Windows 10: My One Drive is infected with Ransomware

My laptop got infected with ransomware yesterday. Somehow the unknown files uploaded itself to my One Drive since I have it Signed In and Sync every time I use my laptop. When I wanted to view my One Drive storage in my browser, OneDrive detected some files in there are ransomwares. I have reformat my laptop, reinstall Windows. Luckily I never saved any important files in my OneDrive. But I really wanted to remove the ransomware infected files. Is there a way to re-format/clean up/remove all the files in my OneDrive? I'm afraid my laptop got infected again.

:)

 

I have been infected with Ransomware

Oh.

I see that a Community Moderator converted your thread from a Discussion to a Question.

Do you have a question?

It is not quite clear (to me at least) why you've created this thread....

In case that you do indeed have a problem with ransomware:

It would be helpful if you would describe your problem more precisely, see:
Suggestions for asking a question on help forums

Without knowing more details, suggestion to read/do:

Try to identify with what Ransomware you're dealing here:
https://id-ransomware.malwarehunterteam.com/index.php

and read/follow this guide:
How to remove ransomware the right way: A step-by-step guide

Also: See the pinned threads here:
https://www.bleepingcomputer.com/forums/f/239/ransomware-help-tech-support/

Might be the best to get free expert help in above mentioned bleepingcomputer forum....

=======================

Also suggestion to read:

• Ransomware Avoidance
  
• Best Practices for Safe Computing - Prevention of Malware Infection
  

 

Ransomware infection?

Any files that are encrypted with MRCR1 Ransomware will have the the
.MRCR1.PEGS1, .RARE1,
.RMCM1 or .MERRY extension appended to the end of the encrypted data filename and leave files (ransome notes) named YOUR_FILES_ARE_DEAD.HTA as explained

here. The ransom note instructs victims to contact the cyber-criminals at "L: *** Email address is removed for privacy ***" or "TELEGRAM @comodosecurity" to get payment instructions.

You can submit samples of encrypted files and ransom notes to ID Ransomware for
assistance with identification and confirmation. This is a service that helps identify what ransomware may have encrypted your files and then attempts to direct you to an appropriate support topic where you can seek further
assistance. Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections.

Fabian Wosar released a decryptor tool for victims of this type of infection.

• Emsisoft Decrypter for MRCR (Merry X-Mas) -
  
  How to use Emsisoft Decrypter for MRCR

There is an ongoing discussion in this topic where you can post comments, ask questions and seek further assistance. Other victims have been directed there to share information, experiences and suggestions.

• Merry X-Mas (.MRCR1) Ransomware Support & Help topic - YOUR_FILES_ARE_DEAD.HTA

Most crypto malware ransomware is typically programmed to automatically remove itself...the malicious files responsible for the infection...after the encrypting is done since they are no longer needed. That explains why many security scanners
do not find anything after the fact. The encrypted files do not contain malicious code so they are safe. Unfortunately, most victims do not realize they have been infected until the ransomware displays the ransom note and the files have already
been encrypted. In some cases there may be no ransom note and discovery only occurs at a later time when attempting to open an encrypted file. As such, they don't know how long the malware was on the system before being alerted or if
other malware was downloaded and installed along with the ransomware. If other malware was involved it could still be present so be sure to perform full scans with your anti-virus.
Disinfection will not help with decryption of any files affected by the ransomware.

If your antivirus did not detect and remove anything, additional scans should be performed with other security programs like

Malwarebytes 3.0,
HitmanPro and
Emsisoft Anti-Malware. You can also supplement your anti-virus or get a second opinion by performing an

Online Virus Scan...ESET is one of the more effective online scanners.

 

Ransomware attack

Glad to hear that you found a backup of your important files! Good!

Here are some further articles you might want to read:

• Best Defensive Strategy against ransomware (crypto malware)
• How to Protect and Harden a Computer against Ransomware
• https://www.bleepingcomputer.com/forums/t/691026/can-antivirus-software-remove-ransomware-from-my-infected-system/?p=4692721
  
• https://blog.emsisoft.com/en/26164/how-to-remove-ransomware-the-right-way-a-step-by-step-guide/
  
• First steps when dealing with ransomware
  
• How crypto ransomware spreads... is it decryptable...should I pay the ransom
• https://www.howtogeek.com/434676/should-you-pay-up-if-you-get-hit-by-ransomware/
  

Best wishes,

.