Windows binary files in Git repository

[nqv]

When i first clone this repo, git diff reports crlf changes to all *.{exe,dll,sys} files.
So I think those file should be treated as binary

diff --git a/.gitattributes b/.gitattributes
index 72a6d21..9159b23 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,4 +2,6 @@
 * text eol=lf

 *.bit binary
-
+*.dll binary
+*.sys binary
+*.exe binary

And there are two folders with only a capital I difference in their name: Installer and installer. Haven't tried in Windows yet but is it case insensitive?