SD 1.1 Ransomware

Also Known As: TrueCrypt virus
Distribution: Low
Damage level: Severe

TrueCrypt ransomware removal instructions

What is TrueCrypt?

TrueCrypt is another ransomware infection that infiltrates systems and then encrypts stored files. Types of targeted files include .rar, .7zip, .php, .doc., .pdf, and many others. During encryption, TrueCrypt adds the .enc extension to compromised files. This ransomware uses AES-256 encryption and, thus, public (encryption) and a private (decryption) keys are generated during the encryption process. Therefore, files can supposedly only be restored using the private key, which is stored on C&C (Command & Control) servers managed by cyber criminals. To receive this key, victims must pay a ransom.

TrueCrypt ransomware changes the victim's desktop wallpaper with an image containing a message, which states that files are encrypted and the victim must pay a specific sum to restore them. Developers of TrueCrypt accept Bitcoins and Amazon Gift Cards. The size of ransom is equivalent to 0.2 BTC (at time of research, equivalent to $93.96) or $115 (depending on the payment method chosen by the victim). It is also stated that payment must be made within 72 hours, otherwise the private key will be deleted forever and it will then be impossible to restore the encrypted files. Victims are provided with step-by-step payment instructions. Furthermore, they are able to contact the cyber criminals via an e-mail address provided if any help is required. This ransomware stores the list of encrypted files within the %APPDATA%\Microsoft\TrueCrypter\Encrypted.dat file. Fortunately, the TrueCrypt decryptor, which victims must use to send the Bitcoin transaction/Amazon Gift Card ID, has a major flaw. There is no need to pay the ransom, nor enter any kind of ID. Victims simply need to click the 'Pay' button, confirm that the information is correct, and the files will be automatically decrypted. The ransomware will be automatically uninstalled afterwards.

Screenshot of a message encouraging users to contact the developers of TrueCrypt ransomware to decrypt their compromised data:

TrueCrypt decrypt instructions

Research results show that paying the ransom does not guarantee that your files will ever be decrypted. Therefore, you should never attempt to contact cyber criminals, nor pay the ransom. TrueCrypt is similar to Cerber, TeslaCrypt, Locky, CryptoWall, and tens of other ransomware infections. All encrypt files using an asymmetric encryption method. The only difference is the size of ransom, which usually fluctuates between 0.5 and 1.5 Bitcoin. Be aware that malware such as TrueCrypt is often distributed using malicious email attachments, peer-to-peer (P2P) networks (e.g., Torrent), fake software updates, and/or trojans. You should, therefore, use legitimate anti-virus/anti-spyware, keep your installed software up-to-date, and be cautious when downloading files sent from unrecognized/suspicious and third party peer-to-peer networks.

Text presented on the TrueCrypt desktop wallpaper:

If you see this text, probably your computer got encrypted by TrueCrypter. This means all your important files (documents, images, etc.) are now unaccessible and you will lose them forever unless your pay a sum of money to get your decryption key.
The decryption key uses the RSA-2048 algorithm, impossible to crack. Your files will be lost forever without paying.

If you don;t case about your files, just uninstall this software.
If you lost the application because your antivirus deleted it, or you need help, you can contact is on our email:
(You only have 72 hours before your private key will be destroyed, hurry up if you want to save your files!)

TrueCrypt accepts ransom payments in Bitcoins:

TrueCrypt decryptor accepting Bitcoins

Text presented within this window:

You have to send EXACTLY BTC to the following address: and specify the Transaction ID on the next page, which will be verified and confirmed.
1)Create a Bitcoin Waller (We suggest:
2)Buy some Bitcoins (We suggest:,
3) Send BTCs to
4) After yousent the Bitcoins, specify the Transaction ID down here.

TrueCrypt accepts payments in Amazon Gift Cards:

TrueCrypt decrypter accepting Amazon Gift Cards

Text presented within this window:

You have to buy a 115 USD Amazon Gift Card and specify the Gift Code onto the next page. Make sure you buy it from the .com domain!


1) Navigate to the following Url hxxps://

2) Enter an amount of a USD.

3) Enter your email and a fake/real name.

4) Click “Proceed to Checkout”.

5) After you complete the payment, specify the Gift Code from your email down here.

Screenshot of the TrueCrypter information window:

TrueCrypt window stating that the files have been encrypted

Text presented within the information window:

>What happened?

All your important documents on this computer (Images, Videos, etc.) were encrypted using an unique RSA-2048 Public Key.

>How can I restore my files?

In order to decrypt your files you need your Private Key, which is situated on our hidden server. The only way to obtain it, is by paying a sum of money. Without the key, there is no way to unblock your files.

>How can I pay?

We currently accept payments in Bitcoins or AGCs (Amazon Gift Cards).

