The database also exposed all compromised data traded on the website, including 623,036 payment card records issued by the banks from the US, Canada, UK, China, Singapore, France, Brazil, Saudi Arabia, and Mexico, 498 sets of online banking account credentials, and 69,592 sets of US Social Security Numbers and Canadian Social Insurance Numbers leaked too. Swarmshop has been in operation since at least April 2019. By March 2021, it had over 12,000 users and over 600,000 payment card records for sale. Group-IB said the total amount deposited on all the accounts was at $18,145.73 by March 2021. Hackers who breached the site didn’t divulge how the hack happened. Instead, they posted a message with a link to the database. However, one clue showed that two card shop users attempted to inject a malicious script searching for website vulnerabilities in the contact information field.