'Attack Page' Scam Lurks in Firefox and Chrome

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A new malware campaign takes advantage of the "malicious site" warnings commonly displayed by both Firefox and Chrome to trick unsuspecting users into downloading a rogue virus application.

The attack happens when Web surfers visit a page offering "SecurityTool," a known malware application that purports to be antivirus software. On both Firefox and Chrome, a fake warning page then pops up that mimics the messages those browsers normally give users who visit suspect sites. 
 
On Firefox, the warning alert is titled, "Reported Attack Page!" while on Chrome the page reads, "Warning: Visiting this site may harm your computer!" Both such warnings invite users to "Download Updates."

Users who click the download button then end up with a file called "ff_secure_upd.exe" on Firefox or "chrome_secure_upd.exe" on Google Chrome either way, what they really get is the rogue antivirus file and an invitation to pay a license fee for supposed protection.
Firefox users with scripts enabled, in fact, don't even have to click the "Download Updates" button--rather, they'll just be prompted to click "OK" to download "Firefox secure updates." Clicking "Cancel" only results in a repeated warning that updates need to be downloaded.
In addition, a hidden iFrame that's also part of the attack loads a Phoenix exploit kit from a different site, thereby exposing users to further exploitation.