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TMP file identified as MachineLearning/Anomalous100%

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Malwarebytes discoved a "MachineLearning/Anomalous100%" during a scan on my Windows 10 laptop. The file is called "BIT66C0.TMP". 
I'm not sure if this is relevant but I was manually updating Firefox and Chrome during the scan. The Chrome update originally failed (I unfortunately didn't take note of the error message) but after restarting Chrome the update was completed without incident. The computer appears to be working fine and subsequent Malwarebytes scans haven't discovered anything. Perhaps Malwarebytes detected a temp file being created by Chrome during the update? The details of the relevant file are:

"File: 1
MachineLearning/Anomalous.100%, C:\USERS\USER\APPDATA\LOCAL\TEMP\BIT66C0.TMP, Quarantined, 0, 392687, 1.0.39783, , shuriken, , 6CC12897B0400D6CD61C85C123CDCDC6, 1F046DC1E819733811502A66BFF802A6DA76B63B879BBFC4B921E8E46DEC0493



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Hello Kramer1007 and welcome to Malwarebytes,

Lets grab some logs and see whats going on, continue with the following:

If you do not have Malwarebytes installed do the following:

Download Malwarebytes version 4 from the following link:


Double click on the installer and follow the prompts.

When the install completes or Malwarebytes is already installed do the following:

Open Malwarebytes, select > small cog wheel top right hand corner, that will open "settings" from there select "Security" tab.

Scroll down to "Scan Options" ensure Scan for Rootkits and Scan within Archives are both on....

Close out the settings window, this will take you back to "DashBoard" select the Blue "Scan Now" tab......

When the scan completes quarantine any found entries...

To get the log from Malwarebytes do the following:
  • Click on the Detection History tab > from main interface.
  • Then click on "History" that will open to a historical list
  • 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

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


Download AdwCleaner by Malwarebytes onto your Desktop.

Or from this Mirror
  • Right-click on AdwCleaner.exe and select http://i.imgur.com/Spcusrh.pngRun 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 Quarantine 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


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... If English is not your primary language Right click on FRST/FRST64 and rename FRSTEnglish/FRST64English

  • 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.

Let me see those logs in your reply...

Thank you,

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HI Kevin thank you for your prompt reply.

Some of the scans have details of some work software which I'm reticent to post on a public forum - is it possible to contact you directly?

Note that the latest malwarebytes scan and the adw scan didn't detect any malicious items.


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Hello Kramer1007,

I prefer that logs are attached to your replies in this thread if possible, also if this is a business system this forum is not really the place to seek help... This forum is here for personal systems.. If your PC is not a dedicated business system but used mainly for personal use you could zip up FRST logs and password protect them, PM me the password so only moderators and admin staff can see your logs...

Thanks Kevin...

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Hi Kevin

Thank you for reply.

The computer is a family laptop but I've needed to use it on occasion during COVID lockdown. Logs are attached, please note that out of ignorance I ran ccleaner after the .TMP was originally identified (before I had discovered this forum).

Requested logs of Adw and malwarebytes are attached. I have included the malwarebytes log when the anomalous file was detected and a recent clear one.

Thanks again.

AdwCleaner[S00].txt malware_scan_result_infection_25042021.txt malwarebytes_scan_25042021_clear.txt FRST_Addition_2.zip

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  • Solution

Hiya Kramer1007,

Thanks for those logs, as you thought your system is clean, no signs of Malware or Infection. The temp file flagged will more than likely have been a remnant from an update of your browsers...

Right click on FRST here: C:\Users\USER\Downloads\FRST.exe and rename uninstall.exe when complete right click on uninstall.exe and select "Run as Administrator"

If you do not see the .exe appended that is because file extensions are hidden, in that case just rename FRST to uninstall

That action will remove FRST and all created files and folders...


Condsider the following:

Malwarebytes Browser Guard (Free) for Firefox: https://addons.mozilla.org/en-GB/firefox/addon/malwarebytes/

Malwarebytes Browser Guard (Free) for Chrome: https://chrome.google.com/webstore/detail/malwarebytes-browser-guar/ihcjicgdanjaechkgeegckofjjedodee Link will also work for Opera and Edge..

PatchMyPC, keep all your software upto date - https://patchmypc.com/home-updater#download

From there you should be good to go...


Read the following links to fully understand PC Security and Best Practices, you may find them useful....

Answers to Common Security Questions and best Practices

Do I need a Registry Cleaner?

Take care and surf safe

Kevin... user posted image
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Glad we could help.

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 thread. Other members who need assistance please start your own topic in a new thread.

Please review the following for Tips to help protect from infection

Thank you



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