ztype.exe is a classic example of a dual-use filename. In its legitimate form, it’s a harmless, fun typing game. In malicious hands, it’s a perfect Trojan disguise. The difference comes down to .

is a popular, open-source browser-based (and sometimes downloadable) game where you shoot down alien ships by typing the words displayed on them. It’s a fun way to improve typing speed and accuracy.

In contrast, a malicious ztype.exe might:

Malware authors often name their executables after popular games to trick users into running them.