Solved Several dllhost.exe / com surrogate in task manager

House

New Member
Joined
Oct 27, 2014
Messages
5
#1
Hello, I've had several warnings by Norton Security Suite within the past week or two that a trojan has been blocked. However, after the latest trojan block, I soon after received a warning from Norton that COM SURROGATE was using a lot of memory. Upon checking task manager, I counted at least (10) dllhost.exe (com surrogate) in the list. I did a system restore to several days before. So far I haven't noticed any ill effects, but ask for help to determine if I am indeed trouble free. Thank you in advance!
 
Operating System
Windows 7
Are you using a 32-bit or 64-bit operating system?
64-bit (x64)
Infection date and initial symptoms
10/27/14 - Norton Security Suite V21.6.0.32 reported that it blocked a trojan. Soon after, Norton reported a high memory usage by COM SURROGATE. I checked the task manager to find that at least (10) instances of dllhost.exe (com surrogate) were running.
Current issues and symptoms
none
Steps taken in order to remove the infection
performed a system restore to 10/22/14

Attachments

TwinHeadedEagle

Removal Expert
MalwareTips Staff
Joined
Mar 8, 2013
Messages
22,271
OS
Windows 10
Antivirus
ESET
#2
Hello,



They call me TwinHeadedEagle around here, and I'll be working with you.



Before we start please read and note the following:
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  • Please do not run any tools other than the ones I ask you to, when I ask you to. Some of these tools can be very dangerous if used improperly. Also, if you use a tool that I have not requested you use, it can cause false positives, thereby delaying the complete cleaning of your machine.
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  • I visit forum several times at day, making sure to respond to everyone's topic as fast as possible. But bear in mind that I have private life like everyone and I cannot be here 24/7. So please be patient with me. Also, some infections require less, and some more time to be removed completely, so bear this in mind and be patient.
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  • Please attach all report using
    button below. Doing this, you make it easier for me to analyze and fix your problem.

  • Do not ask for help for your business PC. Companies are making revenue via computers, so it is good thing to pay someone to repair it.
  • If I don't hear from you within 3 days from this initial or any subsequent post, then this thread will be closed.




Scan with TDSSKiller

Please download TDSSKiller by Kaspersky and save it to your desktop.

  • Right-click on
    icon and select
    Run as Administrator to start the tool.
  • Click on Change parameters and put a checkmark beside Loaded modules. A reboot will be needed to apply the changes, allow it to do so.
  • Your machine may appear very slow and unusable after that - it's normal.
  • TDSSKiller will run automaticaly. Click on Change parameters and click OK.
  • Click the Start Scan button and wait patiently.

If anything will be found follow this guidelines:
  • If a suspicious object is detected, the default action will be Skip, click on Continue.
  • If malicious objects are found, they will show in the Scan results - Select action for found objects and offer three options.
    Ensure Cure (default) is selected, then click Continue > Reboot now to finish the cleaning process.
    If Cure is not available, please choose Skip instead.
  • Do not choose Delete unless instructed!

A report will be created in your root directory, (usually C:\ drive) in the form of TDSSKiller.[Version]_[Date]_[Time]_log.txt. Please include the contents of that file in your next post.




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.
 

TwinHeadedEagle

Removal Expert
MalwareTips Staff
Joined
Mar 8, 2013
Messages
22,271
OS
Windows 10
Antivirus
ESET
#4
This looks okay. Let's make fresh scan with FRST

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.
 

House

New Member
Joined
Oct 27, 2014
Messages
5
#7
It seems to be working good. Just out of curiosity, did you spot something in the initial scans that is now gone?
 

House

New Member
Joined
Oct 27, 2014
Messages
5
#9
It seemed to be back to normal since I performed the system restore prior to starting this thread. However, I thought it best just to make sure. I greatly appreciate you taking the time to help me out! I'll be sending you some beer money for your efforts. Thanks again!
 
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