Fake eCard updates
Fake eCard spam mails continue to circulate even after the new-year excitement is settled down. As usual, these mails contain links to downloadable fake greeting cards that are generally named "card.exe" or "postcard.exe".
When executed, these malicious executables turn your PC into a zombie machine that becomes a part of Storm/Waledac botnet (more information can be found here and here).
Newer variants of fake eCard executables (hosted at
http://topgreetingsite.com- do NOT visit that site! ) are not detected by many AVs as of now (as seen in VirusTotal scan here). An automated analysis of this file is available at ThreatExpert here.