Doubleoffset Ransomware

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

Doubleoffset ransomware removal instructions

What is Doubleoffset?

Doubleoffset is a computer infection that belongs to the Cryakl ransomware family. Typically, cyber criminals attempt to infect computers with ransomware for the purposes of blackmail - they demand ransom payments in return for decryption tools or keys. Doubleoffset renames all encrypted files by prepending the "[victim's_ID].fname-" string and adding the ".doubleoffset" extension. For example, "1.jpg" might be renamed to a filename such as "". Doubleoffset also generates a "README.txt" text file and opens a pop-up window. Other variants of this ransomware use "" extension for encrypted files.

The pop-up window and "README.txt" text file contain the email address and a message stating that all files were encrypted and, to decrypt them, victims must contact cyber criminals (Doubleoffset developers) via the email address. Ransomware developers sometimes give more details, such as ransom size, cryptography algorithm used to encrypt files, how quickly victims must make contact, and so on. In this case, however, they provide only an email address. Further details might be provided when they are contacted, but this does not generally result in any positive outcome. They often ignore victims even if their demands are met and ransoms are paid. Unfortunately, only they can provide decryption tools or keys, which they store on remote servers controlled by them. Furthermore, most cyber criminals employ cryptography algorithms that are usually impossible to crack without the involvement of ransomware developers. If your computer is infected with Doubleoffset, it is likely that the only free way to reclaim encrypted files is to use a backup and restore them from there.

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

Doubleoffset decrypt instructions

Most ransomware-type infections lock (encrypt) data and keep it in that state until the ransom is paid. Some examples of other ransomware infections are Gerber, Outsider and Santa. The most common differences between viruses of this type are ransom size and cryptography algorithm used to encrypt data. The algorithms cannot usually be cracked and victims are encouraged to purchase a tool or key. Alternatively, decryption might be possible if the virus is still in development or contains bugs/flaws that remain unfixed. To avoid data loss caused by ransomware such as Doubleoffset, we recommend that you maintain regular backups and store them on unplugged devices or remote servers.

How did ransomware infect my computer?

It is not known exact which method developers use to proliferate the Doubleoffset virus, however, common ways include spam email campaigns, trojans, untrustworthy download sources, and fake software updaters. Criminals use spam email campaigns by sending many emails that contain malicious (infected) attachments. The main purpose is to trick recipients into opening the attachment (often an executable file, archive file [such as RAR], PDF file, Microsoft Office document, etc.). When downloaded and opened, it infects the computer with viruses, in this case ransomware. Trojans (malicious programs) proliferate other viruses, thus causing chain infections. Free file hosting websites, freeware download websites, peer-to-peer networks (such as torrent clients, eMule, and so on) and other dubious third party software download sources, are used to present malicious files as legitimate files. Using these tools, cyber criminals often trick people into downloading and installing malicious software. Fake software updaters are also used to proliferate infections. They infect systems by downloading and installing malicious software rather than the updates, or by exploiting bugs/flaws of outdated software.

Threat Summary:
Name Doubleoffset virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .doubleoffset (also prepends filenames with "[victim's_ID].fname-" string).
Ransom Demanding Message README.txt text file, pop-up window.
Cyber Criminal Contact,
Detection Names Avast (Win32:Malware-gen), BitDefender (Trojan.GenericKD.41348577), ESET-NOD32 (A Variant Of Generik.JKXPIIU), Kaspersky (Trojan.Win32.Inject.alrze), Full List Of Detections (VirusTotal)
Rogue Process Name Usually a random string (e.g., "ADFHLNORSV.exe").
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.
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 Doubleoffset 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?

Browse the Internet, download, install, and update software with care. Do not download and open attachments that are presented in emails received from unknown or suspicious addresses. If the email seems irrelevant, do not download and open the attachment (or web link). Download software using official, trustworthy sources and direct links. Avoid using third party downloaders, installers, unofficial websites, and other dubious sources that might be used by cyber criminals. Never use unofficial tools to update software that is installed on your computer. These might cause inadvertent installations of unwanted software or even computer infections. Use only those tools that are provided by official developers. You are strongly advised to have anti-virus/anti-spyware software installed - these tools can prevent computers from infection with viruses or other threats. If your computer is already infected with Doubleoffset, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Screenshot of a pop-up window displayed by Doubleoffset:

Doubleoffset ransomware pop-up window

Text presented in Doubleoffset pop-up window and text file ("README.txt"):

Your files was encrypted! To decrypt write us 

Screenshot of the Doubleoffset process ("ADFHLNORSV.exe", the process name is typically a random string) in Windows Task Manager:

Doubleoffset ransomware process in Task Manager

Screenshot of files encrypted by Doubleoffset (".doubleoffset" extension):

Files encrypted by Doubleoffset

Doubleoffset ransomware removal:

Instant automatic removal of Doubleoffset 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 Doubleoffset 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 Doubleoffset 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 Doubleoffset 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 Doubleoffset 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 Doubleoffset 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 Doubleoffset, 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 Doubleoffset 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 Doubleoffset 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.

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Malware activity

Global virus and spyware activity level today:

Medium threat activity

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

QR Code
Doubleoffset 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 Doubleoffset virus on your mobile device.
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Platform: Windows

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