Data Breach

Mt. Gox Data Breach

24K records exposed • February 2014

Mt. Gox was the biggest Bitcoin exchange until hackers stole 850,000 Bitcoin. The exchange went bankrupt, and customers lost billions of dollars. Some are still trying to get their money back.

What Happened

Mt. Gox, once the largest Bitcoin exchange, collapsed after 850,000 Bitcoin were stolen. The theft went undetected for years and led to the exchange's bankruptcy.

Attack method: Transaction malleability exploitation

What Data Was Exposed

Bitcoin - 850,000 BTC (worth ~$460 million then, ~$40 billion at peak)

Is your business exposed?

What to Do If You're Affected

  1. 1.

    If affected, file claim with bankruptcy trustee

  2. 2.

    Monitor for settlement distributions

Lessons for Businesses

  • Cryptocurrency exchanges need auditing
  • Not your keys, not your coins
  • Detection of theft can take years

Sources

Related Breaches

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