Hi Wilver68,
It seems that currently we are not able to use flow to detect and kill attachment virus, all the files can be saved to OneDrive, including a virus contained zip file.
If the virus contained zip file always contain some special words, you could consider to add a condition and configure it looks like “Attachment Name contains” or “Attachment Name doesn’t contain” to avoid saving the virus files.
Please have a try with this, and feel free reply if you need more help.
Best regards,
Mabel Mao