Trend Micro online scan

Avast Free Antivirus / Premium Security
1

I just did an online scan with HouseCall from TrendMicro online scan. During it’s scan (10 mins into it), Avast alerted me to 2 trojan files that it detected; I put it into the Chest (win32_trojan-gen (Other). I did not disable Avast during this online scan because I feel safer with a backup scanner. I thought it was odd that 2 trojans were detected during Trend Micro’s online scan and I haven’t had an Avast alert for almost 2 weeks now, using JUST it.

Would anyone have any thoughts about online scanners possibly putting a virus or virus decoy on a machine it’s scanning just to show how ‘alert’ it is? in this case Avast caught it?

Just wondering if anyone has had any suspect thoughts in that area. Thanks! katy

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What files where marked as being infected and what are the original locations of them?

Would anyone have any thoughts about online scanners possibly putting a virus or virus decoy on a machine it's scanning just to show how 'alert' it is?
No they don't do that. (At least not the trusted ones like Trend, McAfee, Symantec, Avast etc)
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No,online scan just triggered avast! On-Access(Standard Shield) module on those files (because online scanner accessed them). You can get similar scenario when you check with Ad-aware.

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katy98, I believe what has happened in your case is that there were two trojans lurking on your computer, but they were lurking in a place on your hard drive that you don’t access often. Avast! would only detect these trojans if you had tried to run them, or opened the folder containing them. Like RejZoR said, the Housecall scan would only have triggered avast! because because it was accessing the files at the time.

TrendMicro is a reputable antivirus vendor. They would not “plant” viruses or trojans on your machine just to impress you with their product’s scanning ability.

If you use online scans, stick to the major names in the antivirus industry. Alternatives include: BitDenfender (http://www.bidefender.com/scan), Panda (http://www.pandasoftware.com/activescan/com/activescan_principal.htm), Norton (http://www.symantec.com/securitycheck/) and McAfee (http://uk.mcafee.com/root/mfs/default.asp?cid=11211). Try to avoid online scans from companies you have never heard of - they may lure you in to thinking that they will scan your computer for viruses, but in actual fact, they can install spyware and trojans.

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Eddy, you asked What files where marked as being infected and what are the original locations of them?

The file name in both instances was: V364FHa02820 and the path in both instances was: F:\DOCUME~1\katy\LOCALS~1\Temp\V364FHa02820.

This path was included in the Avast Virus scan ( following an AVS update & program update) that I did just prior to the online scan. That’s what is so confusing…