How to Remove .Ciop Files Virus

How to Remove .Ciop Files Virus

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In this article, you will find more information about .CIop files virus as well as a step-by-step guide on how to remove malicious files from an infected system and how to potentially recover files encrypted by this ransomware.

The so-called .Ciop files virus is a nasty ransomware infection that interferes with computer system settings in order to reach target types of files and encode them. It appends an extension of the same name .Ciop to the names of all corrupted files. Afterward, it drops a ransom note that extorts ransom fee for files decryption.

Threat Summary

Name.Ciop Files Virus
TypeRansomware, Cryptovirus
Short DescriptionEncrypts valuable files stored on the infected computer. Claims that your network is infected. Attempts to extort a ransom payment.
SymptomsImportant files are locked and renamed with .Ciop extension. A ransom message extorts payment for data recovery tool.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by .Ciop Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .Ciop Files Virus.
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.

.Ciop Files Virus – Distribution

In general, for the spread of threats like .Ciop files virus, cyber criminals use spam email messages. This method enables them to trick as many users as possible to run the ransomware payload on their devices. Emails that aim to deliver malware on computer devices often pose as representatives of legitimate websites, services, and even governmental institutions.

They also contain a few traits that could help users detect the presence of malicious code. The most common one is a file attachment. It could be a popular file format such as a document, archive, image, PDF or another well-known file format. Once such a file is loaded on a target device, it triggers the malicious code that leads to infection with .Ciop ransomware.

Another malicious element that may appear in emails part of ransomware spread campaigns is URL address being it in the form of an in-text link, button, coupon, banner, image or other clickable forms. The load of the page behind this URL address results in the unnoticed execution of ransomware payload.

.Ciop Files Virus – Overview

The so-called .Ciop files virus is a nasty crypto infection that has been identified as a strain of

CryptoMix ransomware. When started on a computer system, this threat triggers a long sequence of malicious operations that cause heavy system modifications and lead to corruption of sensitive user files.

To complete all attack stages, .Ciop files virus first needs to establish a bunch of malicious files in some of the following system folders:

  • %AppData%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Temp%

As reported by security researchers, by starting these files in a predefined order, the ransomware stops numerous Windows services and processes so it can bypass active security measures and close all target files that are currently opened.

At the end of the attack the ransomware drops a file called CIopReadMe.txt on the Desktop. According to the message presented by this file, this CryptoMix iteration is designed to corrupt the whole network rather than a single computer. So it is of paramount importance to disconnect the infected device from the network as soon as you notice the attack. Otherwise, the nasty .Ciop ransomware could manage to infect all devices connected to this network.

Here is the entire ransom message displayed by .Ciop files virus:

Your network has been penetrated.
All files on each host in the network have been encrypted with a strong algorithm.
Backups were either encrypted or deleted or backup disks were formatted.
Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
We exclusively have decryption software for your situation
No decryption software is available in the public.
DO NOT RESET OR SHUTDOWN – files may be damaged.
DO NOT RENAME OR MOVE the encrypted and readme files.
DO NOT DELETE readme files.
This may lead to the impossibility of recovery of the certain files.
Photorec, RannohDecryptor etc. repair tools are useless and can destroy your files irreversibly.
If you want to restore your files write to emails (contacts are at the bottom of the sheet) and attach 2-3 encrypted files
(Less than 5 Mb each, non-archived and your files should not contain valuable information
(Databases, backups, large excel sheets, etc.)).
You will receive decrypted samples and our conditions how to get the decoder.

Your warranty – decrypted samples.
Do not rename encrypted files.
Do not try to decrypt your data using third party software.
We don`t need your files and your information.

But after 2 weeks all your files and keys will be deleted automatically.
Contact emails:

The final price depends on how fast you write to us.


Apparently, hackers expect you to contact them so they can send you back instructions on ransom payment and decryption process. For the sake of your security, it is better to avoid contacting them. They could attempt to trick you once again and skip sending you an effective decryptor.

.Ciop Files Virus – Encryption Process

To perform the encryption stage, .CIop files virus activates a module that contains the sophisticated RSA cipher algorithm. With the help of this algorithm, the ransomware transforms target files’ original code and leaves them out of order. Unfortunately, infection with this CryptoMix strain is likely to lead to the corruption of common files that store valuable information:

  • Audio files
  • Video files
  • Document files
  • Image files
  • Backup files
  • Banking credentials, etc

Following encryption, corrupted files appear with changed names. They are set to display the extension .Ciop at the end of their original names. The appearance of this specific extension in a file’s name is a sure sign that you cannot access the information it stores.
The process of restricting access to valuable files is supplemented by the execution of the following command:

→vssadmin.exe delete shadows /all /Quiet

When executed this command removes all shadow volume copies (copies of your files created by the operating system). This happens after the ransomware loads a batch file named clearnetworkdns_11-22-33.bat on the system. The occurrence of this event also leads to the deactivation of Windows’ automatic startup repair.

Remove .Ciop Files Virus and Attempt to Restore

The so-called .Ciop files virus is a threat with highly complex code designed to corrupt both system settings and valuable data. So the only way to use your infected system in a secure manner again is to remove all malicious files and objects created by the ransomware. For the purpose, you could use our removal guide that reveals how to clean and secure your system step by step. In addition, in the guide, you will find several alternative data recovery approaches that may be helpful in attempting to restore files encrypted by CryptoMix .Ciop ransomware. We remind you to back up all encrypted files to an external drive before the recovery process.

Gergana Ivanova

Gergana Ivanova

Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for three years, researching malware and reporting on the latest infections.

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