Macro-Blocking & How Threat Actors Are Adapting explains the shift from Office files to archives like RAR.
You download a .rar (like the one you mentioned) or .zip file. This is often done to hide the malicious code from email scanners that might block a direct Office attachment.
Because Microsoft has been cracking down on Office macros, threat actors have started hiding their malicious files inside container formats like or ISO to bypass security filters.
It looks like you're diving into some cybersecurity research! Finding a file named Office Macro Downloader.rar is a major red flag, as this is a classic technique used by hackers to deliver malware.
Once enabled, the macro (VBA code) runs in the background. It doesn't usually be the virus itself; it's a "downloader" that reaches out to a remote server to pull down the actual malware—like ransomware or a credential stealer. Why This is Trending Again
Macro-Blocking & How Threat Actors Are Adapting - Proofpoint
Historically, hackers sent .doc or .xls files directly. Now, they use a multi-step "infection chain":
Here’s a breakdown of why that specific file type is so interesting from a security perspective: The "Macro-Archive" Strategy