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. Office Macro Downloader.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
Historically, hackers sent .doc or .xls files directly. Now, they use a multi-step "infection chain": You download a
Are threat actors turning to archives and disk images? provides a technical look at how .rar and .iso files help bypass "Mark of the Web" security tags.
According to researchers at Proofpoint , the use of traditional macro attachments dropped by recently because Microsoft started blocking them by default. In response, attackers pivoted to using RAR and ISO attachments to trick users into manually extracting and running the malicious files. Interesting Reads on the Topic