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Strange file deleted from external hard drive - possibly a virus from computer


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Hello everyone, 


the other day i opened my hard drive and found autorun.inf and another file, which i cannot remember what it was but i deleted them both because i knew autorun.inf was a virus - so i found multiple viruses on my own computer hard drive, found them by commnad prompt and deleted them in safe mode. 


But i remember that the other file's icon being blue, and it had name of seagate or something similar - something with a s maybe? My external drive is a seagate external hard drive, so i guess i thought it belonged to that (this is what i think right now - it could a misinception because i cannot remember well). I think it has a high chance of being a virus so i decided to ask here.


I think it could be on my computer and then get copied on to the external hard drive or it could be the company's file like that is suppose to be with the hard drive - or that's what i thought at the time anyways but i wasn't thinking properly at the time and just deleted without even thinking. 


The external hard drive is 2TB from Seagate and is Backup Plus Desktop drive with USB 3.0. The operating system is windows 10, and i have run the scan with Avast and Malwarebytes and have not found any viruses. Well those did not find the autorun.inf anyways. 

The computer is 64 bit. 


Please help! Maybe we can see if there is virus by doing different scans and using logs etc. 

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Hello and welcome to Malwarebytes,

Please be aware the following P2P/Piracy Warning is a standard opening reply made here at Malwarebytes, we make no accusations but do make you aware of Forum Protocol....


If you're using Peer 2 Peer software such as uTorrent, BitTorrent or similar you must either fully uninstall them or completely disable them from running while being assisted here.Failure to remove or disable such software will result in your topic being closed and no further assistance being provided.If you have illegal/cracked software, cracks, keygens etc. on the system, please remove or uninstall them now and read the policy on Piracy.

Autorun.inf is not necessarily malicious, but its use can be, Read here: https://en.wikipedia.org/wiki/Autorun.inf




Please open Malwarebytes Anti-Malware.

  • On the Settings tab > Detection and Protection sub tab, Detection Options, tick the box "Scan for rootkits".
  • Under Non-Malware Protection sub tab Change PUP and PUM entries to Treat detections as Malware
  • Click on the Scan tab, then click on Scan Now >> . If an update is available, click the Update Now button.
  • A Threat Scan will begin.
  • When the scan is complete, click Apply Actions.
  • Wait for the prompt to restart the computer to appear (if applicable), then click on Yes.
  • After the restart once you are back at your desktop, open MBAM once more.

To get the log from Malwarebytes do the following:

  • Click on the History tab > Application Logs.
  • Double click on the scan log which shows the Date and time of the scan just performed.
  • Click Export > From export you have three 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
      XML file (*.xml)      - 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 Farbar Recovery Scan Tool and save it to your desktop.

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...

  • 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"
  • 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 those logs to your reply.



Post those logs in your reply....


One tool i`d highly recommend that you d/l, install and use is McShield, That is a free to use program that will protect your system and any USB devices such as external Hard Drives.... It will not clash with your system security. Go here for that tool.. http://www.mcshield.net/ Please also open the "Features" tab at that link to find McShield`s uses...


Thank you,



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Hello Kevin,


Thanks for offering help again.


I have attached the logs to this post. I have realised today for this computer i have not removed AVG properly, so i have done that, then re scanned my computer and found some PUPs, and i have already deleted those files/programs, and through the malwarebytes.


I will look into the anti-virus program you offered. Do you know if it carries any PUPs during the download which could infect my computer?


The malwarebytes log:


Malwarebytes Anti-Malware
Update, 28/12/2015 5:40 p.m., SYSTEM, (username), Manual, Rootkit Database, 2015.12.18.1, 2015.12.26.1, 
Update, 28/12/2015 5:40 p.m., SYSTEM, (username), Manual, Domain Database, 2015.12.25.1, 2015.12.26.1, 
Update, 28/12/2015 5:40 p.m., SYSTEM, (username), Manual, Malware Database, 2015.12.25.5, 2015.12.28.1, 
Scan, 28/12/2015 6:43 p.m., SYSTEM, (username), Manual, Start:28/12/2015 5:40 p.m., Duration:1 hr 2 min 6 sec, Threat Scan, Completed, 0 Malware Detections, 2 Non-Malware Detections, 



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Thanks for those logs, McShield Is an extra layer protection and will not have any impact on your resident AV program Avast, the program download does not come with any unwanted extras, install it with confidence.


Another Security Program to install is UnChecky That will not have any impact on your resident security, it will run quietly in the background to stop any unwanted extras from programs/applications you try to install. Another clean program you can install with confidence..


