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Google Redirection + Firefox pop-up tabs, yet no visible infection...


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#1 tpr

tpr

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Posted 16 November 2009 - 02:38 PM

Hi

For the past three days, my computer (running an old XP OS without trouble for the past few years) has started behaving strangely, ever since I partially stopped an infected website from installing something on my pc.

Weird thing is: the symptoms are quite minor. Every once in a while (usually once or twice per day, at most), a google search link will be redirected (last time was to a primosearch link), or an ad tab (usually casinos or legit merchant sites) will appear in my Firefox. And that's it. No slowing down the computer, no independant pop-up window, etc...

Worse : I don't think of myself as an anti-spyware expert, or anything, but i've been around computers for a while now, and i've always been able to counter any virus or spyware invasion in the past. Zonealarm, Spybot, MBAM, Adaware, Hijackthis, and monthly antivirus scans have always protected my computer.

Except this time none of those can find anything. Spybot & MBAM don't find a single infected file, HijackThis doesn't show anything unusual, and none of the antivirus scans i've done (housecall, bitdefender, Avira, McAfee Quickscan or Vundo-specific tools) shows any sign of infection.

Yet the google/firefox ads continue. Once or twice per day. Annoying.

So any idea ? Could Firefox itself (or its old Google Toolbar, or even Java) have been corrupted, and thus not recognized as a virus/trojan ?

(in fact the only files that seem to have been modified or created around the time of the original incident are the - now empty - \spools\prtprocs\w32x86 folder, and a java plugin150_08.trace file...)

Thanks in advance.

Edited by tpr, 16 November 2009 - 04:03 PM.


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