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Odd behavior during scan of an infected machine


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I experienced an odd behavior during a scan of an infected machine. While scanning (and finding thousands of threats - mostly PUPs but at least one Trojan) I would be prompted that to continue to remove the malware I needed to reboot. This is normal after the scan is completed, you are prompted with what to do with threats found, and finally selected actions are compleated. But this prompt came up before the scan finished. If the system is rebooted the scan is essentially ended before any action is taken on the threats. If scan was restarted it would find the same threats in the same locations as before.

Is this something that others have see before?

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Hello @jmckeand    :welcome:

I have moved your post to the malware-removal-help section.

The Malwarebytes for Windows has mechanisms to queue up work that needs to be done for removals.  Please follow all the prompts as they happen.  Do all suggestions.

The message is not odd.   then after the actions are all completed, I need for you to run the support tool for the Gather Logs  as listed  under the first Reveal of the first reply to your post.  I will guide you later as we go along.

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In the many years (decades) of IT work I have never had a AV/Malware removal product prompt for a reboot while still in the detection phase of a scan. Generally you have a removal phase after detections are complete. Finally reboots are generally needed to complete the removal. The reboot prompt during the detection phase made me think that something was amiss. Every product I have used generally has 6 phases: Set Options, Detection Scan, Prompt for Action (unless automatic actions are set in Options), Removal (with possible reboot), Verify, and Report Results.

I will gather logs as soon as I can.

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Before we move the post, since I notice the last scan had found "PUP.Optional.Webbar"

I would suggest to do a follow-up scan with the Adwcleaner tool, to do a seperate scan for other potential adwares.

Be sure you close all web browsers before you click on the "Scan" button on this next procedure.

I  would suggest to download, Save, and then run Malwarebytes ADWCLEANER.

Please close Chrome and all other open web browsers after you have saved the Adwcleaner and before you start Adwcleaner scan.

Adwcleaner  detects factory Preinstalled applications too!

 

Please download  Malwarebytes AdwCleaner  https://downloads.malwarebytes.com/file/adwcleaner
 

Be sure to Save the file first, to your system.  Saving to the Downloads folder should be the default on your system.

 

Go to the folder where you saved Adwcleaner. Double click Adwcleaner  to start it.

At the prompt for license agreement, review and then click on I agree.

 

You will then see a main screen for Adwcleaner. ( if you do not see it right away, minimized the other open windows, so you can see Adwcleaner).

Then click on Dashboard button.

Click the blue button "Scan Now".

 

allow it a few minutes to finish the Scan.   Let it remove what it finds.

NOTE:  When it comes to the section "

Pre-installed applications

 

You can skip that.

Please find and send the Adwcleaner "C" clean report.

In Adwcleaner, click the "Reports" button.  Look at the list of reports for the latest date & type "Clean".

Double Click that line & it will open in Notepad.   Save the file to your system and then Attach that with your reply.

 

That C clean report will be the one with the most recent Date and time at folder  C:\AdwCleaner\Logs

Sincerely.

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Nice Catch. I did not think to run AdwCleaner and it found a couple of additional PUPs.

But, this post was originally about the behavior of the scan being interrupted and jumping to the end of the normal process. Which even AdwCleaner followed the normal process as outlined in my above post.

21 hours ago, jmckeand said:

In the many years (decades) of IT work I have never had a AV/Malware removal product prompt for a reboot while still in the detection phase of a scan. Generally you have a removal phase after detections are complete. Finally reboots are generally needed to complete the removal. The reboot prompt during the detection phase made me think that something was amiss. Every product I have used generally has 6 phases: Set Options, Detection Scan, Prompt for Action (unless automatic actions are set in Options), Removal (with possible reboot), Verify, and Report Results.

I will gather logs as soon as I can.

 

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There is no mention by you of what PUP's were found & removed by Adwcleaner.  And since you did not attach its log, I take it you only wish to return this thread to the Malwarebytes for Windows sub-forum.

This thread/topic is moved back to Malwarebytes For Windows.

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