Getting Trojan:Script/Wacatac.B!ml notification from Windows Defender

When I use the Mattermost Windows app or Mattermost in the browser I am gettting a notification in Windows Defender about Trojan:Script/Wacatac.B!ml is a threat in the Mattermost or Chrome cache.


Me and only one other user from the 12 active users are getting this notification.
We are both running Windows 11.

Mattermost is a self-hosted instance but not sure wich version it is.

Is this a false positive or is there something else happening?


It looks like it is caused by the custom emojis. After I have turned this feature off the threat notification doesn’t show up anymore.