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Warning! Worm.Win32.Sober.I!
The latest version of the Sober worm is spreading fast. As with it's predecessors, Sober.I spreads by email attachments. The email text suggests that it is an error message from the mailserver and the undelivery report is attached.
Current email clients like Outlook or Outlook Express are able to block harmful file extensions like EXE, COM or SCR, but Sober.I sometimes comes packed in a ZIP file to bypass outlook security. The ZIP file itself is not harmful, but the content inside (an executable file with variable file name) contains the worm and must not be opened!
A more detailed description of the worm can be found at the a² Malware Database:
http://www.emsisoft.com/en/malware/?Worm.Win32.Sober.I
Sober.I can be detected and removed with a² Free and a² Personal with the latest signature updates. The latest versiona² Personal background guard will block the worm if it is started. Please run the a² Online-Update immediately and ensure that the new automatic update feature in a² Personal is enabled.
Sincerely yours,