.tro Files Virus - How to Remove It (+ Decrypt Files)

.tro Files Virus – How to Remove It (+ Decrypt Files)

remove .tro files virus restore data sensorstechforum guide

This article explains the issues that occur in case of infection with .tro files virus and provides a complete guide on how to remove malicious files and how to potentially recover files encrypted by this ransomware.

An infection with the so-called .tro files virus leads to the corruption of important files. For their corruption, it utilizes sophisticated cipher algorithm. With the help of this algorithm, it transforms parts of the original code of target files and leaves them out of order. Soon after this ransomware encodes target files, it opens a ransom message to extort ransom payment for their recovery.

Threat Summary

Name.tro Files Virus
TypeRansomware, Cryptovirus
Short DescriptionA data locker ransomware that utilizes strong cihper algorithm to encrypt valuable files stored on the infected computer.
SymptomsImportant files are renamed with the .tro extension. Their data remains inaccessible. Hackers demand extort a ransom fee. u
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by .tro Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .tro 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.

.tro Files Virus – Update January 2019

There is a decrypter tool released for STOP ransomware’s .tro files virus variant. The tool was initially released for the .puma, .pumax, .pumas versions of the cryptovirus. Michael Gillespie has updated it to also support .djvu, .djvuq, .djvur, .djvut, .djvuu, .pdff, .tfude, .tfudeq, .tro, .udjvu, .tfudet. You can download the tool via the Decryption Tool link here. The tool requires a pair of an original file and its encrypted version.

.tro Files Virus – Distribution

Like many other crypto viruses, .tro is likely to be spread as a part of malicious email messages. This spread method is called malspam and in this paragraph, you will learn more about its typical components. Typical of these emails are:

  • An URL address presented in the form of an in-text link, button, image, banner or other form. Once loaded in the browser the web page associated with this link usually triggers an automatic download process of the malicious ransomware payload. After downloading the payload the same page usually activates specific scripts that execute it directly on your PC.
  • An attachment that contains the malware in it. Usually, according to the text message this file should be reviewed as soon as possible due to the importance of its information. The moment you open it on your device is the moment when you trigger the infection process with .djvu files virus. This file may be a familiar type of file such as .rar, .zip, .7z, .docx When infected such a file could be set to evade active security measures and complete the attack without leaving you any chance of detecting the malicious activities it performs on the background.

Since the security of your device and your data is of paramount importance we recommend you to use the help of free online scanners like VirusTotal and ZipeZip every next time you receive a questionable email that contains any of the mentioned components. With the help of these scanners, you will easily identify whether the components are malicious or not.

Other possible infection vectors that may be preferred by the creators of this .djvu crypto virus may be malicious advertising, browser redirects,

Skype viruses, potentially unwanted programs, infected third-party app installers and fake notifications for software updates.

.tro Files Virus – Overview

As identified by security researchers the so-called .tro files virus is a strain of STOP ransomware. After the release of a series of other strains of the same ransomware family including

.udjvu, .tfude, .uudjvu, and .pdff, hackers decided to shift to this brand new variant that is associated with the .tro extension.

Now let’s review what happens when this threat manages to run its payload file on a target system.
Initially, .tro files virus establishes a bunch of malicious files on the system. For their location, the ransomware may use the following folders:

  • %Roaming%
  • %Windows%
  • %AppData%
  • %Local%
  • %Temp%

With the help of all established malicious files, .tro ransomware interferes with the settings of essential system components. One of the affected components is likely to be the Registry Editor. Since it is a hierarchical database that keeps low-level settings for the Windows operating system, ransomware is often set to access and plague it. This could be explained by the fact that some registry keys’ functionalities enable the ransomware to load on each system start.

Soon after .tro implements all infection stages it drops a text file called _openme.txt and loads it on the screen. With the help of this file, it informs you about its presence and attempts to blackmail you into paying ransom for files decryption. Below you could see the whole message:

———————————————- ALL YOUR FILES ARE ENCRYPTED ———————————————–

Don’t worry, you can return all your files!
All your files documents, photos, databases and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees do we give to you?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can download video overview decrypt tool:
Don’t try to use third-party decrypt tools because it will destroy your files.
Discount 50% available if you contact us first 72 hours.
To get this software you need write on our e-mail:
Reserve e-mail address to contact us:
Your personal ID:

ransom note _openme.txt .tro files virus sensorstechforum

Beware that the decryption tool possessed by hackers is NOT the only method of recovering files. There are several alternative data recovery approaches that may be helpful for the restore process of corrupted files. Furthermore, there is no guarantee that hackers will send you a working decryption key even when the ransom is paid.

.tro Files Virus – Encryption Process

Once the encryption stage occurs, .tro fies virus activates an in-built module which is set to scan the system for certain types of files. When this infection module detects a file that belongs to the target data list of .tro ransomware, it utilizes sophisticated cipher algorithm that changes the original code of the file. Due to the applied changes you may not be able to access all of the following files:

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

A sure trait of a file encrypted by .tro files virus is an extension of the same name .tro appended to its name.

Remove .tro Files Virus and Restore Data

The ransomware associated with .tro extension is a threat with highly complex code that plagues not only your files but your whole system. So you should properly clean and secure your infected system before you could use it again. Below you could find a step-by-step removal guide that may be helpful in attempting to remove this ransomware. Choose the manual removal approach if you have previous experience with malware files. If you don’t feel comfortable with the manual steps select the automatic section from the guide. Steps there enable you to check the infected system for ransomware files and remove them with a few mouse clicks.

In order to keep your system safe from ransomware and other types of malware in future, you should consider the installation of a reliable anti-malware program. As an additional security layer that could prevent the occurrence of ransomware attacks you could install an

anti-ransomware tool.

If you want to understand how to potentially fix encrypted files with the help of alternative data recovery approaches, make sure to read carefully all details mentioned in the step “Restore files”. We remind you that before you begin with the data recovery process, you should back up all encrypted files to an external drive as this will help you to prevent their irreversible loss.

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 four years, researching malware and reporting on the latest infections.

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