How to keep your computer safe from TFlower and other ransomware

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

TFlower ransomware removal instructions

What is TFlower?

Discovered by GrujaRS, TFlower is software categorized as ransomware. Unlike most ransomware-type programs, it does not change extensions of encrypted files. It does, however, create a ransom message (within a text file named "!_Notice_!.txt") that contains instructions about how to purchase a decryption tool. Typically, programs such as TFlower encrypt (lock) files, which then cannot be accessed unless they are decoded with a decryption tool (that cyber criminals encourage victims to purchase).

The ransom message ("!_Notice_!.txt") states that files can only be decrypted with the key that was used to encrypt them. To obtain a decryption tool, victims are encouraged to pay TFlower developers a ransom of 15 BTC (Bitcoin). To make this transaction, they must use the BTC wallet address provided in the ransom message. The message also contains a Tor website address that can be used for free decryption of one file, and an email  address ( that can be used to contact the cyber criminals who designed TFlower ransomware. 15 Bitcoins is a large sum of money, however, even if this is paid, there is a high probability that developers will not send tools to decrypt the files. Cyber criminals cannot be trusted, and people who do trust them are often scammed. Generally, only ransomware developers have the correct decryption tools/keys. Most ransomware-type programs perform encryptions that are impossible to decrypt without the involvement of cyber criminals. The only free way to retrieve files is to restore them from a backup, however, this is possible only when a backup exists (created prior to infection with ransomware).

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

TFlower decrypt instructions

Other ransomware examples are Format, Access, and Ndarod. Most of these programs have similar behavior: they encrypt data and create ransom messages that contain instructions about how to decrypt files (purchase tools required for decryption). Common differences are size of ransom (cost of a decryption tool/key) and cryptographic algorithm (symmetric or asymmetric) used to encrypt data. Typically, files cannot be decrypted without the correct tools and paying for them. In rare cases, encryptions can be 'cracked', but only when ransomware has bugs/flaws or other vulnerabilities. To prevent data and financial loss caused by these programs, maintain backups and keep them stored on a remote server or unplugged storage device.

How did ransomware infect my computer?

There is more than one way to distribute programs such as TFlower. In most cases, cyber criminals use spam campaigns, fake software update tools, untrustworthy software download channels, trojans, and unofficial activation tools. They use spam campaigns to send emails that contain malicious attachments, which are usually Microsoft Office documents, JavaScript files, archives (ZIP, RAR, or others), or executable files. If opened, these download and install malware. Fake software updaters infect systems using bugs/flaws of outdated, vulnerable software, or by downloading and installing malicious software rather than updates. Unofficial download sources are used to proliferate rogue software: cyber criminals upload malicious files that are disguised as regular/harmless. People who download and open them inadvertently cause installation of high-risk malware. Examples of dubious file or software download sources are torrent clients, eMule (other Peer-to-Peer) networks, third party downloaders, freeware download or free file hosting pages, and so on. Unofficial software activation tools are used to proliferate malware. Rather than activating software, they simply download and install malicious programs. Trojans cause chain infections: when installed, they download and install other malware.

Threat Summary:
Name TFlower virus
Threat Type Ransomware, Crypto Virus, Files locker
Ransom Demanding Message !_Notice_!.txt
Ransom Amount 15 BTC (Bitcoin)
BTC wallet address 14nfYK5frS6Jb4B3mthRffTQuTFfeM9un3
Cyber Criminal Contact,,
Detection Names Avast (Win32:Malware-gen), AVG (Win32:Malware-gen), DrWeb (Trojan.Siggen8.38390), Kaspersky (UDS:DangerousObject.Multi.Generic), 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.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
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.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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How to protect yourself from ransomware infections?

Do not open files that are attached to irrelevant emails or when the emails are received from unknown, suspicious addresses. Download files and programs from official and trustworthy websites. Do not use the sources mentioned above. Keep the operating system and installed software up-to-date, however, use tools and implemented functions created by official developers. The same applies to software activation: 'cracking' tools are illegal and cyber criminals often use them to distribute malware. Keep your computer secured with a reputable anti-virus or anti-spyware suite. If your computer is already infected with TFlower, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.

Text presented in TFlower ransomware text file ("!_Notice_!.txt"):



Dear Sir/Ma,

Sorry to inform you but many files of your COMPANY has just been ENCRYPTED with a STRONG key.
This simply means that you will not be able to use your files until it is decrypted by the same key used in encrypting  it.

TO get the DECRYPT TOOL for your COMPANY, you have to make payment to us so as to recover your files.
You have to pay sum of 15 BTC to bitcoin address below:
BITCOIN ADDRESS:=>>  14nfYK5frS6Jb4B3mthRffTQuTFfeM9un3




You may upload 1 of your encrypted files to test the decryption for free.
But, the file should not contain any valuable information.
All the operations can be done at following web site.
WEBSITE:=>> http://665vhhhfwgtpvq6765vektenyr5.....
E-MAIL :=>>

Screenshot of TFlower website:

TFlower website

Text presented in Tor website:

Bitcoin address is 14nfYK5frS6Jb4B3mthRffTQuTFfeM9un3
Payment state: Not yet    
Test: Clieck Here
Test file is "1.jpg".    
We have encrypted some of your files.
If you want to decrypt those files, you should pay 15 BTC to address 14nfYK5frS6Jb4B3mthRffTQuTFfeM9un3 to get your decrypt tool here.
After paying bitcoin, please login with the bitcoin address given to you and download the decrypt tool.
Note: Before making a payment, you may login and upload a file for decryption test.

Our email address is

Screenshot of files encrypted by TFlower:

Files encrypted by TFlower

TFlower ransomware removal:

Instant automatic malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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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 TFlower 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 TFlower 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 TFlower 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 TFlower 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 TFlower, 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 TFlower 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 as well as 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 TFlower 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 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.

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Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
TFlower 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 TFlower virus on your mobile device.
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