Remove OhNo Ransomware - Restore .OhNo! Files

Remove OhNo Ransomware – Restore .OhNo! Files

This article will help you to remove OhNo ransomware completely. Follow the ransomware removal instructions given at the bottom of the article.

OhNo is a ransomware virus that encrypts your files, while also appends the .OhNo! extension to them. The OhNo virus displays a ransom note message. The files are filled with instructions about paying a ransom of 2 Monero coins for supposedly recovering your data. Continue to read below to see how you could try to potentially restore some of your files.

Threat Summary

TypeRansomware, Cryptovirus
Short DescriptionThe ransomware encrypts files on your computer and displays a ransom message afterward.
SymptomsThe ransomware will encrypt your files and put up a ransom note in a window.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by OhNo!


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss OhNo!.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

OhNo Ransomware – Infection

OhNo ransomware could spread its infection with various methods. A payload dropper which initiates the malicious script for this ransomware is being spread around the World Wide Web, and researchers have gotten their hands on a malware sample. If that file lands on your computer system and you somehow execute it – your computer system will become infected. You can see the detections of such a file on the VirusTotal service right here:

OhNo ransomware might also distribute its payload file on social media and file-sharing services. Freeware which is found on the Web can be presented as helpful also be hiding the malicious script for the cryptovirus. Refrain from opening files right after you have downloaded them. You should first scan them with a security tool, while also checking their size and signatures for anything that seems out of the ordinary. You should read the tips for preventing ransomware found in our forums.

OhNo Ransomware – In-Depth Analysis

OhNo is a virus that encrypts your files and extorts you to pay a ransom to supposedly recover them. Not all common file types are encrypted, but most of the important ones are.

OhNo ransomware might make entries in the Windows Registry to achieve persistence, and could launch or repress processes in a Windows environment. Such entries are typically designed in a way to launch the virus automatically with each start of the Windows Operating System.

The note can be previewed right down here, from the following screenshot:

The note reads the following:

You have been, infected with OhNo! ALL your Documents, Downloads, and Desktop have been Encrypted with a Unique Key to your System. Each Key is a TOTALLY Random Key specific to that Machine. Please Pay 2. XMR to the specified address below and you will receive a Email with your Key. Monero (XMR) is a cryptocurrency based on 100% annoymous transactions. You can find how to purchase Monero by using Google. If you can’t figure out how to Buy XMR, you probably shouldn’t have a PC.
– Goodluck
XMR ADDRESS: 44edA37JgbcWGxKMBCj94JZu7LQ95rASfRaUe8KMida5ZiQwHxsBv2EjXqrT3anyZ22j7DEE74GkbVcQFyH2nNiC3df9K3y

Except for that note, your Desktop background will be changed to the following image:

The note of the OhNo ransomware states that your files are encrypted. You are demanded to pay up the ransom sum of 2 XMR (Monero) coins. It is believed that this cryptocurrency is more secure than Bitcoin and completely untraceable, if there were doubts about Bitcoin. The ransom equals to around 280 US dollars at the time of writing this article.

OhNo Ransomware – Encryption

The first variant detected for the OhNo ransomware did not encrypt files. However, in the next one that was discovered, it was seen to encrypt some files. The encryption process launches PowerShell modules which use .NET AES encryption algorithm. File folders which get encrypted are Desktop, downloads, and also directories containing documents. It will encrypt your files while placing the .OhNo! extension to all locked files.

The targeted extensions of files which are sought to get encrypted are the following ones:

→.7z, .bmp, .csv, .dll, .doc, .docx, .exe, .gif, .gz, .jpeg, .jpg, .lnk, .midi, .mp3, .pdf, .png, .ppt, .pptx, .txt, .wav, .wpd, .xlsm, .xlsx, .zip

The OhNo cryptovirus could be set to erase all the Shadow Volume Copies from the Windows operating system with the help of the following command:

→vssadmin.exe delete shadows /all /Quiet

Currently, the command is not set, but the ransomware continues to develop. If the above-stated command is executed, that could make the encryption process more efficient. That is due to the fact that the command eliminates one of the prominent ways to restore your data. If your computer device was infected with this ransomware and your files are locked, read on through to find out how you could potentially recover your files.

Remove OhNo Ransomware and Restore .OhNo! Files

If your computer got infected with the OhNo ransomware virus, you should have a bit of experience in removing malware. You should get rid of this ransomware as quickly as possible before it can have the chance to spread further and infect other computers. You should remove the ransomware and follow the step-by-step instructions guide provided below.


Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

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