How to remove Topi ransomware and prevent it from further encryptions?

Also Known As: Topi virus
Distribution: Moderate
Damage level: Severe

Topi ransomware removal instructions

What is Topi?

Topi is a malicious program, part of the Stop/Djvu ransomware family. Credit for its discovery belongs to Michael Gillespie. Systems infected with this malware have their data encrypted and receive ransom demands for the decryption. As Topi ransomware encrypts, all files are appended with the ".topi" extension. For example, a file like "1.jpg" would appear as "1.jpg.topi" - following encryption. After the process is complete, a text file - "_readme.txt" is dropped onto the desktop.

The text presented in "_readme.txt" is the ransom note. It states that all of the victims' data has been encrypted, yet it can be recovered. To do so, users are informed that they must purchase a decrypt tool and unique key from the developers of Topi. Before paying, victims can test decryption by sending the cyber criminals behind the infection - one encrypted file (yet, it cannot contain valuable information). The price of said decryption tools/keys is $980. However, should users contact the criminals within the first 72 hours, the ransom can be reduced by 50% ($490). To receive further information/instructions, victims are to write to the email addresses provided. It is true that in most cases of ransomware infections - decryption is impossible without the involvement of the individuals responsible. It can be possible, if the malicious program is still in development and/or has key flaws/bugs. Whatever the case, it is expressly advised against meeting the demands of cyber criminals. They are not to be trusted and often, despite paying - victims do not receive the necessary tools/software to decrypt their data. Therefore, not only do their files remain encrypted and worthless, but they also experience significant financial losses. Removing Topi ransomware will prevent it from further encryptions, however removal will not restore already affected data. The sole solution is recovering it from a backup, if one was made prior tot he infection and was stored in a different location.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

Topi decrypt instructions (_readme.txt)

Ransomware is designed to encrypt files and to demand payment for the decryption tools/software. CubaNEWSMakop and Ragnarok are examples of malicious software within the category. However, there are some crucial differences between them, such as - the cryptographic algorithm they use (symmetric or asymmetric) and the ransom size. These sums usually range from three to four digits (in USD). Cryptocurrencies (or other digital currencies) are commonly used for the ransoms, as transactions of them are difficult/impossible to trace. To protect files from data encrypting infections, it is recommended to keep backups in remote servers and/or unplugged storage devices. Ideally, multiple backups should be stored in several separate locations.

How did ransomware infect my computer?

Ransomware and other malware mainly proliferate through spam campaigns, trojans, illegal activation tools ("cracks"), fake updaters and untrustworthy download channels. Spam campaigns are used to send thousands of deceptive emails with infectious files attached to (or linked in) them. These letters are typically disguised as "official", "important", "priority" or otherwise "urgent". The virulent attachments come in a variety of formats (e.g. archive and executable files, PDF and Microsoft Office documents, JavaScript, etc.), when they are opened - it triggers them to begin the infection (i.e. download/install malware). Trojans are malicious programs, capable of causing chain infections. Rather than activate licensed product, illegal activation ("cracking") tools can download/install malware. Fake updaters cause infections by abusing weaknesses of outdated software and/or by simply installing malware instead of the promised updates. Untrustworthy download sources like unofficial and free file-hosting sites, Peer-to-Peer sharing networks (BitTorrent, eMule, Gnutella, etc.) and other third party downloaders - can offer malicious programs for downloading.

Threat Summary:
Name Topi virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .topi
Ransom Demanding Message _readme.txt
Ransom Amount $980/$490
Cyber Criminal Contact helpmanager@firemail.cc and helpmanager@iran.ir
Detection Names AVG (FileRepMalware), BitDefender (Trojan.GenericKD.32980969), ESET-NOD32 (A Variant Of Win32/Kryptik.HANB), Kaspersky (Trojan-Ransom.Win32.Stop.im), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Additional Information This malware is designed to show a fake Windows Update window and modify the Windows "hosts" file to prevent users from accessing cyber security websites (more information below).
Distribution methods Infected email attachments (macros), torrent websites, malicious ads, unofficial activation and updating tools.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.
Removal

