Google Reader and Picasa users should beware of invitations to view fake YouTube videos.
Researchers at web security firm Fortinet say a malicious program, similar to the Koobface worm that infected Facebook users this summer, is using the Google Reader and Picasa photo websites to spread.
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When Facebook users try to view the videos they are told they need to download codec decompression software to enable them to do so.
Instead, they download a malicious program onto their PC. This gives the cybercriminals remote access to their data which can be used for fraud. Their machine could also be used to relay spam e-mails.