He bypassed the security layer and dove into the raw code of the
These are plain text files used by your operating system to map hostnames to IP addresses. Security software often monitors these to prevent malware from redirecting your traffic.
: Some tools add this to the hosts file to prevent the "nagware" behavior of Security Scan Plus.
Because hosts file modifications are a classic signature of adware and Trojans trying to disable defense systems, you should run a deep scan of your system.