Mozilla has published in its blog some news regarding the incidence with the Vietnamese language pack for Firefox 2.
In February, a Vietnamese language pack for Firefox was published. The problem was that before being uploaded to the corresponding server, it had been already infected, as the internal code of the *.xhtml files had been modified and included the following instruction:
The files which contain that malicious code are detected as W32/Xorer.T.
This instruction resolves to: http://js.k0102.com/01.asp , don’t worry because this URL is currently offline.
The question is: how can anybody be sure that their computer is malware free?
You can check it in http://www.infectedornot.com, and scan your computer with the ActiveScan 2.0 online scanner, a security solution that operates on the basis of 'collective intelligence', which allows many more threats to be detected.