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SFC /scannow indicating malware.


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3 replies to this topic

#1 Thelps

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Posted 24 March 2016 - 10:27 PM

Hi all,

 

I'll list my symptoms, found malware and what I've done so far to  diagnose / fix the problem.

 

Symptoms:

 

After running SFC /scannow I receive the following message:

 

Windows Resource Protection found corrupt files but was unable to fix some of them.

 

What I've done so far to ascertain that this is caused by malware:

 

- I started by running DISM /online /cleanup-image /restorehealth.

- After that I ran SFC /Scannow which reported "Windows Resource Protection found corrupt files and successfully repaired them.".

- I ran SFC /Scannow again but this time it reported "Windows Resource Protection found corrupt files but was unable to repair some of them.".

- I then ran Cleanmgr as advised by some search engine research, to rule out the possibility of the contents of WinSxS > Pending Deletes and WinSxS > Pending Renames causing the error.

- I reran SFC /scannow. It reported that it found corruption and repaired it.

- I reran SFC /Scannow again but it reported that it detected corrupt files but could not repair them.

- After some further search engine research I concluded, according to multiple forum responses, that this is a strong indicator of malware presence.

 

Malware I have detected so far:

- My antivirus detected a Trojan on my computer (Trojware.Win32.CoinMiner.IEGT@315256396) in an old .exe file I had in my downloads folder. It claimed successful quarantine and removal.

- The SFC /Scannow problem of alternating between claiming to have fixed all corruption and claiming not to have fixed all corruption still recurs.

 

I can supply further information as requested.


Edited by Thelps, 24 March 2016 - 10:43 PM.


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#2 nasdaq

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Posted 25 March 2016 - 07:53 AM

Hello, Welcome to BleepingComputer.
I'm nasdaq and will be helping you.

If you can please print this topic it will make it easier for you to follow the instructions and complete all of the necessary steps in the order listed.
===


Download Malwarebytes' Anti-Malware from Here

Double-click mbam-setup-2.X.X.XXXX.exe to install the application (X's are the current version number).
  • Make sure a checkmark is placed next to Launch Malwarebytes' Anti-Malware, then click Finish.
  • Once MBAM opens, when it says Your databases are out of date, click the Fix Now button.
  • Click the Settings tab at the top, and then in the left column, select Detections and Protections, and if not already checked place a checkmark in the selection box for Scan for rootkits.
  • Click the Scan tab at the top of the program window, select Threat Scan and click the Scan Now button.
  • If you receive a message that updates are available, click the Update Now button (the update will be downloaded, installed, and the scan will start).
  • The scan may take some time to finish,so please be patient.
  • If potential threats are detected, ensure that Quarantine is selected as the Action for all the listed items, and click the Apply Actions button.
  • While still on the Scan tab, click the link for View detailed log, and in the window that opens click the Export button, select Text file (*.txt), and save the log to your Desktop.
  • The log is automatically saved by MBAM and can also be viewed by clicking the History tab and then selecting Application Logs.
POST THE LOG FOR MY REVIEW.

Note:
If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts.
Click OK to either and let MBAM proceed with the disinfection process.
If asked to restart the computer, please do so immediately.

===

=======

Please download AdwCleaner by Xplode onto your Desktop.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Click the LogFile button and the report will open in Notepad.
IMPORTANT
  • If you click the Clean button all items listed in the report will be removed.
If you find some false positive items or programs that you wish to keep, Close the AdwCleaner windows.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Check off the element(s) you wish to keep.
  • Click on the Clean button follow the prompts.
  • A log file will automatically open after the scan has finished.
  • Please post the content of that log file with your next answer.
  • You can find the log file at C:\AdwCleanerCx.txt (x is a number).
===

Download the version of this tool for your operating system.
Farbar Recovery Scan Tool (64 bit)
Farbar Recovery Scan Tool (32 bit)
and save it to a folder on your computer's Desktop.
Double-click to run it. When the tool opens click Yes to disclaimer.
Press Scan button.
It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.

How to attach a file to your reply:
In the Reply section in the bottom of the topic Click the "more reply Options" button.
attachlogs.png

Attach the file.
Select the "Choose a File" navigate to the location of the File.
Click the file you wish to Attach.

Click the Add reply button.
===


Please post the logs.

Let me know what problems is persisting.

#3 Thelps

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Posted 25 March 2016 - 02:28 PM

Unfortunately, due to security concerns, I cannot provide log files from MBAM or any other software that keeps logs.

 

I'm more interested in acquiring the necessary skills to interpret the output of programs running on my own computer.

 

You'll need to take a more educational approach in how you go about assisting me with this issue.

 

Otherwise, please request that this forum thread is passed to someone who is willing to do so.

 

To corroborate this stance: I've been working at this for almost three years now (complete, 100% PC security - ability to acquire information without giving any away). The vast majority of my forum requests always result in a standard request for third-party malware scanning followed by the submission of log files. 

 

The interpretation of the log files are rarely fully explained, and the fixes seem closer to patches than actually dealing with the OP's problem.


Edited by Thelps, 25 March 2016 - 02:35 PM.


#4 nasdaq

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Posted 26 March 2016 - 07:55 AM

I'm only a helper on this forum.

I suggest you use the Contact Us link in the bottom of this post.

You can ask the Administrator what he can do for you.




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