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.Tro ransomware. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Ransomware

.Tro ransomware is a file locking malware that stems from STOP virus family

.Tro ransomware
.Tro ransomware is a file locking virus that was spotted locks up files and asks ransom to be paid for file release

.Tro ransomware is a cryptovirus that was recently noticed by independent cybersecurity researcher Michael Gillespie. It is a member of STOP family and a variant of Djvu ransomware, that was observed actively infecting users around mid-December 2018. This particular version does not differ from its predecessors much, although it is known to mostly be distributed with the help of fake Windows updates or malicious spam email attachments. It encrypts personal data with the help of a secure encryption algorithm and appends .tro extension, preventing victims from opening databases, documents, photos, videos, etc. Soon after the execution, .Tro ransomware virus contacts C&C[1] server to upload the personal key of the victim and sends out a ransom note _openme.txt which details the hacking attack. In case the malware fails to contact the remote server, it performs the encoding process offline and uses a hard-coded key.

Name .Tro ransomware
Type Cryptovirus
Family STOP
Variant of Djvu ransomware
File extension .tro
Ransom note _openme.txt
Contact pdfhelp@india.com and pdfhelp@firemail.cc
Decryptable? No
Elimination Use security software Reimage or Malwarebytes Malwarebytes

Tro ransomware was first spotted in January 2019, right after .pdff file virus showed up in the wild. Both of these infections have a lot of similarities, including the ransom note _openme.txt and the contact addresses – pdfhelp@india.com and pdfhelp@firemail.cc. The message also includes the link to a video online that displays the operation of the alleged decryptor. As usual, we do not recommend contacting cybercriminals and remove .Tro ransomware instead.

The ransom note from Tro virus authors also states that users can send a file for test decryption and that a 50% discount is available within first 72 hours of the infection. Victims are then asked to pay ransom in Bitcoin or another crypto, which typically was around $200 to $600.

.Tro ransomware also performs several changes to the system, including modification of Windows Registry, Shadow Volume Copies elimination, and similar adjustments. After successful .Tro ransomware removal, we recommend users employing PC repair software Reimage and performing full system scan.

As soon as the computer is safe and secure from infections (ransomware viruses can often be connected to several other threats, such as backdoors, trojans, and other malware), users can proceed with file recovery procedure. Since .Tro ransomware virus is not yet decryptable, victims can restore their data with the help of backups or third-party data recovery software. We explain how to use such applications below.

However, if no backups were kept and data recovery did not succeed, we suggest to keep the copy of the encoded files, as security experts are continually working on decryptor, and many instances proved to be successful, as proves No More Ransom project.[2]

Secure your computer from ransomware by being attentive online

Ransomware viruses are one of the most dangerous kind of infections that leave (sometimes irreversible) traces behind – encrypted files, as even if malware is removed, it will not decode the personal data. For that reason, avoiding the virus is the best choice. Unfortunately, not all users take cybersecurity seriously and fail to protect their PCs with anti-malware software, visit high-risk websites and similar. To reduce the possibility of the infection,[3] experts recommend following these tips:

  • Download and install reputable security software with real-time protection feature;
  • Backup your files regularly;
  • Avoid visiting domains that host pirated content;[4]
  • Do not open suspicious email attachments or click on links, as phishing emails are one of the main malware distribution methods;
  • Use strong passwords for RDP and other accounts;
  • Scan each executable with security software before opening it, no matter where it comes from;
  • Patch your system as soon as new updates roll out, as software vulnerabilities can often be abused by hackers to use exploit kits;
  • Be aware of fake updates that pop-up out of nowhere. Set up your software to roll automatic updates;

Get rid of .Tro ransomware with the help of reputable security software

.Tro ransomware removal should not be that complicated, as long as you can enter Safe Mode with Networking and perform necessary steps that are required by anti-virus software. However, one vital factor is that not all AV engines recognize all viruses, as different databases can be used, and not all of them are updated at the same time, failing to identify some viruses.

Therefore, we suggest you remove .Tro ransomware using anti-virus software that is capable of detecting this particular infection. That is why we recommend using Reimage or Malwarebytes MalwarebytesCombo Cleaner.

After .tro file virus elimination, you can try to recover your files. Do not forget that you need to delete the ransomware completely before connecting your backup device to the computer, as all the backup data will be encrypted as well.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove .Tro virus, follow these steps:

Remove .Tro using Safe Mode with Networking

To remove .Tro ransomware safely, enter Safe Mode with Networking as follows:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove .Tro

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete .Tro removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove .Tro using System Restore

You can also make use of System Restore in order to stop the virus:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of .Tro. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that .Tro removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove .Tro from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by .Tro, you can use several methods to restore them:

Make use of Data Recovery Pro to restore files

Data Recovery Pro is professional software that is helpful when files got accidentally deleted or otherwise corrupted. However, researchers observed the program sometimes to be useful for ransomware-affected file recovery.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by .Tro ransomware;
  • Restore them.

Windows Previous Versions Feature might help you recover some files

This feature can only be activated if System Restore was enabled before the virus attacked.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ShadowExplorer might be useful

Most of the ransomware viruses are programmed so that Shadow Volume Copies would be deleted. However, this procedure sometimes fails. In such a case, ShadowExplorer can recover 100% of encrypted files.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

No decryptor is available yet

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from .Tro and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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References