File types targeted by TrueCrypt ransomware:

.7z, .7zip, .arw, .as, .asm, .asp, .aspx, .au3, .avi, .bash, .bat, .bmp, .bookmarks, .bsh, .c, .cbr, .cc, .cer, .cfm, .class, .cmd, .config, .cpp, .cr2, .crw, .cs, .csh, .csproj, .csr, .css, .csv, .cxx, .d, .db, .dcr, .dds, .deb, .dib, .dng, .doc, .docm, .docx, .dot, .dotm, .dotx, .dtd, .eps, .fla, .fpx, .gif, .gif, .gz, .gzip, .h, .hpp, .hta, .htm, .html, .hxx, .ico, .inc, .inc, .index.ini, .jad, .java, .jfif, .jpe, .jpeg, .jpg, .js, .jsm, .json, .jsp, .jss, .jsx, .kix, .lex, .litcofee, .lpr, .lua, .m, .mov, .mp3, .mp4, .mrw, .msg, .mx, .nef, .ods, .odt, .odt, .org, .p, .pages, .pas, .pcd, .pdf, .pdn, .php, .php3, .php4, .php5, .phps, .phpt, .phtml, .pkg, .pl, .pm, .pmx, .png, .pot, .potm, .potx, .pp, .ppam, .ppsm, .ppsx, .pptm, .pptx, .prproj, .ps, .ps1, .psd, .psm1, .ptx, .pwi, .py, .pyc, .pyw, .r, .raf, .rar, .raw, .rb, .rbw, .rc, .reg, .resx, .rpm, .rss, .rtf, .rtf, .rw2, .s, .scpt, .sh, .sh, .shtml, .sitx, .sldm, .sldx, .sln, .splus, .sql, .sqlite, .sqlite3, .src, .swift, .sxc, .tar, .tar.gz, .tga, .tga, .thmx, .tif, .tiff, .ts, .tsv, .tsx, .txt, .vb, .vbs, .vcxproj, .veg, .wmw, .wpd, .wps, .xcodeproj, .xht, .xhtm, .xhtml, .xls, .xlsx, .xml, .zip, .zipx, pps, ppt, xlam, xlsb, xlsm, xltm, xltx

Update June 13, 2019 - Cyber criminals have recently released an updated version of this ransomware (known as SD 1.1 ransomware) which appends filenames with ".[].enc" extension. It also creates a text file ("ReadMeToDecrypte.txt") and changes victim's desktop wallpaper.

Screenshot of "" text file:

SD 1.1 ransomware text file

Text presented within this file:

We are realy sorry to inform you that  ALL YOUR FILES WERE ENCRYPTED
by our automatic software. It became possible because of bad server security.  
Please don't worry, we can help you to RESTORE your server to original
state and decrypt all your files quickly and safely!

Files are not broken!!!
Files were encrypted with AES-128+RSA-2048 crypto algorithms.
There is no way to decrypt your files without unique decryption key and special software. Your unique decryption key is securely stored on our server.
* Please note that all the attempts to recover your files by yourself or using third party tools will result only in irrevocable loss of your data!
* Please note that you can recover files only with your unique decryption key, which stored on our server.

Please write us to the e-mail (write on English or use professional translator):
We recommed you to attach 3 encrypted files to your message. We will demonstrate that we can recover your files.
*   Please note that files must not contain any valuable information and their total size must be less than 5Mb.

Please be sure that we will find common languge. We will restore all the data and give you recommedations how to configure the protection of your server.

Screenshot of the desktop wallpaper:

SD 1.1 ransomware desktop wallpaper

Text presented within this image:

All Your Files Have Been Encrypted By SD 1.1

Dear Owner

All your files have been encrypted by our software , don't worry

You can restore all your files and you must buy decryptor for further steps contact our email

Screenshot of files encrypted by the updated variant (".[].enc" extension):

Files encrypted by SD 1.1 ransomware

Threat Summary:
Name SD 1.1
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .[].enc
Ransom Demanding Message Desktop wallpaper, ReadMeToDecrypte.txt text file
Cyber Criminal Contact
Detection Names Avast (FileRepMalware), BitDefender (Trojan.GenericKD.41368642), ESET-NOD32 (Python/Filecoder.CE), Kaspersky (Trojan-Ransom.Win32.Crypren.afjr), Full List Of Detections (VirusTotal)
Symptoms Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Additional Information This ransomware was previously known as TrueCrypt.
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.

To eliminate malware infections our security 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.

TrueCrypt ransomware removal:

Instant automatic malware removal: 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 malware. 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":

Step 2

Log in to the account infected with the TrueCrypt 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 TrueCrypt 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 TrueCrypt 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 TrueCrypt 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 TrueCrypt, 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 encrypting ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and Malwarebytes Anti-Ransomware, which artificially implant group policy objects into the registry to block rogue programs such as TrueCrypt ransomware.)

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 TrueCrypt 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.

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

Removal Instructions in other languages
Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
TrueCrypt 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 TrueCrypt virus on your mobile device.
We Recommend:

Get rid of Windows malware infections today:

Download 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.