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Dilfidz

Powershell pop-up at windows startup that downloads a ps1 file via url

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Hi Malwarebytes support,

My windows 10 was affected by adware/malware and I have used malwarebytes to remove most of it. However, there' still one malware that can't be removed by malwarebytes. Whenever I startup my windows a powershell cmd appears for a brief second and disappears. I took a screenshot for your reference (refer to attached). It appears to be a powershell command that executes new-object net.webclient.downloadstring(URL). Malwarebyte then detects a malware found at the location c:\windows\winime.exe and quarantines it. Sometimes a myexe.exe malware is also found. Hence i remove it from the quarantine. But that did not fix the problem. Everytime i restart my laptop, the powershell launched again and malwarebytes detected the malware again and quarantine it. Process repeats at every startup.

It appears to be that the powershell command that was executed at startup causes this. I have no idea how to remove that powershell cmd or prevent the it from running the command. Please help. Would greatly appreciate your help on this. Malwarebyte did not detect the powershell problem.

Regards,

Dil

powershell_popup.png

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***This is an automated reply***

Hi,

Thanks for posting in the Malware Removal for Windows Help forum. Being infected is not fun and can be very frustrating to resolve, but don't worry because we have a team of experts here help you!!

Note: Please be patient. When the site is busy it can take up to 48 hours before a malware removal helper can assist you. If no one has replied to your new topic after 48 hours please contact a Moderator or Administrator to let them know.

 

First, if you haven't done so, please run a Threat Scan with the latest version of Malwarebytes. This may resolve your malware infection issue without the need for additional support. Click "Reveal Hidden Contents" below for details:

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Malwarebytes can detect and remove most malware with no further actions required for free.

If you do not have Malwarebytes, please download it here and install. Be sure to post back the log as shown below.

  1. Open Malwarebytes for Windows
  2. To the left, click Scan > Scan Types.
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  3. Select Threat Scan. Threat Scan is the most thorough and recommended scan method available.
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  4. Click Start Scan

Next, if you're still experiencing issues after running Malwarebytes, then technical logs will be required to assist you. Click "Reveal Hidden Contents" below and follow the instructions to run the Farbar Recovery Scan Tool:

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Don't use any temporary file cleaners unless requested - this can cause data loss and make a recovery difficult.

Please download the Farbar Recovery Scan Tool here and save it to your desktop. Note: You need to run the version compatible with your system. You can check here if you're not sure if your computer is 32-bit or 64-bit

  1. Double-click to run it. When the tool opens click Yes to the disclaimer.
  2. Press the Scan button.
    _frst_scan.jpg.d10e66dc03e35ede4fdcba12b
  3. It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
  4. The first time the tool is run, it also makes another log (Addition.txt). If you've run it before it may not and you may need to select it manually.

Finally, attach the Malwarebytes Threat Scan, FRST.txt and Additional.txt logs to your reply and Follow this topic to get notified when an expert has replied. Click "Reveal Hidden Contents" below for details.

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Troubleshooting Tips

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Hi Dilfidz :)

My name is Aura and I'll be assisting you with your malware issue. Since we'll be working together, you can call me Aura or Yoan, which is my real name, it's up to you! Now that we've broke the ice, I'll just ask you a few things during the time we'll be working together to clean your system and get it back to an operational state.

