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Website repeatedly blocked because of Trojan + msbuild.exe


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Message is:

-Log Details-
Protection Event Date: 1/21/24
Protection Event Time: 11:08 PM
Log File: ea10ecca-b8db-11ee-8329-c87f5401e97c.json

-Software Information-
Version: 4.6.8.311
Components Version: 1.0.2242
Update Package Version: 1.0.79922
License: Premium

-System Information-
OS: Windows 11 (Build 22631.3007)
CPU: x64
File System: NTFS
User: System

-Blocked Website Details-
Malicious Website: 1
, C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe, Blocked, -1, -1, 0.0.0, , 

-Website Data-
Category: Malware
Domain: 
IP Address: 95.217.105.184
Port: 15647
Type: Outbound
File: C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe

 

Below I've attached the MB support tool logs. 

mbst-grab-results.zip

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  • Root Admin

Hello @asgkatz and :welcome:

 

 

Please run the following fix

 

NOTE: Please read all of the information below before running this fix.

  • NOTICE: This script was written specifically for this user, for use on this particular machine.
  • Running this on another machine may cause damage to your operating system that cannot be undone.

Once the fix has been completed, please attach the file FIXLOG.TXT to your next reply

Farbar program:   FRSTEnglish.exe

Save the attached file:  FIXLIST.TXT to this folder C:\Users\Andrew Katz\Downloads\

NOTE. It's important that both files, FRSTEnglish.exe, and fixlist.txt are in the same location or the fix will not work.

Please make sure you disable any real-time antivirus or security software before running this script. Once completed, make sure you re-enable it.

 

 

Run the Farbar program with Admin rights and press the Fix button just once and wait.

The fix may possibly take up to 60 minutes to complete

If the tool needs a restart please make sure you let the system restart normally and let the tool complete its run after restart.
The tool will make a log named Fixlog.txt in the same folder you ran the Farbar program from. Please attach that log on your next reply.

 

  1. NOTE:  This fix will run a scan to check that all Microsoft operating system files are valid and not corrupt and attempt to correct any invalid files. It will also run a disk check on the restart to ensure disk integrity.
  2. NOTE: As part of this fix all temporary files will be removed. If you have any open web pages that have not been bookmarked please make sure you bookmark them now as all open applications may be automatically closed.
                Also, make sure you know the passwords for all websites as cookies may possibly be removed in some cases, but not all cases.
  3. NOTE: As part of this fix, it will also reset the network to default settings including the firewall. If you have custom firewall rules you need to save please export or save them first before running this fix.

The following directories are emptied:

  • Windows Temp
  • Users Temp folders
  • Edge, IE, FF, Chrome, and Opera caches, HTML5 storages, Cookies and History
  • Recently opened files cache
  • Discord cache
  • Java cache
  • Steam HTML cache
  • Explorer thumbnail and icon cache
  • BITS transfer queue (qmgr*.dat files)
  • Recycle Bin

Important: items are permanently deleted. They are not moved to quarantine. If you have any questions or concerns please ask before running this fix.

The system will be rebooted after the fix has run.

fixlist.txt

Thanks

 

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  • Root Admin

Next, please run the following

 

 

Let's go ahead and run a couple of scans and get some updated logs from your system. Please read the entire post below before starting so that you're more familiar with the process

[ 1 ]

Please make the following system changes.

  • Temporarily disable your antivirus real-time protection or other security software first only if it blocks or interferes with the scans or downloads.. Make sure to turn it back on once the scans are completed.
  • Temporarily disable Microsoft SmartScreen to download software below only if needed. Make sure to turn it back on once the scans are completed.
  • Disable-Fast-Startup
  • Show-Hidden-Folders-Files-Extensions

[ 2 ]

I suggest a new scan for viruses & other malware. This may take several hours, depending on the number of files on the system and the speed of the computer.

The Microsoft Safety Scanner is a free Microsoft stand-alone virus scanner that can be used to scan for & remove malware or potentially unwanted software from a system. 

The download links & the how-to-run-the tool are at this link at Microsoft 

https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download

 

Look on the Scan Options & select the FULL scan.

Then start the scan. Have lots of patience. It may take several hours.

  • Once you see it has started, take a long long break;  walk away.  Do not pay credence if you see some intermediate early flash messages on the screen display.  The only things that count are the End result at the end of the run.
  • The scan will take several hours.  Leave it alone. It will remove any other remaining threats as it goes along.  Take a very long break, do your normal personal errands .....just do not use the computer during this scan.

This is likely to run for many hours as previously mentioned  ( depending on the number of files on your machine & the speed of the hardware.)

The log is named MSERT.log  and the log will be at C:\Windows\debug\msert.log

Please attach that log with your next reply.

 

It is normal for the Microsoft Safety Scanner to show detections during the scan process.

It is scanning for basically all bread crumbs or traces of files and registry entries that "might" be or have been part of some infection or previous infection.

That DOES NOT mean the computer is infected. Once the scan has been completed it uploads the log to their Cloud service which then uses Artificial Intelligence to determine if in fact any of the traces are an infection or not.

Then it writes into the log on your computer what it found.

 

Thank you

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  • Root Admin

Thank you for the zip file. Looks like it's not infected but it's location is suspect

Once the Safety Scan is complete, please post back that log.

Then also run the following

 

Scan with FSS Farbar Service Scanner
https://forums.malwarebytes.com/topic/306736-scan-with-fss-farbar-service-scanner/

 

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  • Root Admin

I'm not sure what this file is but the Microsoft Safety Scanner attempted to clean it but it really cannot do that.

I would recommend you delete the file unless it's really important to you.

D:\new\Your File Is Ready To Download.iso

 

The Farbar FSS scan looks good.

 

How is the computer running now? Is the blocking still happening?

 

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  • 2 weeks later...
  • Root Admin

Due to the lack of feedback, this topic is closed to prevent others from posting here.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this topic. Other members who need assistance please start your own topic in a new thread.

Tips to help protect from infection

Thanks

 

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