Japanese Crypto Exchange DMM Bitcoin Suffers $305M Hack

Measures have been taken to prevent further unauthorized outflows, the exchange said.

4,502.9 BTC ($305 million) was stolen from the exchange.

DMM Bitcoin said it will guarantee the full amount stolen.

All spot buys have been temporarily restricted and customers withdrawing yen may face delays.

DMM Bitcoin, a Japanese cryptocurrency exchange, said it lost 48 billion yen ($305 million) of bitcoin (BTC) following a hack.

In a blog post on its website, DMM Bitcoin said 4,502.9 BTC "leaked" out of the exchange. Measures have been taken to avoid further unauthorized outflows.

Data provided by security firm Blocksec shows that the hacker divided up the stolen bitcoin across 10 wallets in batches of 500 BTC.