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.
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.