Strange system file on C:\

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  1. Posts : 15
    Windows 7 Ultimate x64
       #1

    Strange system file on C:\


    Hi!

    When I checked the "Show system files" box a file I've never seen before appeared in my C:\ directory and no other computer I checked has it.

    File name: DCPJQ
    File size: 450 KB (461.625 bytes)
    SHA256: ae549d170c8c7bfd786368bfaefaac517f1dc5a3fd6f3faa639d65b6bcff8e5c
    More info on virustotal link: https://www.virustotal.com/en-gb/fil...8e5c/analysis/

    Can somebody please explain this file's purpose? Is it really a system file?

    Best Regards
    Migelo
      My Computer


  2. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #2

    It's a file so not a folder? It's located in root folder of C?
      My Computer


  3. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #3

    Please post the file as attachment
      My Computer


  4. Posts : 15
    Windows 7 Ultimate x64
    Thread Starter
       #4

    It's a file.

    I had to append .docx so it would let me upload it. Originally it comes without an extention.
    Strange system file on C: Attached Files
      My Computer


  5. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #5

    I renamed it to DCPJQ.txt and analysed it.

    Strings inside file:

    MandrakeSoft and GRUB and many more.

    Did you have linux? Still using linux?

    It seems to be part of grub bootloader.
    Or maybe it is a temp file created by grub loader.
      My Computer


  6. Posts : 15
    Windows 7 Ultimate x64
    Thread Starter
       #6

    Interesting idea how to analyze a binary file xD

    No, I've never had any linux on this machine but I've booted a live USB with gparted, ubuntu...etc. many times, so that might be it.
      My Computer


  7. Posts : 10,796
    Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
       #7

    Migelo said:
    Interesting idea how to analyze a binary file xD

    No, I've never had any linux on this machine but I've booted a live USB with gparted, ubuntu...etc. many times, so that might be it.
    Just rename the file and reboot.

    You can rename back using win7 recovery environment if it doesn't boot.
    If all is fine.... delete the file
      My Computer


  8. Posts : 15
    Windows 7 Ultimate x64
    Thread Starter
       #8

    I'll try that and report back once I get home from school.
      My Computer

  9.    #9

    I would also run a full scan with Malwarebytes and SUPERAntiSpyware and replace that unknown AV with Microsoft Security Essentials.

    Turn off SAS at boot in Preferences, and uncheck all of its updater boxes. Update manually before you run it.
      My Computer


  10. Posts : 15
    Windows 7 Ultimate x64
    Thread Starter
       #10

    I already have MSE installed and it says it's ok.

    I'll do that scans as per your suggestion.
      My Computer


 
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