  • As you'll notice, the logs we are asking for here are quite lenghty, so it's normal for me to not reply exactly after you post them. This is because I need some time to analyse them and then act accordingly. However, I'll always reply within 24 hours, 48 hours at most if something unexpected happens
  • As long as I'm assisting you on Malwarebytes Forums, in this thread, I'll ask you to not seek assistance anywhere else for any issue related to the system we are working on. If you have an issue, question, etc. about your computer, please ask it in this thread and I'll assist you
  • The same principle applies to any modifications you make to your system, I would like you to ask me before you do any manipulations that aren't in the instructions I posted. This is to ensure that we are operating in sync and I know exactly what's happening on your system
  • If you aren't sure about an instruction I'm giving you, ask me about it. This is to ensure that the clean-up process goes without any issue. I'll answer you and even give you more precise instructions/explanations if you need. There's no shame in asking questions here, better be safe than sorry!
  • If you don't reply to your thread within 3 days, I'll bump this thread to let you know that I'm waiting for you. If you don't reply after 5 days, it'll be closed. If you return after that period, you can send me a PM to get it unlocked and we'll continue where we left off;
  • Since malware can work quickly, we want to get rid of them as fast as we can, before they make unknown changes to the system. This being said, I would appreciate if you could reply to this thread within 24 hours of me posting. This way, we'll have a good clean-up rhythm and the chances of complications will be reduced
  • I'm against any form of pirated, illegal and counterfeit software and material. So if you have any installed on your system, I'll ask you to uninstall them right now. You don't have to tell me if you indeed had some or not, I'll give you the benefit of the doubt. Plus, this would be against Malwarebytes Forums's rules
  • In the end, you are the one asking for assistance here. So if you wish to go a different way during the clean-up, like format and reinstall Windows, you are free to do so. I would appreciate you to let me know about it first, and if you need, I can also assist you in the process
  • I would appreciate if you were to stay with me until the end, which means, until I declare your system clean. Just because your system isn't behaving weirdly anymore, or is running better than before, it doesn't mean that the infection is completely gone
    This being said, I have a full time job so sometimes it'll take longer for me to reply to you. Don't worry, you'll be my first priority as soon as I get home and have time to look at your thread


This being said, it's time to clean-up some malware, so let's get started, shall we? :)

I'll be waiting for your logs.

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You'll have to reinstall Google Chrome, as one of its core file has been infected.

iO3R662.pngFarbar Recovery Scan Tool (FRST) - Fix mode
Follow the instructions below to execute a fix on your system using FRST, and provide the log in your next reply.

  • Download the attached fixlist.txt file, and save it on your Desktop (or wherever your FRST.exe/FRST64.exe executable is located)
  • Right-click on the FRST executable and select Spcusrh.pngRun as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users)
  • Click on the Fix button
    NYA5Cbr.png
  • On completion, a message will come up saying that the fix has been completed and it'll open a log in Notepad
  • Copy and paste its content in your next reply

fixlist.txt

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Hi Aura,

I have reinstalled Chrome and then run the fix.

Attached the Fixlog as requested.

Regards,

Dil

Fixlog.txt

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Good! Can you do me a favor? Can you .zip the C:\FRST\Quarantine folder and attach it here?

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Looks like it! Do you still get that command prompt pop-up on startup, or did it stop after running the FRST fix?

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I don't get the prompt on the startup as of now. However, in malwarebyte scans, winime.exe and myexe.exe is still found during startup. This happens again when i restart and seems like those files spawn at each startup.

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Oh? Can you provide me the Malwarebytes logs showing these detections?

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Hi Aura,

Thank you for the reply. I have attached the logs showing the malware detected and a screenshot of my quarantined items.

There are also other malware found in the quarantined.

Regards,

Dil

Log1.txt

Log2.txt

Log3.txt

Log4.txt

Q_items.png

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Thank you. Run a new scan with FRST and provide me a fresh set of logs. I'll look into it. Also, for now, you should consider all your passwords as being compromised. I suggest that you change them all from a clean computer, and enable MFA/2FA on every account that supports it.

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Posted (edited)

Alright in the meantime, do this as well.

iO3R662.pngFarbar Recovery Scan Tool (FRST) - Registry Search
Follow the instructions below to download and execute a Registry search on your system with FRST, and provide the log in your next reply.

  • Right-click on the executable and select Spcusrh.pngRun as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users)
  • Accept the disclaimer by clicking on Yes, and FRST will then do a back-up of your Registry which should take a few seconds
  • In the Search text area, copy and paste the following:
    winime
  • Once done, click on the Search Registry button and wait for FRST to finish the search
  • On completion, a log will open in Notepad. Copy and paste its content in your next reply


Edit: Also, can you upload this file to VirusTotal and post the report URL here?

C:\WINDOWS\system32\drivers\aroggfck.sys -> Access Denied <======= ATTENTION

 

Edited by Aura

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Here's the search reg log.

For the 2nd request, I am unable upload the file to VirusTotal as the permission is denied. That file is also hidden.

