Dude?

“According to the email our cyber experts sent to our teams, they believe a hacker tool Metasploit was used,” it continued.

Metasploit, an open-source project used to find vulnerabilities in software, is reportedly very easy and cheap to develop.

Google Plus

“There was also some music playing randomly on several of the workstations during the middle of the night with the volume maxed out,” the e-mail reads. “I believe it was playing ‘Thunderstruck’ by AC/DC.”