CentOS 7: Strange directories appearing in /

On my CentOS 7 (64 bit) machine some strange directories are appearing in the root directory / I can't work out what's causing it, if I delete them they slowly start to reappear. Here is a sample: drwxr-xr-x 2 root root 4096 Apr 19 09:15 Y-8f9479b39a92bac7-0000000000 drwxr-xr-x 2 root root 4096 Apr 15 08:20 Y-af72e17029b2d6c1-0000000000 drwxr-xr-x 2 root root 4096 Apr 20 09:30 YAg*-f8fe9fbc16e2d7e3-0000000000 drwxr-xr-x 2 root root 4096 Apr 20 20:15 y:-cd1a6f4e05353e19-0000000000 drwxr-xr-x 2 root root 4096 Apr 27 15:45 Y-df78a7ff0627a98c-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 14:50 Y-e340633e382d2dfa-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 11:10 Y-f63ddb0510f522bd-0000000000 drwxr-xr-x 2 root root 4096 Apr 23 12:25 Yg=B-d85f91f40842530a-0000000000 drwxr-xr-x 2 root root 4096 Apr 28 04:25 y:N-d16c3206c12f5644-0000000000 drwxr-xr-x 2 root root 4096 Apr 26 17:50 Y:p-05b9ee59a8e426da-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 19:20 yp-6131660bc56433f0-0000000000 drwxr-xr-x 2 root root 4096 Apr 26 21:20 Yz-57ca695582281830-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 12:20 Z-056bc56238327542-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 17:05 Z-06d6559ea7d8d81e-0000000000 drwxr-xr-x 2 root root 4096 Apr 15 09:15 z-078580c414cd831a-0000000000 drwxr-xr-x 2 root root 4096 Apr 14 15:05 z-1c234db314fd3d4f-0000000000 drwxr-xr-x 2 root root 4096 Apr 17 16:40 Z3-fb84f61e06366829-0000000000 drwxr-xr-x 2 root root 4096 Apr 16 10:00 _Z-475f2f63ed961d9b-0000000000 drwxr-xr-x 2 root root 4096 Apr 22 18:45 -Z-4d85b858dd07d49a-0000000000 drwxr-xr-x 2 root root 4096 Apr 18 17:40 z-7549c367428e3062-0000000000 Edit: Is there a way to trap and log which process is writing these files?