Real Losses. Real Lessons.
Every case study here is based on a real incident. Names and identifying details are removed, but the attack vectors, on-chain trails, and losses are real. Learn from other people's mistakes.
The $47K Ethereum Drain: A Clipboard Malware Attack
A user copied a wallet address and pasted something different. Clipboard malware had been silently replacing crypto addresses for weeks. By the time they noticed, 14.2 ETH was gone -routed through 8 wallets to a mixer.
SIM Swapped in 30 Minutes: How $120K in SOL Disappeared
The attacker called the carrier, transferred the phone number, reset the exchange password, and withdrew everything in under 30 minutes. The victim didn't know until their phone lost signal.
Discord DM Phishing: A Fake Mint Link Cost 8.5 BTC
A 'moderator' DMed about an exclusive NFT mint. The link looked like the real project site. The wallet connection prompt asked for a seed phrase -and the user provided it. Within minutes, 8.5 BTC was in transit.
The Unlimited Token Approval That Drained a DeFi Portfolio
Six months after using a DEX aggregator, a vulnerability in the contract was exploited. Because the user had granted unlimited token approval, the attacker drained every approved token -$28K across 4 assets.
Social Engineering a Crypto Startup: Inside Job for $2M
An employee with treasury access was manipulated over 3 months. The attacker built trust through a fake job offer at a competitor. The 'interview process' included sharing screen during a wallet transaction -revealing the multi-sig setup.
Don't become the next case study
Every incident above was preventable. A hardware wallet, proper key management, or basic threat awareness would have stopped each attack. The cost of prevention is always less than the cost of loss.