Hi All
A month back 4 of our 14 sub folders under shared root folder mysteriously went missing.
On investigation we found them to be hidden with the hide attribute check box being greyed out.
We went through many forums and could not find a solution.
We even went to the extent of formatting the file server and recreating them thinking it was an undetected virus that keeps out of our Eset file server solution but it came back.
Our folder structure is as follows;
Root folder "ABCD" is shared with Everyone "full control file share permission" and NTFS
permission to Admin "full control" and Everyone "list folder contents" as DFS.
We have within, sub folders per Dept. name that continues with the said root permission but with NO inherited.
To each Dept. folder we assign AD Security Groups for the said Dept. and provide them with NTFS "Modify" permission.
The Issue:
We were able to root cause and trace the cause to a new user JohnD. The moment we add him to any folder existing or new with NTFS"Modify" permission the folder gets hidden (does not happen with "Read & Execute" permission).
It gets worse, any domain Global security group to which he was in is also affected and stays that way even after we removed him.
Eg: when we add the said group with NTFS"Modify"
permission the
folder gets hidden (does
not happen with "Read & Execute" permission).
We deleted and recreated 3 of the 4 groups he was in and assigned them to new folders and set
NTFS "Modify"
permission, this time the
folder does not get hidden.
However a new issue of nested users not being able to access files saying they don't have access. When we add the user direct to the folder it is ok.
We can delete and recreate the User but both default Domain Users and Everyone security groups are affected.
Could this have been a virus that targets such AD Users and Groups?
How do we even troubleshoot this and at what attribute level?
Rgds Yohan