North Korean hackers targeted cryptocurrency e-commerce platform Bitrefill during an attack on March 1, according to a post-mortem from the company published Tuesday. 

In a lengthy statement, Bitrefill said hackers allegedly tied to North Korea’s Lazarus group accessed around 18,500 purchase records that contained email addresses, crypto payment addresses and metadata including IP addresses.

Bitrefill is designed to allow people to live off of cryptocurrency, enabling users to buy digital gift cards or pay bills online with it. The company has partnerships with Amazon, Doordash, Apple, Uber, Walmart and more.

The company first announced issues on March 1 and eventually was forced to take systems offline when it was discovered to…