Thompson was arrested Monday in Seattle, where she resides. Since leaving college, she's worked as a software and systems engineer at various companies in the Seattle area.
Most recently, Thompson worked as a systems engineer for Amazon's cloud software business, Amazon Web Services, which Capital One uses. An Amazon spokesperson told Bloomberg that she last worked there in 2016.
A "firewall misconfiguration" left Capital One's cloud servers vulnerable, which Thompson was able to access. She worked on Amazon's cloud products when she was employed there, but an Amazon spokesperson told Bloomberg the hack didn't require insider knowledge.
Source: Gitlab, Bloomberg
According to the Department of Justice, Thompson posted about her data breach on GitHub, a website for developers to share code. A GitHub user, only identified as an "external security researcher," saw what Thompson had shared, and tipped off Capital One.
Further investigation by Capital One and the FBI found more instance where Thompson had boasted about her hack. The FBI found she has posted about it in Slack, Twitter, and Meetup.
On Twitter, where she goes by the alias "erratic," Thompson sent a direct message reading, ""Ive basically strapped myself with a bomb vest, f------ dropping capital ones box and admitting it."
Source: Business Insider