: A piece of malware called a Trojan installed itself in a hidden folder. It didn't pop up any windows or show any errors, allowing it to stay undetected by basic security software.

To avoid falling victim to files like Pus.zip , follow these digital safety practices:

: It then used the office manager’s email account to send copies of itself (disguised as Pus.zip ) to everyone in her contact list, making the infection look like it came from a trusted source.

by calling them directly if you receive an unexpected attachment, rather than replying to the email.

Inside was a single file that looked like a PDF but was actually an executable program. The moment it was opened, several things happened simultaneously:

: The malware began scanning the computer for saved passwords, browser cookies, and banking details, quietly sending them to a remote server.