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Help! Backdoor access?


RMYoung3
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My kid was on a Discord server and was DM'd by someone he didn't know.  He made the mistake of accepting the friend request and then clicking on some link they put in their message. Now the person claims to have backdoor access to my kid's computer and has posted our town and state, IP address, etc.  The person is threatening to destroy the computer, etc. Though I have Malwarebytes on my computer, my kid's computer doesn't have it.  The computer is now offline.  What to do?  I'm happy to put Malwarebytes on the other computer, but I assume that if we get back online in order to download it, this person can then actually do something damaging, potentially.  True?

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  • Root Admin

Hello @RMYoung3 and :welcome:

Please keep your kids computer offline. From another computer please download the following software onto a USB thumb drive and transfer it to the other computer to run on or install from that disk.

Save all the logs back to the USB thumb drive and post them back here and we'll take a look and go from there. If you have any questions please let me know.

 

 

Please run the following steps and post back the logs as an attachment when ready.
Temporarily disable your antivirus or other security software first. Make sure to turn it back on once the scans are completed.
Temporarily disable Microsoft SmartScreen to download software below if needed. Make sure to turn it back on once the scans are completed.
If you still have trouble downloading the software please click on Reveal Hidden Contents below for examples of how to allow the download.

 

Spoiler
 
 
 
 
Spoiler

When downloading with some browsers you may see a different style of screens that may block FRST from downloading. The program is safe and used hundreds of times a week by many users.

Example of Microsoft Edge blocking the download

image.png

image.png

image.png

 



STEP 01

  • If you already have Malwarebytes installed then open Malwarebytes and click on the Scan button. It will automatically check for updates and run a Threat Scan.
  • If you don't have Malwarebytes installed yet please download it from here and install it.
  • Once installed then open Malwarebytes and select Scan and let it run.
  • Once the scan is completed make sure you have it quarantine any detections it finds.
  • If no detections were found click on the Save results drop-down, then the Export to TXT  button, and save the file as a Text file to your desktop or other location you can find and attach that log on your next reply.
  • If there were detections then once the quarantine has completed click on the View report button, Then click the Export drop-down, then the Export to TXT  button, and save the file as a Text file to your desktop or other location you can find and attach that log on your next reply.
  • If the computer restarted to quarantine you can access the logs from the Detection History, then the History tab. Highlight the most recent scan and double-click to open it. Then click the Export drop-down, then the Export to TXT  button, and save the file as a Text file to your desktop or other location you can find and attach that log on your next reply.
  • If Malwarebytes won't run then please skip to the next step and let me know in your next reply that the scanner would not run.

STEP 02

Please download AdwCleaner by Malwarebytes and save the file to your Desktop.

  • Double-click to run the program
  • Accept the End User License Agreement.
  • Wait until the database is updated.
  • Click Scan Now.
  • When finished, if items are found please click Quarantine.
  • Your PC should reboot now if any items were found.
  • After reboot, a log file will be opened. Attach or Copy its content into your next reply.

RESTART THE COMPUTER Before running Step 3

STEP 03
Please download the Farbar Recovery Scan Tool and save it to your desktop.

Note: You need to run the version compatible with your system. You can check here if you're not sure if your computer is 32-bit or 64-bit

  • Double-click to run it. When the tool opens, click Yes to disclaimer.
  • Press the Scan button.
  • It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
  • The first time the tool is run, it also makes another log (Addition.txt). If you've, run the tool before you need to place a check mark here each time
  • Please attach the Additions.txt log to your reply as well.
  • On your next reply, you should be attaching frst.txt and additions.txt to your post, every time.

 

Thanks

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  • Root Admin

Thanks for the logs @RMYoung3

Please go to Control Panel, Programs, Programs and Features and uninstall the following. Please keep the computer off of the Internet for now.

Discord

 

 

The computer does not appear to be fully setup and operational with all the proper drivers. We can attempt to correct that when we're done checking and possibly cleaning the computer.

 

==================== Faulty Device Manager Devices ============

Name:
Description:
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name:
Description:
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name:
Description:
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name: PCI Memory Controller
Description: PCI Memory Controller
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name: SM Bus Controller
Description: SM Bus Controller
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name: PCI Data Acquisition and Signal Processing Controller
Description: PCI Data Acquisition and Signal Processing Controller
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

Name: PCI Data Acquisition and Signal Processing Controller
Description: PCI Data Acquisition and Signal Processing Controller
Class Guid:
Manufacturer:
Service:
Problem: : The drivers for this device are not installed. (Code 28)
Resolution: To install the drivers for this device, click "Update Driver", which starts the Hardware Update wizard.

 

 

Please save the attached FIXLIST.txt file to the same USB thumb drive you have the Farbar program running from.

