What is this folder named "d1o1m0o7b1i1le"? Is it a virus?
The folder is created by (at least 1) apps developed by DoMobile Lab. As a hint, when you remove all numbers from the folder name, it spells /.domobile.

As a proof, after installing AppLock and running it, there will be /domobile and /.d1o1m0o7b1i1le folders on the SD Card root folder.

I don't think it is a virus, and it might be really important for DoMobile apps to work properly.