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Bitcoin.Trojan.Miner.DDS keeps coming back as DLLHost.exe and MSDLLHelper


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About 2 weeks ago I downloaded Internet Download Manager patch from a suspicious site and after that I have been noticing COMSurrogate process taking up about 20% of CPU usage in task manager. I ran Malwarebyte and it detected 2 malware, one registry item called MSDLLHelper under HKU\S-1-5-21-2376670492-3024356693-3209832367-1001\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN|MSDllHelper and a program call DLLHost.exe under C:/User/danny/Appdata/Roaming/DLL/Dllhost.exe. I have since uninstalled Internet download manager and quarantined the malwares but every time I boot up my PC this 2 malware will show up again and I had to quarantine and delete them again.

Is there any way to remove them for good and prevent them from spawning again? I understand I need to attach some logs and the fix scripts from other posts are user specific, please assist me with the process, thanks. 

Screenshot is attached below.

2092293799_Screenshot2021-02-03121743.png.39e203be27c1a3ede5b2cabbc0c5b610.png

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Hello DCX9 and welcome to Malwarebytes,

Continue with the following:

Open Malwarebytes, select > small cog wheel top right hand corner, that will open "settings" from there select "Security" tab.

Scroll down to "Scan Options" ensure Scan for Rootkits and Scan within Archives are both on....

Clsoe out the settings window, this will take you back to "DashBoard" select the Blue "Scan Now" tab......

When the scan completes quarantine any found entries...

To get the log from Malwarebytes do the following:
 
  • Click on the Detection History tab > from main interface.
  • Then click on "History" that will open to a historical list
  • Double click on the Scan log which shows the Date and time of the scan just performed.
  • Click Export > From export you have two options:
    Copy to Clipboard - if seleted right click to your reply and select "Paste" log will be pasted to your reply
    Text file (*.txt) - if selected you will have to name the file and save to a place of choice, recommend "Desktop" then attach to reply

     
  • Please use "Text file (*.txt), then name the file and save to a place of choice, recommend "Desktop" then attach to reply


Next,

Download AdwCleaner by Malwarebytes onto your Desktop.

Or from this Mirror
 
  • Right-click on AdwCleaner.exe and select http://i.imgur.com/Spcusrh.pngRun as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users)
  • Accept the EULA (I accept), then click on Scan
  • Let the scan complete. Once it's done, make sure that every item listed in the different tabs is checked and click on the Quarantine button. This will kill all the active processes
  • Once the cleaning process is complete, AdwCleaner will ask to restart your computer, do it
  • After the restart, a log will open when logging in. Please copy/paste the content of that log in your next reply


Next,

Download Farbar Recovery Scan Tool and save it to your desktop.

Alternative download option: http://www.techspot.com/downloads/6731-farbar-recovery-scan-tool.html

Note: You need to run the version compatible with your system (32 bit or 64 bit). If you are not sure which version applies to your system download both of them and try to run them. Only one of them will run on your system, that will be the right version.

If your security alerts to FRST either, accept the alert or turn your security off to allow FRST to run. It is not malicious or infected in any way...

Be aware FRST must be run from an account with Administrator status...
 
  • Double-click to run it. When the tool opens click Yes to disclaimer.(Windows 8/10 users will be prompted about Windows SmartScreen protection - click More information and Run.)
  • Make sure Addition.txt is checkmarked under "Optional scans"
    user posted image
     
  • Press Scan button to run the tool....
  • It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
  • The tool will also make a log named (Addition.txt) Please attach that log to your reply.


Let me see those logs in your reply...

Thank you,

Kevin....
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Thanks for your reply. The logs are attached below.

Addition.txtFRST.txtAdwCleaner[C01].txtmwb_log.txt

One thing to note is that before I posted here, I did a scan with FRST and both DLLHost.exe and MSDLLHelper and the paths were in the [whitelisted] section in the FRST text file but after doing all the steps above and the new overwritten FRST.txt no longer have the 2 malware paths in it.

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  • Solution

Hiya DCX9,

Thanks for those logs, continue:

Please download the attached fixlist.txt file and save it to the Desktop or location where you ran FRST from.

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

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 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.

user posted image

The system will be rebooted after the fix has run.

Next,

Download "Microsoft's Safety Scanner" and save direct to the desktop

Ensure to get the correct version for your system....

https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download


Right click on the Tool, select Run as Administrator the tool will expand to the options Window
In the "Scan Type" window, select Quick Scan
Perform a scan and Click Finish when the scan is done.


Retrieve the MSRT log as follows, and post it in your next reply:

1) Select the Windows key and R key together to open the "Run" function
2) Type or Copy/Paste the following command to the "Run Line" and Press Enter:

notepad c:\windows\debug\msert.log

The log will include log details for each time MSRT has run, we only need the most recent log by date and time....

Let me see those logs in your reply..

Thank you,

Kevin

fixlist.txt

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Hi Kevin,

Seems all good for now, malwarebyte scan shows no threat even after multiple reboot. I will keep monitoring it for a few more days.  

However, I was checking the path C:\Users\danny\AppData\Roaming\Dll (where the dllhost.exe were at) and found that there is a file named WinRing0x64.sys now. Should I be concern about this? as I am pretty sure it wasn't there before. 

Anyway, thanks for the help. Really appreciate it. I will update here if the problem reoccur. 

Thanks.

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Hiya DCX9,

I guess we can class that file as legitimate and therefore safe.. I see you have Windows Defender currently disabled, that happens by default when Malwarebytes Premium is installed. I recommend that you turn WD back on, they will both work well together and give you better protection.

To turn defender back on, open Malwarebytes, select the cog wheel top right corner, in the new window select the "Security" tab, scroll to "Windows Security Center" to the right move the slider from right to left. That will renable Windows Defender...

Next,

Right click on FRST here: D:\Users\Danny\Downloads\FRST.exe and rename uninstall.exe when complete right click on uninstall.exe and select "Run as Administrator"

If you do not see the .exe appended that is because file extensions are hidden, in that case just rename FRST to uninstall

That action will remove FRST and all created files and folders...

Next,

Remove all System Restore Points: https://www.tenforums.com/tutorials/33593-delete-system-restore-points-windows-10-a.html#option2

Create clean fresh Restore Point: http://www.thewindowsclub.com/create-system-restore-point

Run Windows Disk Clean Up Utility - https://neosmart.net/wiki/disk-cleanup/

Condsider the following:

Malwarebytes Browser Guard (Free) for Firefox: https://addons.mozilla.org/en-GB/firefox/addon/malwarebytes/

Malwarebytes Browser Guard (Free) for Chrome: https://chrome.google.com/webstore/detail/malwarebytes-browser-guar/ihcjicgdanjaechkgeegckofjjedodee

PatchMyPC, keep all your software upto date - https://patchmypc.com/home-updater#download

From there you should be good to go...

Next,

Read the following links to fully understand PC Security and Best Practices, you may find them useful....

Answers to Common Security Questions and best Practices

Do I need a Registry Cleaner?

Take care and surf safe

Kevin... user posted image

mbwd2.JPG

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Glad we could help.

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 thread. Other members who need assistance please start your own topic in a new thread.

Please review the following for Tips to help protect from infection

Thank you

 

 

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