I have an Excel project with a lot of VBA macros.
I've just added a macro to save attachments from Outlook in a folder - and now Fsecure believes my Excel file is dangerous and puts it in quarantine.
The funny thing is, an Excel file with ONLY this macro in it is OK, and an Excel file with all my OTHER macros in it is OK. Among the other macros is one to execute DOS commands.
I copy-paste the macros via a text editor, so it's NOT - I believe - because some foreign code sneaks in without me noticing it.
Fsecure is using "heuristics", and I suppose it works a bit like a spam filer: Any file will score points based on several different criteria, and if it exceeds a treshold, it will be deemed dangerous.
I could post my macros here, but what I really want to know is, do anyone have guidelines, do's and don'ts, about this? Or similar experiences? In the end, my Excel project will be used by others, and I do not know what security software they will have.