Defender Email about Intrat Weekly - Can't find info about it

Hi WPMU Dev Team,

I just received an email from Defender on my server to check the file

my_errors.log in /wp-admin/my_errors.log
for the issue: Unknown file in WordPress core

When I check the log it mentions intrat weekly

I did a search for intrat on the Cpanel file system but nothing came up and can't find any more info about it on Google. Can you tell me what's going on? I just did a scan as well and all came back as good (I think).

I'm giving you access to the system in a bit but will be unavailable for 4 days for personal reasons. Can you take a look what may have caused this?

All the best from Asia,
Chris