SearchReg.txt

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Alright. Do you have a USB Flash Drive?

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iO3R662.pngFarbar Recovery Scan Tool (FRST) - Recovery Environment Scan
Follow the instructions below to download and execute a scan on your system with FRST from the Recovery Environment, and provide the logs in your next reply.

Item(s) required:

  • USB Flash Drive (size depend on if you have to create a USB Recovery or Installation media)
  • CD/DVD (optional: only needed if you need to create a Recovery or Installation media and your USB Flash Drive is too small)
  • Another computer (optional: only needed if you cannot work from the infected computer directly)

Preparing the USB Flash Drive

  • Download the right version of FRST for your system:
    • FRST 32-bit
    • FRST 64-bit
      Note: Only the right version will run on your system, the other will throw an error message. So if you don't know what your system's version is, simply download both of them, and the one that works is the one you should be using.
  • Move the executable (FRST.exe or FRST64.exe) on your USB Flash Drive
  • Download the attached fixlist.txt, and move it on your USB Flash Drive as well

Boot in the Recovery Environment

  • Plug your USB Flash Drive in the infected computer
  • To enter the Recovery Environment with Windows Vista and Windows 7, follow the instructions below:
    • Restart the computer
    • Once you've seen your BIOS splashscreen (the computer manufacturer logo), tap the F8 key repeatedly until the Advanced Boot Options menu appears
    • Use the arrow keys to select Repair your computer, and press on Enter
    • Select your keyboard layout (US, French, etc.) and click on Next
    • Click on Command Prompt to open the command prompt
      Note:If you can't access the Recovery Environment using the F8 method above, you'll need to create a Windows installation or repair media. It can be made on the computer itself or another one running the same version of Windows as the one you plan to use it on. For more information, check out this tutorial on SevenForums.
  • To enter the Recovery Environment with Windows 8 or Windows 8.1, follow the instructions in this tutorial on EightForums
    Note:If you can't access the Recovery Environment using the method above, you'll need to create a Windows installation or repair media. It can be made on the computer itself or another one running the same version of Windows as the one you plan to use it on. For more information, check out this tutorial.
  • To enter the Recovery Environment with Windows 10, follow the instructions in this tutorial on TenForums
    Note:If you can't access the Recovery Environment using the method above, you'll need to create a Windows installation or repair media. It can be made on the computer itself or another one running the same version of Windows as the one you plan to use it on. For more information, check out this tutorial on TenForums.

Once in the command prompt

  • In the command prompt, type notepad and press on Enter
  • Notepad will open. Click on the File menu and select Open
  • Click on Computer/This PC, find the letter for your USB Flash Drive, then close the window and Notepad
  • In the command prompt, type e:\frst.exe (for the x64 version, type e:\frst64.exe and press on Enter
  • Note: Replace the letter e with the drive letter of your USB Flash Drive
  • FRST will open
  • Click on Yes to accept the disclaimer
  • Click on the Fix button and wait for the scan to complete
  • A log called fixlog.txt will be saved on your USB Flash Drive. Attach it in your next reply

fixlist.txt

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Because you're under a normal boot, you need to go in the Windows RE.

Boot Mode: Normal

 

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I entered the boot menu and clicked on CMD but it restarts my windows normally. I've followed the same steps but it doesnt work.

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Alright try this.

iO3R662.pngFarbar Recovery Scan Tool (FRST) - Fix mode
Follow the instructions below to execute a fix on your system using FRST, and provide the log in your next reply.

  • Right-click on the FRST executable and select Spcusrh.pngRun as Administrator (for Windows Vista, 7, 8, 8.1 and 10 users)
  • Copy/paste the following inside the text area:
    Start::
    CMD: bcdedit.exe /set {bootmgr} displaybootmenu yes
    CMD: bcdedit.exe /set {default} recoveryenabled yes
    End::
    
  • Click on the Fix button
    NYA5Cbr.png
  • On completion, a message will come up saying that the fix has been completed and it'll open a log in Notepad
  • Copy and paste its content in your next reply

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Now when you restart your computer you should have the option to boot in the Windows RE. Try it.

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