. Apple's ecosystem myth also revealed its flaws in this incident.

👇 Apple iOS’s breaches and failures

• Malfunctioning review mechanism: Many believe "anything on the App Store is safe," but hackers easily bypassed Apple’s manual and automated review processes through dynamically issued commands and obfuscated secondary business modules, allowing malicious apps containing kernel attack frameworks to circulate freely in the official store.
• Delayed response and patching for vulnerabilities: The "sandbox isolation" long touted by iOS is not unbreakable. Many of the kernel vulnerabilities used by hackers have been circulating in the dark web or security circles, and Apple's approach to pushing security patches for older system versions is not aggressive, directly leading to many iPhones remaining on outdated iOS versions, eventually becoming "ATMs" for hackers.

👇 Principles of Self-Cleansing the Device Environment

• Keep the system up to date; don't find updates annoying: In Web3, each small version update essentially patches the zero-day/N-day kernel attack chains hackers are exploiting. Staying on an old system is like walking naked in the dark forest at night.
• Do not download ridiculous apps: Any non-essential, non-mainstream, non-open-source niche trading tools or auxiliary small software should not be installed on phones holding assets; especially prohibited are unknown "configuration profiles (Mobileconfig)" or web enterprise-signed applications.
• No jailbreaking: Jailbreaking means actively disabling the last line of security in the operating system.

2⃣ Second Line of Defense: Mnemonic Phrases "Absolutely No Digital Traces"

Many malicious software shares a major trait of scanning local unencrypted notes. Many victims believe "I haven’t shared my mnemonic phrases with anyone," but in reality, to save time, they casually store the 12 words in their iPhone's local password, notes, photo album, or chat software.

👇Prohibited "Naked Running" Behaviors

• ❌ Screenshots / Photos stored in the album: Modern phone albums come with OCR text recognition and automatic cloud syncing, making it easy for compromised apps to extract permissions;
• ❌ Stored in notes, Notion, cloud storage, email drafts: As long as the device's sandbox is breached, such files are entirely unencrypted;
• ❌ Sent to WeChat "File Transfer Assistant" or TG "Saved Messages";
• ❌ Copying and pasting mnemonic phrases between computers and phones: Input methods and background clipboard monitoring scripts can grab clipboard content within milliseconds.

👇 Correct and Standard Physical Backup Methods

• ✅ Offline manual copying: Handwrite on paper cards in a private space without cameras, double-checking twice;
• ✅ Metal mnemonic boards (Crypto Steel): For core assets, paper is prone to moisture and corrosion. Use stainless steel or titanium alloy plates to stamp and seal, fireproof, waterproof, and corrosion-resistant, stored in two different locations.

3⃣ Third Line of Defense: Asset Layering and "Dedicated Devices"

Putting all assets in the same phone wallet to engage with new tools and play around with new projects is like walking in a chaotic market covered in gold. Therefore, it is necessary to establish physical levels of fund isolation.

👇 Implementing a "3:5:2" Asset Tiered Structure

[Cold Storage / Vault] 70%~80% Large Funds ─> Hardware cold wallets / multi-signature Safe, private keys never touch the network, never participate in daily authorizations │

[Interactive Intermediate / Warm Storage] 15%~20% Medium to Short-Term Funds ─> Pure independent PC plugin used solely for interaction with major, audited mainstream protocols │

[Dedicated Authorization / Hot Wallet] 5%~10% Interaction Wear Funds ─> Independent backup device / hot wallet, used specifically for experimenting with new tools and minor projects │

📱 Setting Up a "Dedicated Testing Device" for Physical Environment Isolation

• Main asset device (vault device): Only install the phone's native system, officially verified apps, and hardware wallet companion apps. Absolutely do not install any niche trading software, auxiliary plugins, or rush scripts, and do not join random groups.
• Testing device (backup device): Prepare an idle backup device specifically used for browsing Twitter, experiencing KOL-recommended new tools, utilizing cashback bots, etc. This machine, even if the sandbox is breached or completely hacked, will only have a few US dollars of wear-and-tear funds, with the main assets untouched.

4⃣ Fourth Line of Defense: Permission Reduction and Signature Defense

Even if private keys are not stolen, phishing hackers may still rob funds by tricking victims into signing transactions.

👇 First Distinguish Signature Types:

• Transfer means transferring the coins directly;
• Approve means authorizing token limits to designated smart contracts (never authorize unknown protocols with unlimited limits);
• Permit / Permit2 are offline authorized signatures that do not require Gas, with scam websites often disguising them as "connect wallet" or "claim airdrop," always ensure to check Spender (the authorized party) and the deduction amount before signing.

👉 Use transaction simulation plugins: Install Rabby Wallet or browser plugins like Scam Sniffer, Pocket Universe; check assets' changes clearly before clicking;

👉 Regularly clean authorizations (Revoke): Visit Revoke.cash weekly or monthly to clear authorizations for protocols that are not used for long periods.

5⃣ Fifth Line of Defense: "Self-Review" in Daily Interactions

In the dark forest, the best defense is controlling your hands. Before every new project recommended by KOLs, enticing high commissions, downloading new applications, or clicking signatures, you must complete a self-review through the following three steps:

👇 Identifying Social Engineering Traps

• Check promotion frequency: Is this tool suddenly being recommended by many KOLs within 1-2 days?
• Consider the business logic: Is it using extremely high commissions and inducing new users to obscure the real profit model?
• Break the endorsement illusion: Always remember "KOL marketing represents ads only," DYOR.

👇 Isolate Operational Environments

• Main device has a veto: Absolutely do not install any experimental applications or scripts on the main phone holding significant assets.
• Consistently use a testing backup device: When experiencing new tools or engaging in small commissions, have you truly been using an independent idle backup device for the operation?
• Beware of sensitive permissions: Does the software attempt to induce you into installing unknown "configuration profiles (Mobileconfig)," corporate signing certificates, or to bypass app store installations? If you encounter such requests, terminate immediately.

👇 Strictly Guard the Private Key Boundary

• Clear local traces: Has the device’s notes, albums, screenshot recycle bin, and clipboard been thoroughly cleaned, such that no mnemonic phrases remain?
• Core large warehouse physical disconnection: Are all major core assets securely stored in hardware cold wallets, and mnemonic phrases never inputted back into phones or computers?
• Minimize hot wallet balances: Does the current wallet involved in interactions only retain negligible wear-and-tear funds (refill as used, and feel no loss if stolen)?

04 / Summary

Decentralization has given us complete ownership of our assets, but the cost is: the risk control of banks and the security of physical locations ultimately rests solely on you. We must be responsible for our wallets and our on-chain assets.

As hackers' methods have evolved from "low-level phishing" to "KOL social engineering brainwashing + underlying kernel exploitation," blindly trusting device brands or high-profile endorsements is no longer effective. To combat this elevated form of hunting, the most effective weapon is not complex hacking technology but the simplest principles and discipline:

Maintain skepticism towards social media marketing, ensure proper isolation of device environments, keep mnemonic phrases completely offline, and let large assets reside in secure chips.

Do not chase after small profits, and strictly guard the private key boundary, so you can navigate through the bulls and bears in the dark forest of Web3.