Regex that matches all characters including newline

[jbrenner]

What's the simplest regex that will match any character including newline? I want to be able to match all unknown content between two very specific capture groups.

Thanks! Jonathan

[ITWhisperer]

Start with (?s)

| makeresults
| eval _raw="ABC
DEF
GHI"
| rex "(?s)ABC(?<middle>.*)GHI"

[jbrenner]

Thanks, ITWhisperer. Perhaps I didn't ask my question clearly enough. I was looking for something like this:

[\S\s\n\t\r\n\f.]+

It may be redundant, but it seems to work.