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Infected with Trojan Horse after suddenly not having antivirus!


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#1 Loonycorn

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Posted 24 April 2016 - 06:17 AM

  This is my partner's computer and it's on Window's 7. Since I don't regularly use this computer and my partner isn't very software savvy I am unsure how long it's been without antivirus. A scan with AVG Zen found the following:

 

A broken digital signature from Microsoft (Microsoft Office)

A corrupted executable file in sysWOW64\mfc45

Adware 'PowerpointViewersetup' 

Adware from 'GoogleChrome'

And a trojan horse in 'Wild Tangent Games game Launcher'.

 

I am unsure if that is the extent of the infection or if scanning with a few different scanners may help.

 

Thanks in advance,

 

Sophie.



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#2 garioch7

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Posted 24 April 2016 - 07:17 AM

Looneycorn:

:welcome: to the Bleeping Computer Am I Infected? - What Do I Do? Forum. My name is Phil. I would like to address you by your first name if that is alright with you, since we will be working together.


I think that we should run a few preliminary security scans on your computer and see how seriously your partner's computer might be compromised by malware.

 


:step1: ESET Online Scanner using Internet Explorer:

Note 1: These instructions are for Internet Explorer only! If you're using Chrome or Firefox, you will need to download and install the ESET Smart Installer tool before it can scan. See instructions here.
Note 2: You will need to disable your currently installed Anti-Virus, how to do so can be found here.

*Click this link to open ESET OnlineScan.
* Place a checkmark next to "Yes, I accept the Terms of Use", then click the greenstart.png button.
* When prompted allow the Add-On/Active X to install.
* In the new window that opens, tic the radio button next to Enable detection of potentially unwanted applications.
* Then click "Advanced settings", and make sure there is a checkmark next to only the following items (uncheck everything else):

  • Remove found threats
  • Scan archives
  • Scan for potentially unsafe applications
  • Enable Anti-Stealth technology

*Then click the shieldstart.png button and ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
*When the scan completes, click List Found Threats (only if anything is found).
*Then click Export, and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
*Click back.png, then click finish.png to exit ESET Online Scanner.

Don't forget to re-enable your antivirus when finished!

 

 

:step2: Download and install Malwarebytes Anti-Malware:

Please download Malwarebytes Anti-Malware to your desktop.

  • Double-click mbam-setup-2.2.*.****.exe and follow the prompts to install the program ( * = program version numbers may vary - always get the latest version).
  • At the end, be sure a checkmark is placed next to the following:
    • Launch Malwarebytes Anti-Malware
    • A 14 day trial of the Premium features is pre-selected. You may deselect this if you wish, and it will not diminish the scanning and removal capabilities of the program.
  • Click Finish.
  • On the Dashboard, click the 'Update Now >>' link
  • After the update completes, click the 'Scan Now >>' button.
  • Or, on the Dashboard, click the Scan Now >> button.
  • If an update is available, click the Update Now button.
  • A Threat Scan will begin.
  • When the scan is complete, if there have been detections, click Apply Actions to allow MBAM to clean what was detected.
  • In most cases, a restart will be required.
  • Wait for the prompt to restart the computer to appear, then click on Yes.
  • After the restart once you are back at your desktop, open MBAM once more.
  • Click on the History tab > Application Logs.
  • Double click on the scan log which shows the Date and time of the scan just performed.
  • Click 'Copy to Clipboard
  • Paste the contents of the clipboard into your next reply.

 

 

I would like you to copy and paste the logs from both scans into your next reply. I will examine those and determine what our next step should be. If there is evidence of serious infection, you might have to open a new thread in the Virus, Trojan, Spyware and Malware Removal Logs Forum, but let's not get ahead of ourselves yet. Many less serious issues can be solved right here, in this Forum.

If I haven't responded to your reply in 24 hours, please send me a personal message.

Have a great day.

