How did I get infected? (MachineLearning/Anomalous 100%)

[Aya_Tachibana]

Hello Everyone.
I scan with MBAM free everyday, just to check if everything is allright.
Today, I scanned my computer and it found something.

Also, it found a user (defaultuser1) that was created aprox. 2 hours ago, which is strange.

I will post the attachments needed, and I will also scan my files for anything suspicious.

Just some information that may be useful:

- The time of when the user was created was about the time when I logged into my computer, but clicked in the wrong button "I don't remember my PIN" when I was in the lock screen.

- Strangely, after restoring the file to scan with Virus Total, MBAM now doesn't find it malicious anymore. I wonder why?

- Apparently, it only detects if the system is connected to the internet

- Virus Total Link: https://www.virustotal.com/#/file/a6c4dcfa62059f2a2058ac6676cb0dd423ec087d03f0ec39ff67819e3d5cc44f/detection

- I scanned my computer with MBAM full scan, Windows Defender full scan and ESET Online Scanner. No malware was detected.

 

PC information:

-  CPU: Intel Atom Z3775 - 1.46GHz

- RAM: 2GB

- OS: WIndows 10 Home 1709 (16299.402) 32 bits

- Security software: MBAM, Windows Defender and ESET Online Scanner (for on-demand scanning)

 

 

MBAM.txt

Addition.txt

FRST.txt

Edited April 28, 2018 by Aya_Tachibana
Better title, add tags and more information

[Malwarebytes]

***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:

Spoiler

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.
   
3. Select Threat Scan. Threat Scan is the most thorough and recommended scan method available.
   
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:

Spoiler

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.
   
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.

Note: If you are unable to attach files, please copy and past the contents of the requested files in your Reply instead. 

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[AdvancedSetup]

Hello @Aya_Tachibana

Please run the logs again as an Administrator.

Ran by rafa_ (ATTENTION: The user is not administrator) on DESKTOP-UOP3QI5 (27-04-2018 02:57:28)

 

 

Please run the following steps and post back the logs as an attachment when ready.

STEP 01

• If you're already running Malwarebytes 3 then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
• If you don't have Malwarebytes 3 installed yet please download it from here and install it.
• Once installed then open Malwarebytes and check for updates. Then click on the Scan tab and select Threat Scan and click on Start Scan button.
• Once the scan is completed click on the Export Summary button and save the file as a Text file to your desktop or other location you can find, and attach that log on your next reply.
• If Malwarebytes won't run then please skip to the next step and let me know on your next reply.

STEP 02

Please download AdwCleaner by Malwarebytes and save the file to your Desktop.

• Right-click on the program and select Run as Administrator to start the tool.
• Accept the Terms of use.
• Wait until the database is updated.
• Click Scan.
• When finished, please click Clean.
• Your PC should reboot now if any items were found.
• After reboot, a log file will be opened. Copy its content into your next reply.

 

RESTART THE COMPUTER Before running Step 3

STEP 03
Please download the Farbar Recovery Scan Tool 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

• Double-click to run it. When the tool opens, click Yes to disclaimer.
• Press the Scan button.
• It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
• The first time the tool is run, it also makes another log (Addition.txt). If you've, run the tool before you need to place a check mark here.
• Please attach the Additions.txt log to your reply as well.

 

Thanks

Ron

 

[Aya_Tachibana]

Here is the logs. All programs were run as an administrator.

What should I do next?

EDIT: I ran FRST before the scans, I uploaded the new ones now.

 

MBAM.txt

 

 

AdwCleaner[C00].txt

AdwCleaner[S00].txt

Addition.txt

FRST.txt

Edited April 30, 2018 by Aya_Tachibana

[AdvancedSetup]

The logs look good.

The account Defaultuser0 is normal and created by Microsoft during the Windows 10 Anniversary update. My guess is that something caused an issue either creating, naming, or re-naming the account and was then renamed to Defaultuser1 instead. 

Unless something else is going on I think you're good to go.

Ron

 

[Aya_Tachibana]

9 minutes ago, AdvancedSetup said:

The logs look good.

The account Defaultuser0 is normal and created by Microsoft during the Windows 10 Anniversary update. My guess is that something caused an issue either creating, naming, or re-naming the account and was then renamed to Defaultuser1 instead. 

Unless something else is going on I think you're good to go.

Ron

 

Thank you for the reply.

But I will tell you that I installed Windows 10 here few weeks ago, so I installed the Fall Creators Update version.

So, the device didn't received a big update like the Anniversary one. Is the device still fine?

 

Thank you.

Aya

[AdvancedSetup]

You can look through the Event Logs and possibly locate when it was created and by what process, but again. I'm not aware of any infections that would create such an account. It isn't needed to infect or control your system.

The logs are not showing any obvious threats.

 

[Aya_Tachibana]

1 minute ago, AdvancedSetup said:

You can look through the Event Logs and possibly locate when it was created and by what process, but again. I'm not aware of any infections that would create such an account. It isn't needed to infect or control your system.

The logs are not showing any obvious threats.

 

Well, since the system is performing normally, then I suppose it's safe. I will take a look later into the Event logs to check if everything is all right.

 

Thank you for the help.

Aya.

[AdvancedSetup]

You're quite welcome.

Take care and have a great week

Ron

 

[AdvancedSetup]

Glad we could help.

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Thanks