DMM Bitcoin Unauthorised Outflow, May 2024: What Happened & What to Check
Japanese exchange DMM Bitcoin lost 4,502.9 BTC in an unauthorised outflow. The company later announced it would wind down and transfer accounts.
Bitcoin
Mixin Network Database Compromise, September 2023: What Happened & What to Check
Mixin reported roughly $200m lost after the database of its cloud service provider was attacked, and suspended deposits and withdrawals.
Atomic Wallet User Fund Theft, June 2023: What Happened & What to Check
Funds were drained from Atomic Wallet users across multiple chains. The root cause has never been conclusively published.
KuCoin Hot Wallet Compromise, September 2020: What Happened & What to Check
Roughly $281m left KuCoin hot wallets. A large share was recovered through token contract upgrades and freezes by issuers.
Mt. Gox Collapse, February 2014: What Happened & What to Check
The largest bitcoin exchange of its era halted withdrawals and filed for bankruptcy protection, reporting roughly 850,000 BTC missing.