> "The FBI gained physical access to some of the compromised computers, studied Snake and developed a tool called “Perseus” to decrypt and decode Snake communications."

I'm confused. Did FBI create Perseus, or did they buy it[1]?

[1]https://www.bbc.com/news/technology-57881364

It sounds like they patched infected hosts but didn't necessarily identify or remove any command and control infrastructure. Did I read that correctly?