Hackers have been able to exploit a critical flaw in Mozilla's Firefox browser. The Infostealer.Snifula programme installs Trojans that are then loaded at browser startup. The virus uses XPCOMS to install the Trojans.
XPCOMS are cross-platform component object models, which developers use to create extensions for Firefox. Symantec said that the attacks against Mozilla's open source browser began in March this year, according to spokesman Candid Wuest.
Wuest said: "When an infected user submits a Web form on a Web site, [JS.Ffsniff] will parse the site and steal all information that is submitted by the Web form, including passwords." Security experts say Firefox's popularity will mean more viruses.