Regards,
-Phil

 


Graduate of the Bleeping Computer Malware Removal Study Hall


#3 LedaOhio

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Posted 24 April 2016 - 07:36 AM

Looneycorn:

:welcome: to the Bleeping Computer Am I Infected? - What Do I Do? Forum. My name is Phil. I would like to address you by your first name if that is alright with you, since we will be working together.


I think that we should run a few preliminary security scans on your computer and see how seriously your partner's computer might be compromised by malware.

 

:step1: ESET Online Scanner using Internet Explorer:

Note 1: These instructions are for Internet Explorer only! If you're using Chrome or Firefox, you will need to download and install the ESET Smart Installer tool before it can scan. See instructions here.
Note 2: You will need to disable your currently installed Anti-Virus, how to do so can be found here.

*Click this link to open ESET OnlineScan.
* Place a checkmark next to "Yes, I accept the Terms of Use", then click the greenstart.png button.
* When prompted allow the Add-On/Active X to install.
* In the new window that opens, tic the radio button next to Enable detection of potentially unwanted applications.
* Then click "Advanced settings", and make sure there is a checkmark next to only the following items (uncheck everything else):

  • Remove found threats
  • Scan archives
  • Scan for potentially unsafe applications
  • Enable Anti-Stealth technology

*Then click the shieldstart.png button and ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
*When the scan completes, click List Found Threats (only if anything is found).
*Then click Export, and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
*Click back.png, then click finish.png to exit ESET Online Scanner.

Don't forget to re-enable your antivirus when finished!

 

 

:step2: Download and install Malwarebytes Anti-Malware:

Please download Malwarebytes Anti-Malware to your desktop.

  • Double-click mbam-setup-2.2.*.****.exe and follow the prompts to install the program ( * = program version numbers may vary - always get the latest version).
  • At the end, be sure a checkmark is placed next to the following:
    • Launch Malwarebytes Anti-Malware
    • A 14 day trial of the Premium features is pre-selected. You may deselect this if you wish, and it will not diminish the scanning and removal capabilities of the program.
  • Click Finish.
  • On the Dashboard, click the 'Update Now >>' link
  • After the update completes, click the 'Scan Now >>' button.
  • Or, on the Dashboard, click the Scan Now >> button.
  • If an update is available, click the Update Now button.
  • A Threat Scan will begin.
  • When the scan is complete, if there have been detections, click Apply Actions to allow MBAM to clean what was detected.
  • In most cases, a restart will be required.
  • Wait for the prompt to restart the computer to appear, then click on Yes.
  • After the restart once you are back at your desktop, open MBAM once more.
  • Click on the History tab > Application Logs.
  • Double click on the scan log which shows the Date and time of the scan just performed.
  • Click 'Copy to Clipboard
  • Paste the contents of the clipboard into your next reply.

 

 

I would like you to copy and paste the logs from both scans into your next reply. I will examine those and determine what our next step should be. If there is evidence of serious infection, you might have to open a new thread in the Virus, Trojan, Spyware and Malware Removal Logs Forum, but let's not get ahead of ourselves yet. Many less serious issues can be solved right here, in this Forum.

If I haven't responded to your reply in 24 hours, please send me a personal message.

Have a great day.

Regards,
-Phil

 

 

 

Hello Phil! 

New here and if I may.. Your solution sounds great..
I've never used ESET and wonder if you have a link to a Standalone copy (handy) of it that I may install to a VM of mine to check out?

The only thing different I would have said above is to use AVAST boot time scan. It has been great for me in the past at cleaning house.

MalwareBytes is excellent and has never let me down. It finds lots that almost every scanner misses. .. AND even the free version is great. It may install its own type of "malware" for freeware reasons, but you can completely remove it after using it. I finally broke down and bought it after having to do that so often.
I've lost drives with every virus scanner there is out there over the years EXCEPT AVAST and it would be a tough sell to change my mind after such dependability.
 

Respectfully...



#4 garioch7

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Posted 24 April 2016 - 08:14 AM

LedaOhio:

 

Good day.  Are you associated with the Original Poster?  If not, I should bring to your attention that it is not considered good "netiquette" to "hijack" another person's topic.

