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Microsoft Live Essentials detected the following items today:

Exploit: Java/CVE-2010-0840.HH VirTool:


TrojanDownloader: Java/OpenConnection.OU

It's since cleaned these items and I've now downloaded the latest definitions and have also initiated a full scan (using MS Live Essentials). I'm also running a full scan using Webroot's Spy Sweeper.

I'm quite paranoid about the effects of these detections and I'm wonder if I should simply reformat my machine?

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migrated from Sep 24 '11 at 19:08

This question came from our site for system and network administrators.

Are you a sysadmin? Why not just re-image this machine and move on? – jscott Sep 24 '11 at 16:52
No. But I'll have to talk to my sysadmin. I just a ton of data on this machine that will take a significant chunk of time to back up. The question basically is to find out which option is better: Option 1 - Faster, but let the AV/Spyware programs do their thing. Option 2 - Slower, back up, migrate the data, clean up and re-image the machine. Time is important here, so I'd like to know your thoughts. – Ray Sep 24 '11 at 17:12
@techie007, they are not asking how to disinfect, but if it is a trusted PC after disinfection and should they clean install the OS. – Moab Sep 25 '11 at 3:21
up vote 2 down vote accepted

If the compromise was on the administrator level, then you can't assume the system is trusted anymore (any files could have been modified to put a back door, change behavior, etc.) So to be thorough you would have to re-install.

If the compromise was on the user level, then you can just delete/re-add the user.

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