Then place the USB thumb drive in the affected computer again and run the Farbar program again and click on the FIX button

fixlist.txt


NOTE. It's important that both files, FRST or FRST64, and fixlist.txt are in the same location or the fix will not work.

Please make sure you disable any real-time antivirus or security software before running this script. Once completed, make sure you re-enable it.

NOTICE: This script was written specifically for this user, for use on this particular machine. Running this on another machine may cause damage to your operating system that cannot be undone.

Run FRST or FRST64 and press the Fix button just once and wait.
If the tool needs a restart please make sure you let the system restart normally and let the tool complete its run after restart.
The tool will make a log on the Desktop (Fixlog.txt) or wherever you ran FRST from. Please attach or post it to your next reply.

Note: If the tool warned you about an outdated version please download and run the updated version.

NOTE-1:  This fix will run a scan to check that all Microsoft operating system files are valid and not corrupt and attempt to correct any invalid files. It will also run a disk check on the restart to ensure disk integrity. Depending on the speed of your computer this fix may take 30 minutes or more.

NOTE-2: As part of this fix all temporary files will be removed. If you have any open web pages that have not been bookmarked please make sure you bookmark them now as all open applications will be automatically closed. Also, make sure you know the passwords for all websites as cookies will also be removed. The use of an external password manager is highly recommended instead of using your browser to store passwords.

NOTE-3: As part of this fix it will also reset the network to default settings including the firewall. If you have custom firewall rules you need to save please export or save them first before running this fix.

The following directories are emptied:

  • Windows Temp
  • Users Temp folders
  • Edge, IE, FF, Chrome, and Opera caches, HTML5 storages, Cookies and History
  • Recently opened files cache
  • Flash Player cache
  • Java cache
  • Steam HTML cache
  • Explorer thumbnail and icon cache
  • BITS transfer queue (qmgr*.dat files)
  • Recycle Bin

Important: items are permanently deleted. They are not moved to quarantine. If you have any questions or concerns please ask before running this fix.

The system will be rebooted after the fix has run.

 

Post back the FIXLOG.TXT file when done.

 

Thank you

 

 

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  • Root Admin

Great that log looks good. @RMYoung3

I don't think the computer is infected but let's go ahead and check with another 3rd party scanner just to make sure before we do any updates to the computer for the drivers, etc.

 

 

Let me have you run a different scanner to double-check. I don't expect it to find anything, but no harm in checking.

I would suggest a free scan with the ESET Online Scanner

Go to https://download.eset.com/com/eset/tools/online_scanner/latest/esetonlinescanner.exe

  • It will start a download of "esetonlinescanner.exe"
  • Save the file to your system, such as the Downloads folder, or else to the Desktop.
  • Go to the saved file, and double click it to get it started. 
  • When presented with the initial ESET options, click on "Computer Scan".
  • Next, when prompted by Windows, allow it to start by clicking Yes 
  • When prompted for scan type, Click on Full scan 
  • Look at & tick  ( select )   the radio selection "Enable ESET to detect and quarantine potentially unwanted applications"   and click on the Start scan button.
  • Have patience.  The entire process may take an hour or more. There is an initial update download.
  • There is a progress window display.
  • You should ignore all prompts to get the ESET antivirus software program.   ( e.g. their standard program).   You do not need to buy or get or install anything else.
  • When the scan is completed, if something was found, it will show a screen with the number of detected items.  If so, click the button marked “View detected results”.
  • Click The blue “Save scan log” to save the log.
  • If something was removed and you know it is a false finding, you may click on the blue ”Restore cleaned files”  ( in blue, at the bottom).
  • Press Continue when all done.  You should click to off the offer for “periodic scanning”.

 

Note: If you do need to do a File Restore from ESET please follow the directions below

[KB2915] Restore files quarantined by the ESET Online Scanner version 3

https://support.eset.com/en/kb2915-restore-files-quarantined-by-the-eset-online-scanner

 

Thanks

 

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  • Root Admin

You most certainly need antivirus - the VPN is optional. It does help protect your real IP and it also stops logging of every site you visit, etc.

I would suggest that you make sure that all computers in the house are up to date running the latest updates of from Microsoft. Windows 11 is out now but it seems to be having a few issues so might want to hold off on that for now.

Many users enable both Malwarebytes premium along with Windows Defender so that there is a layered approach to making sure threats are detected, stopped, and removed.

 

Let me get a new set of Farbar logs for this computer and we'll see about installing, updating the proper drivers for it that seemed to be missing.

 

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  • 3 months later...
  • Root Admin

Due to the lack of feedback, this topic is closed to prevent others from posting here.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this topic. Other members who need assistance please start your own topic in a new thread.

Tips to help protect from infection

Thanks

 

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