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Something is using system processes at high memory levels; Norton can't find it


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#1 CallMeCal

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Posted 28 August 2015 - 01:24 PM

Hi, quick warning, I'm highly experienced but not very knowledgeable when it comes to computers; I'm almost entirely self-taught and don't know a lot of terminology or how to do many things, but I do have significantly more experience than the average newbie, so I've probably approached things in weird ways and missed things that probably seem obvious to people who learned about computers in more conventional ways.

 

Anyway. The problem.

 

I noticed my computer was using way more memory than it usually did. I opened Task Manager and checked Processes, sorting by Memory Usage, and "regsvr32.exe" was using ~200 Megabytes of memory. I killed the process, but it started up again and creeped back up to ~200 MB of memory usage over the course of about 10 seconds. I Googled "regsvr32.exe high memory usage", found few results and most of them were confusing. So (and yes I realize this was stupid and dangerous) I went to the file, changed ownership to Me and gave myself editing permissions, then renamed it to "regsvr321.exe". Then I killed the process again, it didn't restart this time, and my computer still ran fine so I figured I was in the clear.

 

However, the next day my computer was running slowly again, so I opened Task manager again and this time "rundll32.exe" was using ~200 MB of memory. I looked closer, and realized I had two copies of rundll32.exe running, one of them at reasonable levels and the other one at ridiculous levels. But when I right clicked and hit "show file location", they both went to the same file. I Googled that, got nothing useful, renamed it and killed it the same way I had before, then downloaded and ran Norton Security at various levels of scanning; it found nothing useful.

 

Today, the same problem happened again, this time with "explorer.exe" which I can't just rename and hope for the best, so now I'm coming to you guys for help, since my previous Googlings led me here a couple times but nobody seemed to be having this problem, or else were given solutions that I didn't understand.

 

Clearly something else is hiding behind these programs to do things. Also, Norton caught an attack coming through explorer.exe from "scoring24.com Fiesta Exploit Kit Website" and managed to prevent it, but it still can't find the real source of the problem.

 

...Help?

 

Note: I'm using an hp laptop running Windows 7 Home Premium 32bit. Also, I have renamed regsvr32.exe and rundll32.exe back to their original names, and regsvr32.exe is the current culprit facade.


Edited by CallMeCal, 28 August 2015 - 03:52 PM.
Moved from MRL to Am I Infected - Hamluis.


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#2 Broni

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Posted 28 August 2015 - 07:13 PM

Welcome aboard p22002758.gif

 

p22002970.gif Download Security Check from here or here and save it to your Desktop.

  • Double-click SecurityCheck.exe
  • Follow the onscreen instructions inside of the black box.
  • A Notepad document should open automatically called checkup.txt; please post the contents of that document.


NOTE 1. If one of your security applications (e.g., third-party firewall) requests permission to allow DIG.EXE access the Internet, allow it to do so.
NOTE 2. SecurityCheck may produce some false warning(s), so leave the results reading to me.
NOTE 3. If you receive UNSUPPORTED OPERATING SYSTEM! ABORTED! message restart computer and Security Check should run

p22002970.gif Please download Farbar Service Scanner (FSS) and run it on the computer with the issue.
  • Make sure the following options are checked:
    • Internet Services
    • Windows Firewall
    • System Restore
    • Security Center/Action Center
    • Windows Update
    • Windows Defender
    • Other Services
  • Press "Scan".
  • It will create a log (FSS.txt) in the same directory the tool is run.
  • Please copy and paste the log to your reply.


p22002970.gif Please download MiniToolBox and run it.

Checkmark following boxes:
  • Report IE Proxy Settings
  • Report FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List Winsock Entries
  • List last 10 Event Viewer log
  • List Installed Programs
  • List Devices (do NOT change any settings here)
  • List Users, Partitions and Memory size
  • List Restore Points

Click Go and post the result.

p22002970.gif Please download Malwarebytes Anti-Malware (MBAM) to your desktop.
NOTE. If you already have MBAM 2.0 installed scroll down.

  • Double-click mb3-setup-1878.1878-3.5.1.2522.exe and follow the prompts to install the program.
  • 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.



If you already have MBAM 2.0 installed:

  • 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.


How to get logs:
(Export log to save as txt)


  • 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 'Export'.
  • Click 'Text file (*.txt)'
  • In the Save File dialog box which appears, click on Desktop.
  • In the File name: box type a name for your scan log.
  • A message box named 'File Saved' should appear stating "Your file has been successfully exported".
  • Click Ok
  • Attach that saved log to your next reply.



(Copy to clipboard for pasting into forum replies or tickets)

  • 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 reply.


p22002970.gifDownload 51a5f31352b88-icon_MBAR.pngMalwarebytes Anti-Rootkit (MBAR) to your desktop.
  • Warning! Malwarebytes Anti-Rootkit needs to be run from an account with administrator rights.
  • Double click on downloaded file. OK self extracting prompt.
  • MBAR will start. Click "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 located on your Desktop and paste the content of the following files in your next reply:
  • "mbar-log-{date} (xx-xx-xx).txt"
  • "system-log.txt"


NOTE. If you see This version requires you to completely exit the Anti Malware application message right click on the Malwarebytes Anti-Malware icon in the system tray and click on Exit.

p22002970.gif Please download Rkill (courtesy of BleepingComputer.com) to your desktop.
There are 2 different versions. If one of them won't run then download and try to run the other one.
You only need to get one of these to run, not all of them. You may get warnings from your antivirus about this tool, ignore them or shutdown your antivirus.

rKill.exe: http://www.bleepingcomputer.com/download/rkill/dl/10/
iExplore.exe (renamed rKill.exe): http://www.bleepingcomputer.com/download/rkill/dl/11/

  • Double-click on the Rkill desktop icon to run the tool.
  • If using Windows Vista, 7 or 8 right-click on it and choose Run As Administrator.
  • A black DOS box will briefly flash and then disappear. This is normal and indicates the tool ran successfully.
  • If not, delete the file, then download and use the one provided in Link 2.
  • Do not reboot until instructed.
  • If the tool does not run from any of the links provided, please let me know.


If normal mode still doesn't work, run the tool from safe mode.

When the scan is done Notepad will open with rKill log.
Post it in your next reply.

NOTE. rKill.txt log will also be present on your desktop.

NOTE Do NOT wrap your logs in "quote" or "code" brackets.
Do NOT use spoilers.
Do NOT edit your reply to post additional logs. Create new reply. I'll not get any email notifications about edits so I won't know you posted something new.


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