 

I am not aware of a standalone copy of the ESET online scanner.  I can assure that you that the ESET online scanner is safe and thorough.  It is used here at Bleeping Computer daily to assist users with malware issues.

 

Malwarebytes Anti-Malware (MBAM), Free and Premium versions, do NOT install any "malware".  That would be completely contrary to Marcin's philosophy, just as Grinler would not permit malware, PUPs or adware to be bundled with Bleeping Computer downloads.

 

You should be aware that MBAM and anti-virus applications scan for different type of threats.  Ideally you should have both anti-virus and an anti-malware application, or have a product like Emsisoft that includes both.  So it is not that one or both apps are "missing" threats - they detect and remove different types of threats.  You can refer to this brief thread here by Quietman7 which explains the differences.

 

If you have more questions about security software, I recommend that you post in the Bleeping Computer Anti-Virus, Anti-Malware, and Privacy Forum, found here.

 

Have a great day.

 

Regards,

-Phil


Graduate of the Bleeping Computer Malware Removal Study Hall


#5 Loonycorn

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Posted 29 April 2016 - 02:26 AM

I am doing this today :) I tried to run ESET last night but it got too late and I didn't want to leave the computer on with no antivirus on it.

 

ESET found nothing :D

 

Nothing in MBAM either

 

Thank you for your help so far.


Edited by Loonycorn, 29 April 2016 - 06:51 AM.


#6 garioch7

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Posted 29 April 2016 - 08:59 AM

Loonycorn:
 
Thanks for your post.  That is good news that those scans were negative :thumbup2:  I would really have liked to see the logs, even if they were negative.  For example, the Malwarebytes log would have told me if you ran the scan with anti-rootkit scanning enabled, which is what I would like you to do, if it was not enabled.  I forgot to mention that in my instructions - sorry.


OK, let's run a few more scans ...


:step1: Please download AdwCleaner by Xplode and save the file to your Desktop.

  • Double click on AdwCleaner.exe to run the tool.
    Vista/Windows 7/8 users right-click and select Run As Administrator
  • The tool will start to update the database, please wait for it to complete the update.
  • Click on I Agree button.
  • Click on the Scan button.
  • AdwCleaner will begin...be patient as the scan may take some time to complete.
  • After the scan has finished, click on the Report button...a logfile (AdwCleaner[R#].txt) will open in Notepad for review (where the largest value of # represents the most recent report).
  • The contents of the log file may be confusing. Unless you see a program name that you know should not be removed, don't worry about it. If you see an entry you want to keep, let me know about it.
  • Copy and paste the contents of that logfile in your next reply.
  • A copy of all logfiles are saved in the C:\AdwCleaner folder which was created when running the tool.

If there are no files that you want to keep, then you can re-run the scan, but click on "Clean" instead of "Scan".



:step2: Please download Junkware Removal Tool to your desktop.

  • Shut down your protection software now to avoid potential conflicts.
  • Run the tool by double-clicking it. If you are using Windows Vista, 7, or 8; instead of double-clicking, right-mouse click JRT.exe and select "Run as Administrator".
  • The tool will open and start scanning your system.
  • Please be patient as this can take a while to complete depending on your system's specifications.
  • On completion, a log (JRT.txt) is saved to your desktop and will automatically open.
  • Post the contents of JRT.txt into your next message.

 

 

:step3: Please run an System File Checker (SFC) scan to assess the integrity of the Windows 7 file system.

  • Click on the "Start" button.
  • In the "search" box at the bottom, type cmd.
  • Look for Cmd.exe to appear at the top of the menu.
  • Right-click on cmd.exe and choose Run As Administrator.
  • Type sfc /scannow. Ensure that there is a space between "sfc" and "/scannow"
  • The scan will start and may take from 20 minutes to an hour to run.
  • Please report the results from the System File Checker in your next post.

 

 

Thank you and have a great day.

Regards,
-Phil


Graduate of the Bleeping Computer Malware Removal Study Hall





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