Back to the logs....


I notice you have a couple of programs installed related to Tweakbit, "Driver Updater" and PC Cleanup" I recommend that you remove those at your earliest convenience......




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

Run 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.




Download AdwCleaner by Xplode onto your Desktop.

  • Double click on Adwcleaner.exe to run the tool.
  • Click on the Scan in the Actions box
  • Please wait fot the scan to finish..
  • When "Waiting for action.Please uncheck elements you want to keep" shows in top line..
  • Click on the Cleaning box.
  • Next click OK on the "Closing Programs" pop up box.
  • Click OK on the Information box & again OK to allow the necessary reboot
  • After restart the AdwCleaner(C*)-Notepad log will appear, please copy/paste it in your next reply. Where * is the number relative to list of scans completed...

thisisujrt.gif Please download Junkware Removal Tool to your desktop.

  • Shut down your protection software now to avoid potential conflicts. (re-enable when done)
  • Run the tool by double-clicking it. If you are using Windows Vista, 7, or 8; instead of double-clicking, right-mouse click JRT.exe and select "Run as Administrator".
  • The tool will open and start scanning your system.
  • Please be patient as this can take a while to complete depending on your system's specifications.
  • On completion, a log (JRT.txt) is saved to your desktop and will automatically open.
  • Post the contents of JRT.txt into your next message.




ESETOnline.png Scan with ESET Online Scanner

This step can only be done using Internet Explorer, Google Chrome or Mozilla Firefox.
Temporary disable your AntiVirus and AntiSpyware protection - instructions here.
Please visit ESET Online Scanner website.

Click there Run ESET Online Scanner.

If using Internet Explorer:

  • Accept the Terms of Use and click Start.
  • Allow the running of add-on.

If using Mozilla Firefox or Google Chrome:
  • Download esetsmartinstaller_enu.exe that you'll be given link to.
  • Double click esetsmartinstaller_enu.exe.
  • Allow the Terms of Use and click Start.

To perform the scan:

  • Make sure that Remove found threats is unchecked.
  • Scan archives is checked.
  • In Advanced Settings: Scan for potentially unwanted applications, Scan for potentially unsafe applications and Enable Anti-Stealth technology are checked.
  • Under “Enable Stealth Technology select “Change” select any extra drives in that window.
  • Click Start
  • The program will begin to download it's virus database. The speed may vary depending on your Internet connection.
  • When completed, the program will begin to scan. This may take several hours. Please, be patient.
  • Do not do anything on your machine as it may interrupt the scan.
  • When the scan is done, click Finish.
  • A logfile will be created at C:\Program Files (x86)\ESET\ESET Online Scanner. Open it using Notepad.

Please include this logfile in your next reply.

Don't forget to re-enable protection software!

Post those fresh logs, also let me know if any remaining issues or concerns....


Thank you,




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hello kevin


I have attached the logs on to this post


I wanted to tell you that i have deleted the programs and other files related to the programs which were detected before the scan, but i am still not sure why those PUPs popped up? Maybe they were still on my computer. Hopefully it was deleted by the time i have ran these scans etc. 


Thanks for your help again. 







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Hi Kevin,

I have donwloaded Mc shield and have connected the external hard drive. The program made sure that there was no malware which was deteced on it. However, when i opened it i found these two files called, "file.inf" and "file.txt"? Are they malware or virus?


I was just wondering, while i was scanning with the online scanner, my mouse accidently clicked chrome and opened a window. I immediately deleted it.. do you think it could have interfered and we should do another scan just in case?

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I would not expect those files to be malicious, you can delete them...




Download "Delfix by Xplode" and save it to your desktop.

Or use the following if first link is down:

"Delfix link mirror"

If your security program alerts to Delfix either, accept the alert or turn your security off.

Double Click to start the program. If you are using Vista or higher, please right-click and choose run as administrator

Make Sure the following items are checked:

  • Remove disinfection tools
  • Purge System Restore <--- this will remove all previous and possibly exploited restore points, a new point relative to system status at present will be created.
  • Reset system settings

Now click on "Run" and wait patiently until the tool has completed.

The tool will create a log when it has completed. We don't need you to post this.

Any remnant files/logs from tools we have used can be deleted…



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...  busy.gif

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An .inf file is an information file with details of device installation components, possibly a driver or similar, a .txt file is text giving details, orders or commands. In your case where they were found I did not believe to be malicious in any way, or useful in any way. That  is reason I said to delete rather than upload for analysis....


Any other issues or concerns...... :)

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  • Root Admin

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 thread 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. Thanks!

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