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Trojan Yelloader Removal Issues


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Hello, I've recently been noticing random spikes in cpu/drive usage that causes games, and various other programs to crash. Ran a scan and found this bugger in my appdata/local path, and the folder cannot be deleted, nor can malwarebytes remove the trojan. Any help on the subject, I have a log from the attempted quarantine.  

 

Trojan Yelloader Failed Removal.txt

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Hello voidboi and welcome to Malwarebytes,

Continue with the following:

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.


Thanks,

Kevin
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Hello voidboi and welcome to Malwarebytes,

Your logs indicate smartservie infection, to remove that infection you will need access to a spare PC and a USB Flashdrive 4gb or above.

Do this first on the infected PC:

Select the Windows key and X key together, from the xmenu select Command Prompt (Admin)

At the prompt either type or copy/paste the following commands, select enter after each command:

bcdedit.exe /set {bootmgr} displaybootmenu yes
bcdedit.exe /set {default} recoveryenabled yes
exit


Next,

Boot up your spare PC plug in the flash drive, navigate to that drive, right click on it direct and select format. Quick option is adequate...

Next,

On that same PC downoad and save FRST to same Flash drive, make sure to get the correct version, if you are unsure d/l and save both, only the correct one will run. Do not plug Flash Drive into sick PC until booted to Recovery Environment.

http://www.bleepingcomputer.com/download/farbar-recovery-scan-tool/

Next,

Boot sick PC to Recovery Environment, if you are unsure of that action have a read at the following link, maybe bookmark for future reference...

https://www.tenforums.com/tutorials/2294-boot-advanced-startup-options-windows-10-a.html

Next,

From the Windows 10 Tutorial you should get access to the Advanced Startup Options at boot for Windows 10

user posted image


From that window select "Troubleshoot"


user posted image


From the next window select "Advance Options"


user posted image


From that Window select "Command Prompt"

Ensure to plug the flash drive into a USB port... You should now be in Recovery Environment with the Command Prompt Window open......

Continue with the following:
 
  • Select Command Prompt
  • In the command window type in notepad and press Enter.
  • The notepad opens. Under File menu select Open.
  • Select "Computer" or "My PC" and find your flash drive letter and close the notepad.
  • In the command window type E:\frst64 or E:\frst depending on your version. Press Enter Note: Replace letter E with the drive letter of your flash drive.
  • The tool will start to run.
  • When the tool opens click Yes to disclaimer.
  • Press Scan button.
  • It will make a log (FRST.txt) on the flash drive. Please copy and paste it to your reply.


Leave the infected PC in Recovery mode, post the produced log from your flash drive via the spare PC....

Thank you,

Kevin..
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Thanks for that log and update voidboi, continiue:

Boot sick PC back to Normal mode.

Next,

Download attached fixlist.txt file (end of reply) and save it to the Desktop, or the folder you saved FRST into. "Do not open that file when running FRST fix"
NOTE. It's important that both FRST and fixlist.txt are in the same location or the fix will not work.

Open FRST and press the Fix button just once and wait.
The tool will make a log on the Desktop (Fixlog.txt) or the folder it was ran from. Please post it to your reply.

Next,

Open Malwarebytes Anti-Malware.
 
  • On the Settings tab > Protection Scroll to and make sure the following are selected:
    Scan for Rootkits
    Scan within Archives
     
  • Scroll further to Potential Threat Protection make sure the following are set as follows:
    Potentially Unwanted Programs (PUP`s) set as :- Always detect PUP`s (recommended)
    Potentially Unwanted Modifications (PUM`s) set as :- Alwaysdetect PUM`s (recommended)
     
  • Click on the Scan make sure Threat Scan is selected,
  • A Threat Scan will begin.
  • When the scan is complete if anything is found make sure that the first checkbox at the top is checked (that will automatically check all detected items), then click on the Quarantine Selected Tab
  • If asked to restart your computer to complete the removal, please do so
  • When complete click on Export Summary after deletion (bottom-left corner) and select Copy to Clipboard.
  • Wait for the prompt to restart the computer to appear, then click on Yes.
  • After the restart once you are back at your desktop, open MBAM once more to retrieve the log.


To get the log from Malwarebytes do the following:
 
  • Click on the Reports tab > from main interface.
  • 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

     
  • Use "Copy to Clipboard, then Right click to your reply > select "Paste" that will copy the log to your reply…


Next,

Download AdwCleaner by Malwarebytes onto your Desktop.

Or from this Mirror
 
  • Right-click on AdwCleaner.exe and select user posted imageRun 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 Clean 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 Microsoft's " Malicious Software Removal Tool" and save direct to the desktop

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

https://www.microsoft.com/en-gb/download/malicious-software-removal-tool-details.aspx


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\mrt.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, also tell me if there are any remaining issues or concerns...

Thank you,

Kevin...

 

 

fixlist.txt

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Hello, just finished the above tasks. Here are the logs...
It seems most everything has cleared out.

I am also experiencing a problem on startup, but it's probably unrelated to virus/malware issues. Every time during startup while the circles spin, they change to a text that roughly says scanning and repairing drive, with a long code that follows. I can probably retrieve it if you'd at all like to assist me with that/have some knowledge on the error.

Otherwise that was the issue at hand!

mrt scan.txt

MWBYTS Scan Post FRST fix.txt

MWBYTS Scan Post Restart Summary.txt

Scan Report.txt

AdwCleaner Scan.txt

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