To eliminate Topi virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

It is recommended not to open suspect and/or irrelevant emails. Any attachments (or links) present in dubious mail - must never be opened, as doing so can lead to an infection. All downloads should be done only from official and verified download channels. Program activation and updating should be done using functions/tools provided by legitimate developers. Illegal activation tools ("cracks") and third party updaters are considered to be high-risk, therefore they are advised against use. It is paramount to device/user safety to have a dependable anti-virus/anti-spyware suite installed. Furthermore, this software must be kept up-to-date, set to perform regular system scans and to remove detected/potential threats. If your computer is already infected with Topi, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Topi ransomware's text file ("_readme.txt"):

ATTENTION!

Don't worry, you can return all your files!
All your files like photos, databases, documents 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 you have?
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 get and look video overview decrypt tool:
hxxps://we.tl/t-UdTNsLeiJA
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.


To get this software you need write on our e-mail:
helpmanager@firemail.cc

Reserve e-mail address to contact us:
helpmanager@iran.ir

Your personal ID:
0200a7d6a8sda11RTgLbx9E2Fpqa5NdnA3tetVhoimUiNjNEtCSVq

Screenshot of files encrypted by Topi (".topi" extension):

Files encrypted by Topi ransomware (.topi extension)

Screenshot of fake Windows update pop-up displayed during the encryption:

Fake Windows pop-up displayed by Topi during the encryption

IMPORTANT NOTE! - As well as encrypting data, ransomware-type infections from the Djvu malware family also add a number of entries to the Windows "hosts" file. The entries contain URLs of various websites, most of which are related to malware removal. This is done to prevent users from accessing malware security websites and seeking help. Our website (PCrisk.com) is also on the list. Removing these entries, however, is simple - you can find detailed instructions in this article (note that, although the steps are shown in the Windows 10 environment, the process is virtually identical on all versions of the Microsoft Windows operating system).

Screenshot of websites added to Windows hosts file:

Tro Ransomware adding websites to Windows Hosts file

There are currently two versions of Djvu ransomware infections: old and new. The old versions were designed to encrypt data by using a hard-coded "offline key" whenever the infected machine had no internet connection or the server was timing out/not responding. Therefore, some victims were able to decrypt data using a tool developed by cyber security researcher, Michael Gillespie, however, since the encryption mechanism has been slightly changed (hence the new version, released in August, 2019), the decrypter no longer works and it is not supported anymore. If your data has been encrypted by an older version, you might be able to restore it with the another tool developed by Emsisoft and Michael Gillespie. It supports a total of 148 Djvu's variants and you can find more information, as well as download link and decryption instructions in Emsisoft's official page.

Screenshot of Djvu decryption tool by Emsisoft and Michael Gillespie:

Djvu ransomware decrypter by Michael Gillespie and Emsisoft

Additionally, Emsisoft is now providing a service that allows to decrypt data (again, only if it was encrypted by Djvu variants released before August, 2019) for those victims who have a pair of the same file before and after the encryption. All victims have to do is upload a pair of original and encrypted file to Emsisoft's Djvu decryption page and download the aforementioned decryption tool (the download link will be provided after uploading files). Note that the file processing may take some time so be patient. It is also worth mentioning that the system must have an Internet connection during the entire decryption process, otherwise it will fail.

Screenshot of Emsisoft's Djvu decryption service page:

Djvu ransomware decryption service by Emsisoft

Topi ransomware removal:

Instant automatic removal of Topi virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Topi virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the Topi virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Topi ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Topi ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Topi are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by Topi, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Topi ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove Topi ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Topi virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Topi virus on your mobile device.
We Recommend:

Get rid of Topi virus today:

▼ REMOVE IT NOW with Spyhunter

Platform: Windows

Editors' Rating for Spyhunter:
Editors ratingOutstanding!

[Back to Top]

Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.