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Threatwatch

Data Breach at Top Cryptocurrency Exchange Leads to Stolen Coins

Network intrusion; Currency Theft

Bithumb, one of the largest bitcoin exchanges in the world, recently discovered theft of the personal information of more than 31,800 users—and some drained digital wallets.

Based in South Korea, the exchange hosts one of the world’s top five largest bitcoin markets, and the largest of ether, another form of cryptocurrency.

The company said it discovered the breach June 29 and the thieves made off with the names, cellphone numbers and email addresses of 3 percent of its users, Brave New Coin reported.

Bithumb said the funds weren’t accessed, but many users reported having their digital wallets emptied after receiving a call from someone claiming to be a Bithumb representative. The imposter asked for additional account information like one-time passwords.  

The company pledged to cover losses up to 100,000 won (or about $87), though one user reportedly lost 10 million won. The Korea Internet and Security Agency, the Korea Communications Commission and the Supreme Prosecutors’ Office are investigating the incident, according to Brave New Coin.

sector

Financial Services; Web Services

reported

July 4, 2017

reported by

Brave New Coin

number affected

31,800

location of breach

South Korea

perpetrators

Criminals

location of perpetrators

Unknown

date breach occurred

Unknown

date breach detected

2017/06/29