| Excel 4 Is Alive and Well, and Ready to Attack|
Almost 30 years ago, VBA supposedly replaced Excel’s old macro system. But that system is still present, and extremely useful to malware coders.
You've got to be a real cybergeezer to remember using Excel 4, given that it was replaced by Excel 5 in 1993. After almost 30 years, surely everyone is running a more up-to-date version of Microsoft's popular spreadsheet software. So why do we care about Excel 4? It turns out that Excel 4's macro system is alive, armed, and dangerous.
The problem is those macros have full access to the operating system, while VBA (which supposedly replaced macros) can’t do anything outside the spreadsheet. And the system lends itself well to obfuscation, meaning malware coders can hide their macros' malicious actions...