This option allows us to scan uploaded files looking for malware patterns, multiple file extensions (used to bypass filters) and forbidden file extensions.
Enable this feature.
Look for files with multiple extensions (for instance, malware.php.txt)
Not allowed mime-types. A complete list of mime-types can be found here: http://www.iana.org/assignments/media-types/media-types.xhtml or https://www.digipres.org/formats/mime-types/
Forbid uploaded files with this filetype (use comma separated values).
Delete uploaded files.
We can do nothing or add offensive IP to dynamic blacklist.