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Combofix download/verification problem


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#1 RexRagnar

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Posted 12 September 2017 - 08:19 PM

Having used Combofix previously for over a year, I tried downloading the current version from a couple of the usual sites.  This was on Sept 11, 2017 and both times on both sites, I was redirected to download and install a program called Plumbware.  The popup message also said that Combofix did not work on Windows 10xx and that they recommended (supposedly representing Combofix) running that program.  The program had a direct download link, which did not seem right.

 

Suspicious of this, I did not proceed with their suggestion.

 

I did however run Malwarebytes ADWcleaner and it took 3 passes to finally get a clear report from the program.  The first two runs reported over 32 incidences of probable contamination. 

 

Today I went to the same sites and was able to dl a file that says it is ComboFix.exe, no popup this time (today is Sept 12, 2017) and so I downloaded the file.  The file details are:  ComboFix NSIS Installer, file version: 17.9.1.1, Copyright: sUBs, size: 5.39MB.

 

However when attempting to run what seems to be a legit copy of ComboFix, Windows User Account Control reports that the Publisher of this file is Unknown.  (the system is running Win 7 Ultimate)

How do I tell if this is a legit copy of ComboFix ?

 

I have had excellent results using ComboFix before, but now I am concerned that there is some sort of potential interference going on.

Any and all advice will be appreciated.

 

Thank you!

 

 

 

 



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#2 quietman7

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Posted 13 September 2017 - 02:21 PM

The official site for downloading ComboFix is provided in the authorized Guide and tutorial on How to use ComboFix. The link in that guide redirects to ComboFix Download page hosted by BleepingComputer.

 

Once you double-click on the icon, you may see a screen similar to the one below.

open-file-warning.jpg

Windows is issuing this prompt because ComboFix does not have a digital signature. This is perfectly normal and safe and you can click on the Run button to continue...

 

There are a number of unofficial sites which host various unauthorized versions of ComboFix (many of which are outdated) or imitations which claim to be ComboFix but redirect to downloading questionable software instead. For example, ComboFix.org and ComboFixdownload.com offer unauthorized versions but are not affiliated with the legitimate tool created by sUBs.


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#3 RexRagnar

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Posted 14 September 2017 - 03:47 PM

Thank you Quietman7 - now that starts to make a lot of sense to me.  I will get rid of the other copies of ComboFix, download the one you indicate and will run that and see what the outcome is.

 

Rex



#4 quietman7

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Posted 14 September 2017 - 04:23 PM

You're welcome and good luck.
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