An attacker hosts a file called word.exe on their web server and gets the victim to download and run it. What could that file really be, and why the misleading name?

It could be any executable payload — here it's a Meterpreter reverse-shell built with msfvenom in the previous step — disguised as a harmless document; double-clicking it opens the attacker's remote shell.

The point isn't the specific payload: the name word.exe tells you nothing about what the file does, precisely because a name is arbitrary. It could be Meterpreter, ransomware, a keylogger, or a wiper. This is social engineering married to a payload. The executable is given an innocent name (and often a document icon) so the victim trusts it — here it's served from the attacker's own Apache web server at http://<attacker>/share/. In the real world the same payload arrives as an email attachment, a USB drop, or a drive-by download.

The takeaway: an executable can pretend to be anything. word.exe is still a program with full user privileges the instant it runs — Windows even hides the .exe by default, so "word" looks like a Word file. The defense is simple and behavioural: never run executables from untrusted sources, and show file extensions.

Tip: A file's name and icon are cosmetic — only the actual bytes (and signature) matter.