I'm a little afraid to get bashed since this is super non-specific but this is exactly my problem. I'm finding weird file duplicates on my computer – with the same name as the original file but an added dot at the start plus a six-digit random extension at the end. It looks like this (below the originals, above the duplicates):
892707 24 -rwxr-xr-x@ 1 myusername staff 8704 Oct 4 22:49 .schlussel_02.xls.2DNKl1
934562 24 -rw-r--r--@ 1 myusername staff 8704 Oct 4 22:49 schlussel_02.xls
892704 8 -rwxr-xr-x@ 1 myusername staff 960 Jan 13 2017 .telecolumbus_alias.9b260v
934531 8 -rw-r--r-- 1 myusername staff 960 Jan 13 2017 telecolumbus_alias
At first I thought I had become the victim of a ransomware attack but these files are not encrypted but exact duplicates – if I remove the additional parts of the name they open just fine.
The files are located in a folder which syncs via Resilio between Windows 10 (NTFS) and macOS 10.13.2 (APFS). Because of this, I do not even know whether these files have been created on Windows or macOS.
Virus Tools (on the PC as well as the MacBook) did not find anything.
Do I need to be worried? How do I approach this? Is there any way to find out what created these files? Any leads on what might be happening here?
