The contents of a virtual hard drive from the United States Army Intelligence and Security Command were leaked onto the Internet and found on a publicly accessible Amazon server, a cybersecurity firm announced Tuesday.

The data exposure was first discovered by Chris Vickery, the director of cyber risk research for UpGuard, in September. Vickery gained access to the Amazon Web Services S3 cloud storage bucket that included roughly 100 gigabytes of information related to an Army intelligence project, codenamed “Red Disk.”