According to email transcripts posted to Pastebin yesterday, and confirmed by the company, a group of hackers attempted to extort $50,000 from Symantec in exchange for not releasing its stolen PCAnywhere and Norton Antivirus source code.
The emails between Symantec employee Sam Thomas and the hacker(s) Yamatough, began in January. Symantec confirmed in a statement that it had contacted law enforcement after confirming the theft of the code and that the email exchange was, in fact, part of a criminal investigation.

Since no code yet being released and our email communication wasn’t also released we give you 10 minutes to decide which way you go after that two of your codes fly to the moon PCAnywhere and Norton Antivirus totaling 2350MB in size (rar) 10 minutes if no reply from you we consider it a START this time we’ve made mirrors so it will be hard for you to get rid of it.

More information [gizmodo]