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Restore files from ComboFix quarantine


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#1 wasabi-warrior

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Posted 30 September 2013 - 08:31 PM

Hello! One of our customers ran into the CryptoLocker virus (oh joy..), which we isolated the particular machine, and have been restoring their files from backup. Thats all well and good. We contact the antivirus company and escalated a case, as it not only let CryptoLocker through, it wouldnt remove it when even performing an ondemand scan. They woud like a copy of said virus.

 

The virus was removed with ComboFix ourselves (I am aware there are risks to performing it myself, the files were backed up and we were prepared to do a complete reinstall if need be, and im still prepared to be hit with the disclaimer as a new member of this forum ;) so all i need to do is restore the virus from quarantine on the isolated PC, and make a copy of them in a passworded zip file.

 

Can someone please provide clear directions for restoring files from quarantine with the latest versions of ComboFix? Thankyou.



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#2 quietman7

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Posted 01 October 2013 - 08:25 AM

As part of its routine ComboFix creates a folder named Qoobox in C:\QooBox\Quarantine\ to keep files that have been removed by ComboFix. These files are copied and renamed by adding .vir at the end so they are are no longer a threat. The path to the removed file(s) in the C:\QooBox\Quarantine folder shows the location where it was removed from. In some case, ComboFix may remove a legitimate file for various reasons. To restore a file, just remove the .vir and copy it back to its original location.

There is also a way to restore files from quarantine which requires using a special script prepared by a trained helper after reviewing ComboFix.txt.

Keep in mind that if you restore a file which appears legitimate but is in fact malicious, you will be restoring malware on the computer. If you deliberately restore a known malicious file, you assume all risk for any further damage it may cause. If you do not feel comfortable restoring the files on your own or you were dealing with a serious infection, then you can ask for further assistance with disinfection and restoration of removed files. However, we cannot do that in this forum. If you want individual assistance, please let me know I will provide instructions for where and how to do that.
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