An indictment unsealed on Wednesday revealed that Thompson not just stole data from misconfigured servers hosted with a cloud-computing company, but also used the computing power of hacked servers to mine for cryptocurrency, a practice commonly known as "Cryptojacking."
Thompson, known online as "erratic," was arrested by the FBI on July 29 concerning a massive breach in Capital One Financial Corp that exposed the personal information of more than 100 million credit card applicants in the United States and 6 million in Canada.
The stolen data included approximately 140,000 Social Security numbers and 80,000 bank account numbers linked to United States customers, and 1 million Social Insurance numbers belonged to Canadian citizens, along with some customers' names, addresses, dates of birth, credit scores, credit limits, balances, payment history, and contact information.
Law enforcement became aware of Thompson's activity after she posted information relating to her theft of Capital One data on her GitHub account.
While the indictment [PDF] did not name the involved cloud-computing company, it's highly likely to be Amazon as Thompson previously worked for Amazon Web Services, which provides cloud computing services to Capital One among others.
But it should also be noted that Amazon Web Services was not compromised in any way since Thompson gained access to the cloud server due to Capital One's misconfiguration and not through a vulnerability in Amazon's infrastructure.
The indictment also did not provide names of the other 30 victims, but it did describe three of the targeted organizations as a state agency outside the State of Washington, a telecommunications conglomerate outside the U.S. and a public research university outside the State of Washington.
Investigators have found no evidence of Thompson selling or disseminating any of the stolen information.
The 33-year-old Seattle-based software engineer remains in custody and is scheduled to be arraigned on the indictment in U.S. District Court in Seattle on September 5. She could face up to 25 years in prison if convicted.