weekly cron jobs

once a weekend on the weekends my server gets very high CPU use. It is not tracffic so I think it maybe a cron job running. I do not want to disable a cron job that Direct Admin needs. Can you tell me which of these programs could be the cause

-rwxr-xr-x 1 root root 380 Mar 27 2007 0anacron
-rwxr-xr-x 1 root root 1938 Jan 26 2010 99-raid-check
-rwxr-xr-x 1 root root 83 Apr 17 2009 chkrootkit.sh
-rwxr-xr-x 1 root root 414 Jan 6 2007 makewhatis.cron
-rwxr-xr-x 1 root root 172 Apr 18 2009 rkhunter.sh

I'd rather say, that's 99-raid-check

Google for details. That has nothing related with Directadmin.

I ran that manually and it just took a few moments to run and no server load changes

It won't do anything (re-build software RAID1), until the conditions will be fulfilled. Google for more details.