Good security tips in an e-mail with a virus attached / 2019-05-06

Just seen in an e-mail with a virus, looking like it's something from a bank:

Security tips

1. Install virus detection software and personal firewall on your computer. This software needs to be updated regularly to ensure you have the latest protection.
2. To prevent viruses or other unwanted problems, do not open attachments from unknown or non-trustworthy sources.
3. If you discover any unusual activity, please contact the remitter of this payment as soon as possible. 

But the attachment has malware.