Hi Everyone,
A recent release of Packer has been triggering Windows Defender, which is telling users that Packer contains a trojan. We've been in touch with Microsoft through the Windows Defender Security Intelligence program, and we can confirm this is a false positive. Updating your definitions version should prevent Windows Defender from identifying packer as malware. More information can be found on this github issue:
https://github.com/hashicorp/packer/issues/6093#issuecomment-378708069
We are working with Microsoft to identify ways we can prevent this from happening in the future.
If you have any questions, please feel free to reach out.
Thanks,
--Matt Hooker