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:
By the time the IT department noticed the unusual network traffic, the firm’s sensitive client data had already been compromised. How to Protect Yourself Pus.zip
: 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. Inside was a single file that looked like
, especially those sent via email from unknown or unexpected sources. Pus.zip