Hi, thanks for the information. We didn't know these viruses.
Regarding Forest, all objects are created in the "forest_templates" layer. There are two types: forest_template_xxxx (billboards) and forest_library_xxxx (library items).
This layer is hidden and not renderable (to avoid that objects are visible while working), but that's all. Forest doesn't create other objects in the scene.
I hope that helps.