The cryptocurrency world woke up to alarming news on June 3, 2023: Atomic Wallet, a popular non-custodial wallet used by millions, had been compromised in a devastating attack that drained approximately $100 million from over 4,100 user wallets. With Bitcoin trading at around $27,075 and Ethereum at $1,892, the losses represent real financial devastation for everyday users who trusted the platform to keep their assets safe. If you are new to cryptocurrency or have been relying on a single wallet application, this incident is a wake-up call. This guide walks you through everything you need to know about securing your digital assets, step by step.
The Basics
A cryptocurrency wallet is software or hardware that stores the private keys needed to access and manage your digital assets on the blockchain. There are two main categories: hot wallets, which are connected to the internet and include mobile and desktop applications like Atomic Wallet, MetaMask, and Trust Wallet; and cold wallets, which keep your private keys offline, typically hardware devices like Ledger or Trezor. The fundamental trade-off is convenience versus security—hot wallets make it easy to transact but are vulnerable to online attacks, while cold wallets provide superior security at the cost of a less streamlined user experience.
The Atomic Wallet attack was particularly frightening because it was a supply chain compromise—meaning the wallet software itself was tampered with, not through any mistake by individual users. This type of attack bypasses all the usual advice about strong passwords and avoiding phishing links, because the application you downloaded and trusted was already compromised. Understanding this distinction is crucial because it changes what defenses actually work.
Why It Matters
Unlike traditional banking, cryptocurrency transactions are irreversible. Once funds leave your wallet, there is no customer service number to call, no fraud department to reverse the transaction, and no insurance fund to compensate you for your loss. The FBI has attributed the Atomic Wallet hack to North Korea’s Lazarus Group, a state-sponsored hacking unit with billions of dollars in stolen crypto over the past five years. These are not opportunistic criminals—they are sophisticated, well-funded operatives who specifically target cryptocurrency users and platforms.
In 2023 alone, North Korean hackers have stolen over $200 million from crypto users. Their attacks are ten times more lucrative than those of other criminal groups. The $100 million taken from Atomic Wallet users on June 3 represents the single largest incident of the year and underscores that every crypto holder, regardless of portfolio size, needs to take security seriously.
Getting Started Guide
Step 1: Assess your exposure. If you have ever used Atomic Wallet, assume your seed phrase and private keys are compromised. Even if you have not used it recently, any wallet generated within the application may be at risk. Check your wallet addresses on a blockchain explorer like Etherscan or Blockchain.com to see if any unauthorized transactions have occurred.
Step 2: Move your funds immediately. If you still have assets in Atomic Wallet, transfer them to a fresh wallet generated on a different platform. Do not import your Atomic Wallet seed phrase into a new application—if the seed phrase itself is compromised, importing it into a new wallet gives the attacker access to your funds there too. Generate a completely new seed phrase on a trusted platform.
Step 3: Get a hardware wallet. If you are holding more than a few hundred dollars worth of cryptocurrency, a hardware wallet is non-negotiable. Devices like the Ledger Nano S Plus, Ledger Nano X, or Trezor Model T store your private keys in a dedicated secure chip that is physically isolated from your computer or phone. Even if your computer is infected with malware, the hardware wallet’s screen and buttons allow you to verify and approve transactions securely. Purchase directly from the manufacturer’s website—never from third-party sellers where devices could be tampered with.
Step 4: Set up your hardware wallet properly. When you initialize the device, it generates a new seed phrase that you must write down on the provided card or, ideally, on a metal backup plate. Never photograph your seed phrase, never store it digitally, and never enter it on any website. The seed phrase is the master key to all your funds—anyone who obtains it has full, irreversible access to your cryptocurrency.
Step 5: Distribute your backups. Create at least three physical copies of your seed phrase stored in different geographic locations. Consider using a bank safety deposit box, a home safe, and a trusted family member’s secure location. Metal backup plates that resist fire, water, and corrosion are available for under $50 and provide far superior durability compared to paper.
Common Pitfalls
The biggest mistake newcomers make is storing significant holdings in a hot wallet for convenience. Hot wallets are designed for spending money, not savings. Think of them like the cash you carry in your physical wallet versus the money in your bank account. Keep only what you need for immediate transactions in a hot wallet and store the rest on your hardware wallet.
Another common error is reusing seed phrases across multiple wallet applications. If one application is compromised—as Atomic Wallet was—all wallets derived from that seed phrase are exposed. Each major holding should have its own unique seed phrase. Similarly, avoid the temptation to store your seed phrase in a password manager, cloud storage, or photo on your phone. Digital storage of seed phrases creates attack vectors that sophisticated hackers can and do exploit.
Finally, be wary of anyone reaching out to help you recover funds or secure your wallet after a breach. Scammers routinely target victims of publicized hacks, posing as support staff or security researchers offering to help recover stolen funds. Legitimate wallet providers will never ask for your seed phrase via email, chat, or social media.
Next Steps
After securing your assets with a hardware wallet and verified backups, take the time to review all your existing token approvals and connected applications. Use a service like Revoke.cash to see which smart contracts have permission to access your tokens and revoke any you no longer need. Enable additional security features on all exchange accounts, including two-factor authentication using an authenticator app rather than SMS, which is vulnerable to SIM-swapping attacks. Consider setting up a dedicated email address solely for cryptocurrency-related accounts to limit exposure from phishing campaigns. The crypto ecosystem rewards proactive security—take the time now to protect what you have built.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Always conduct your own research before making decisions about cryptocurrency security.
wish i read something like this before losing 2 ETH on a phishing site. the hot vs cold breakdown is exactly what newcomers need
2 ETH lost to a phishing site hits different when ETH was near $1900. that is almost 4K gone because the url looked close enough to the real one
almost 4K gone to a phishing URL that looked legit. this is why bookmarks exist, people
the seed phrase storage section is underrated advice. a piece of paper in a drawer beats a screenshot in your camera roll every time
youd be surprised how many people store seeds in apple notes. like literally typing the 12 words into a cloud synced app
apple notes is bad but i have seen people text their seed to themselves on whatsapp. unencrypted cloud storage for your private keys, genius move
apple notes is wild but at least its their own device. google drive spreadsheets with seed phrases is another level of reckless
metal seed backup and a hardware wallet. anything less is gambling