dllhost surrogate infected

[Lam An]

Hi,

I am having the same problem with many other people. dllhost.exe surrogate keeps appearing in my task manager, occupying a huge amount of memory and causing my computer to crash. Please help!

I scanned with Farbar Recovery and attached the log files.

Thank you so much in advance!

 

[argus]

Helllo,

My name is Argus and and I will be helping you with your computer problems.

Before we begin, please note the following:

• I will working be on your Malware issues, this may or may not, solve other issues you have with your machine.
• The logs can take some time to research, so please be patient with me.
• Stay with the topic until I tell you that your system is clean. Missing symptoms does not mean that everything is okay.
• Instructions that I give are for your system only!
• Please do not run any tools until requested ! The reason for this is so I know what is going on with the machine at any time. Some programs can interfere with others and hamper the recovery process.
• Please perform all steps in the order received. If you can't understand something don't hesitate to ask.
• Again I would like to remind you to make no further changes to your computer unless I direct you to do so. I will not help you if you do not follow my instructions.

Download

Malwarebytes Anti-Rootkit to your desktop.

• Double-click the icon to start the tool.
• It will ask you where to extract it, then it will start.
• Warning! Malwarebytes Anti-Rootkit needs to be run from an account with administrator rights.
• Click in the introduction screen "next" to continue.
• Click in the following screen "Update" to obtain the latest malware definitions.
• Once the update is complete select "Next" and click "Scan".
• When the scan is finished and no malware has been found select "Exit".
• If malware was detected, make sure to check all the items and click "Cleanup". Reboot your computer.
• Open the MBAR folder and paste the content of the following files in your next reply:
  • "mbar-log-{date} (xx-xx-xx).txt"
  • "system-log.txt"

Scan with Farbar Recovery Scan Tool

Please re-run Farbar Recovery Scan Tool to give me a fresh look at your system.

• Right-click on
  
  icon and select
  
  Run as Administrator to start the tool.
  (XP users click run after receipt of Windows Security Warning - Open File).
• Make sure that Addition option is checked.
• Press Scan button and wait.
• The tool will produce two logfiles on your desktop: FRST.txt and Addition.txt.

Please include their content into your next reply.

 

[Lam An]

Hi,

Thank you for the reply. I attached the files requested here. Malwarebytes did not find any malwares. Farbar Recovery keep notifying me that the file Windows Defender is corrupted and unreadable. Is that caused by the virus too?
I don't see many dllhost file running at the same time, just one, but it keeps increasing in size until my computer crashes. I choose end process then it resumes to normal again but it will appear again from time to time. I have to keep ending processes. Look forward to your reply soon.

 

[argus]

Fix with Farbar Recovery Scan Tool

This fix was created for this user for use on that particular machine.

Running it on another one may cause damage and render the system unstable.

​

Download attached fixlist.txt file and save it to the Desktop:

Both files, FRST and fixlist.txt have to be in the same location or the fix will not work!

• Right-click on
  
  icon and select
  
  Run as Administrator to start the tool.
  (XP users click run after receipt of Windows Security Warning - Open File).
• Press the Fix button just once and wait.
• If for some reason the tool needs a restart, please make sure you let the system restart normally. After that let the tool complete its run.
• When finished FRST will generate a log on the Desktop, called Fixlog.txt.

Please attach it to your reply.



Windef does not work because you have Kaspersy. Windefender is blocked.

 

[Lam An]

Hi,

I ran the fix and my computer reboot. After the reboot, I still see the dllhost.exe increasing in size rapidly in the Windows Task Manager. I attached the fixlog. It does not seem to work though.

Lam

 

[Lam An]

I saw a reply notification but when I came in here I did not see the post. Do I need to run Malwarebytes again and send you the log?

 

[argus]

How many takes up CPU?

 

[argus]

dllhost.exe is a legitimate file.

How's your computer behaving now?

 

[Lam An]

They will slowly increase. I am looking right now at 800,000k, CPU usage 80% and it is still increasing. I saw it over 1,000,000 once. Then my computer will crash.

 

[Lam An]

But in the description it says COM Surrogate. And now it takes over 1000000k memory. Is that normal? I did not see that happening before two days ago when my machine was infected.

 

[argus]

Scan with ComboFix

This is a very powerful tool that should be used only if advised by Malware Analyst.
Do not run ComboFix on your own!

Referring to this instruction, please download ComboFix by sUBs and save it to your desktop.
Temporary disable your AntiVirus and AntiSpyware protection - instructions here.

• Right-click on
  
  icon and select
  
  Run as Administrator to start the tool.
• Accept the disclaimer and agree if prompted to install Recovery Console.
• Do not take any actions while ComboFix goes through your System - it may cause it to stall!
• This scan may take some time!
• When finished - it will display a logfile (located also on your main drive, usually C:\ComboFix.txt).

Include that log in your next reply.

If you'll encounter any issues with internet connection after running ComboFix, please visit this link.

If an error about operation on the key marked for deletion will appear after running the tool, please reboot your machine.

 

[Lam An]

I attached the log file. The dllhost surrogate is still there from time to time, crashing my computer. Seem like my machine is really heavily infected. I am freaking out. Can I ever clean that thing out? Please check for me.

Thank you

 

[Lam An]

I attached the screenshot for you to see. dllhost surrogate keeps consuming more and more. Last time I saw it reached 2,000,000K then my laptop crashed. I selected end process and it reappeared after a while.

Lam

 

[Lam An]

Hi,

Now the file dllhost is acting ok, but explorer.exe is the one consuming memory like crazy now.