There are no near term plans to provide this functionality. However we will keep it under review for periodic re-evaluation in the future.
Azure App Service TeamRichard Beesley commented
Another option is to use the new Trend service but this is overkill for smaller solutions. It would be really helpful to have a service built around the MS anti-malware functionality that can be used from pure PaaS services such as Web Apps, Functions etc
Thank you for your suggestion. We are reviewing it and will get back to you.Richard Beesley commented
Other variables in ModSecurity would also benefit from being customisable e.g. tx.allowed_methods to reflect REST, WebDAV etc.