The latest threat to hit the internet is a variant of the Sober worm that passes itself off as an email from the CIA or FBI. Several different assessments rate the threat from this worm as anywhere from medium to severe.
This variant of Sober generates e-mails that purport to be from the CIA or FBI. These messages tell the recipient they have been looking at illegal Web sites and should answer some questions in the e-mail’s attachment. If the attachment is opened, the computer is infected, and the virus sends copies of itself to any e-mail addresses found on the hard drive.