Hidden hacking: what is a “zero click” attack in the crypto world

Imagine this: you didn’t click anything, yet your crypto wallet got hacked. Sounds like science fiction? It’s the reality of a zero-click attack.

We explain how this method works, whether your crypto wallet can be hacked, and what to do to avoid it.

What Is a Zero-Click Attack

A zero-click attack is a type of hacking attack that requires the victim to take no action—no clicking links, opening files, or anything else. It all happens without their involvement. All that’s needed is a vulnerable app or device.

Hackers exploit vulnerabilities in software (for example, the smartphone’s operating system or the wallet app itself) to gain control of the device or extract private keys.

Typical objectives of a zero-click attack include:

• Gaining access to the crypto wallet without the user’s awareness

• Stealing private keys or seed phrases

• Transferring cryptocurrency to the attacker’s accounts

Attack Mechanisms

A zero-click attack is different from typical hacks because it requires no user interaction. The attacker uses exploits—special programs or code that "exploit" software weaknesses.

Here’s how it works: the hacker finds a vulnerability in a messaging system, media decoder, Bluetooth, or WebKit (browser engine), sends a specially crafted message or request that doesn’t need to be opened, and gains control of part of the system. Then they bypass PIN codes, biometrics, or app protections and access the wallet.

Often, such an exploit uses a combination of several vulnerabilities and targets specific operating system versions. That’s why keeping software up to date is crucial.

Real-Life Examples of Crypto Wallet Attacks

Although most high-profile zero-click attacks involve spyware tools like Pegasus, there have already been similar incidents in the crypto world.

In 2022, security researchers discovered that some Android mobile crypto wallets with WebView access could be hacked without user interaction. Attackers used HTML files with embedded scripts that automatically ran in the wallet’s internal web view. This allowed them to intercept seed phrases or send hidden withdrawal requests.

Another example is a vulnerability in the Bluetooth module of a popular hardware wallet. It allowed an attacker within range to connect to the device, intercept part of the communication, and attempt to alter or steal data.

How to Detect and Prevent a Zero-Click Attack

The biggest issue with zero-click attacks is their invisibility. Users see nothing suspicious until it’s too late. It’s hard even for security professionals to detect, as such attacks often leave no traces in logs or usual activity monitors.

However, there are indirect signs that may raise suspicion: the device drains battery faster, overheats, connects to the internet on its own, or performs actions without your input. In the case of crypto wallets, disappearance of funds or unknown transactions signal that your wallet has been compromised.

To minimize risks, use hardware wallets with minimal external connections, disable unnecessary smartphone modules (especially Bluetooth and NFC), and regularly update all apps and OS to the latest versions.

It's essential to choose wallets that have undergone independent security audits.

What Happens if You’re a Victim of a Zero-Click Attack

If your crypto wallet is hacked via a zero-click attack, consequences can be dire. The most common scenario is that all funds in the wallet are instantly lost. The hacker gains access to the private key or seed phrase and transfers the cryptocurrency to their own addresses. Due to blockchain anonymity, recovering funds is virtually impossible.

Beyond direct financial losses, users risk:

• Losing control over other associated wallets (for example, those shared via a single seed phrase);

• Compromising access to DeFi platforms, exchanges, and NFT collections;

• Ending up with an “eternally empty” wallet since the address is considered unsafe for reuse.

Fund Loss Cases

In 2023, there was a sharp increase in crypto phishing attacks. The FBI reported that losses from cryptocurrency fraud exceeded $5.6 billion — a 45% rise compared to 2022. The largest losses came from investment scams—almost $3.9 billion.

During such attacks, scammers heavily combine social engineering with technical exploits, including zero-click attacks—stealing private keys or seed phrases without obvious user interaction.

How to Minimize Risks

To reduce your chances of a wallet breach:

• Keep large sums only on hardware wallets that aren’t always online;

• Don’t install suspicious software, especially from untrusted sources;

• Enable two-factor authentication wherever possible;

• Regularly update the OS and all apps;

• Use separate devices for crypto storage—without social media, browsers, or third-party services access.

Precautionary Measures

To prevent zero-click attacks:

• Update your mobile OS and apps immediately when new versions are released;

• Don’t store seed phrases in notes, cloud storage, or screenshots;

• Turn off Bluetooth, NFC, and location services when not in use;

• Avoid public Wi‑Fi, especially when accessing your wallet;

• Don’t open messages or files from unknown contacts—even on Telegram or WhatsApp.

What to Do If You Suspect a Breach

If you notice unusual transactions or unstable wallet behavior:

• Immediately transfer funds to a new address with a different seed phrase;

• Install a new wallet on another device;

• Report to the community or wallet support—it might be a widespread vulnerability;

• Do not reuse a compromised device.

Conclusion

A zero-click attack is one of the most dangerous types of hacks—users suspect nothing and press nothing.

To avoid falling victim, use reputable wallets, keep software updated, store seed phrases offline, and minimize risk using hardware solutions.