From zdnet.com
Cryptocurrency trading platform BlockFi disclosed this week a security incident during which a hacker attempted and failed to steal funds from the company’s users.
The attack took place last week, on May 14, BlockFi said in a post-mortem report [PDF] published on Tuesday.
The hacker used a SIM swapping technique to take control over an employee’s phone number, reset the employee’s email password, and gain access to the email account, along with accounts on the BlockFi platform.