Yes, Vault 7 is where the Keystone is found. Another anon's work:
I went into Vault 7 Projects, search for “fire”….
“Angelfire is an implant comprised of five components: Solartime, Wolfcreek, Keystone (previously MagicWand), BadMFS, and the Windows Transitory File system”
“Keystone is part of the Wolfcreek implant and responsible for starting malicious user applications. Loaded implants never touch the file system, so there is very little forensic evidence that the process was ever ran.” This makes post Q 381 much easier to understand
“We Won’t telegraph our moves to the ENEMY.
We will however light a FIRE to flush them out.”