THREAT REMOVAL

Remove DirtyDecrypt (Revoyem) Ransomware and Restore Your Files

dirtydecrypt-ransomware-sensorstechforumInitially identified in July 2013, DirtyDecrypt Ransomware has been yet again revived. Researchers report that the crypto virus has spread on over 15 countries over the world with a high detection rate since its discovery. Also known as Revoyem, this ransomware chooses for its victims primarily PCs which are based in Europe and also in the United States of America. Despite this, we cannot guarantee that these cyber-attacks will not replicate to various other places as well. Given that ransomware attacks have “boom-ed” lately and the millions lost by users, it is strongly advisable to have relevant protection. In case you have been infected by DirtyDecrypt aka Revoyem, we strongly recommend reading the below-mentioned article to help you effectively deal with this threat and try to restore the files encoded by this virus.

Threat Summary

Name

DirtyDecrypt

TypeRansomware Virus
Short DescriptionDirtyDecrypt encrypts the victim’s files and asks for payment.
SymptomsDirtyDecrypt Ransomware locks the user’s PC and his files cannot be reached.
Distribution MethodVia exploit kits and visiting adult content websites.
Detection Tool See If Your System Has Been Affected by malware

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User ExperienceJoin our forum to Discuss DirtyDecrypt Ransomware.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

How Does DirtyDecrypt Replicate

To have a successful infection, DirtyDecrypt’s latest versions have been reported to take advantage of malicious .JS (JavaScript) files which have been uploaded on porn websites.

Another method of spreading the DirtyDecrypt is characterized by one common element – the usage of the Styx Exploit Kit. Such EK attacks may be common when massive spam e-mail campaigns are conducted. Lately, we have seen a tendency with old crypto viruses like DirtyDecrypt to conduct new spam campaigns and start re-infecting user PCs.

More Information About DirtyDecrypt (Revoyem) Ransomware

After research regarding this cyber-threat has been conducted by Symantec experts, they have established that computers which have been affected by DirtyDecrypt Ransomware have had the following OS’s installed on them:

  • Windows 2000
  • Windows NT
  • Windows XP
  • Windows Vista
  • Windows 7

After DirtyDecrypt Ransomware has been activated via one way or another, it may create malicious files that have random names in several Windows directories:

C:\ProgramFiles\Adobe\{random numbers and letters}.exe
C:\Users\{user profile}\AppData\Local\Temp\{random numbers and letters}.exe
C:\Users\{user profile}\AppData\Local\{random numbers and letters}.exe

Furthermore, DirtyDecrypt Ransomware starts blocking access to the computer by locking its screen and displaying an image to alert the user that his files are encoded. The image is named “DIRTY ALERT” and its message may look like the following:

“Files are encrypted
This file can be decrypted using the program DirtyDecrypt.exe
Press CTRL+ALT+D to run DirtyDecrypt.exe
If DirtyDecrypt.exe is not opened сheck the paths:
C:\Program Files\Dirty\DirtyDecrypt.exe
C:\Documents and Settings\{user profile}\Local Settings\Application Data\Dirty\DirtyDecrypt.exe
C:\Program Files (x86)\Dirty\DirtyDecrypt.exe
C:\Users\{user profile}\AppData\Roaming\Dirty\DirtyDecrypt.exe
C:\Documents and Settings\{user profile}\Application Data\Dirty\DirtyDecrypt.exe”

The cyber-criminals behind DirtyDecrypt do not mess around, and they have even provided the locations of the decryptor in case the victim experiences further difficulties. The cyber-crooks may use untraceable online payment methods, such as Ukash, PaySafeCard, MoneyPak and others to conduct the payoff while being undetected.

If you have decided to pay the ransom asked by DirtyDecrypt’s cyber-crooks, do not. There are several obvious reasons for that:

  • You help the cyber-criminals to further replicate DirtyDecrypt Ransomware.
  • You may not get back the access to your files.

We would also like to provide a reminder that the most efficient way to secure yourself against file-encryption by DirtyDecrypt is to back them up frequently. For more information about how to protect yourself against DirtyDecrypt, you can check the related article below:

Related Article: Safely Store Your Important Files and Protect Them from Malware

Regarding the file-encryption process of DirtyDecrypt ransomware, it scans primarily for files with the following file extensions:

7z, avi, doc, docm, docx, jpeg, jpg, mpeg, mpg, pdf, png, rar, rtf, wmv, xls, xlsm, xlsx, zip

The encrypted files by DirtyDecrypt can no longer be opened because their code has been scrambled with an advanced encryption algorithm, which may contain one or more ciphers from the RSA, AES, XOR and other types.

DirtyDecrypt Ransomware – Remove It and Restore Encoded Files

To completely delete DirtyDecrypt(Revoyem) Ransomware virus, you should isolate the threat before removing it. To do this, we advise you to carefully follow the removal instructions below and boot your computer in Safe Mode. From there, you may want to go over and take a look at the Manual and Automatic options for removal below. In case DirtyDecrypt modifies various registry entries and creates additional files, experts strongly advise using an advanced anti-malware program to automatically remove the virus in safe mode without damaging your computer.

In case you want to restore files encoded by DirtyDecrypt Ransomware, we strongly suggest that you take advantage of the alternative solutions for file restoration which we have provided below. They are not 100 percent guarantee you will get your files back, but they are the best alternative solutions you can get to until a decryptor has been released for free in public. When such software is released, make sure to follow this article – we will update it with a download URL for the decryptor.

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Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.


OFFER

REMOVE IT NOW (PC)
with Anti-Malware
We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.
SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy


Windows Mac OS X

How to Remove DirtyDecrypt from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove DirtyDecrypt

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall DirtyDecrypt and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by DirtyDecrypt on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by DirtyDecrypt there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for DirtyDecrypt with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by DirtyDecrypt.

Ransomware infections and DirtyDecrypt aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


Windows Mac OS X

Get rid of DirtyDecrypt from Mac OS X.


Step 1: Uninstall DirtyDecrypt and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to DirtyDecrypt:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to DirtyDecrypt. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to DirtyDecrypt. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove DirtyDecrypt via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as DirtyDecrypt. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Click the button below below to download SpyHunter for Mac and scan for DirtyDecrypt:


Download

SpyHunter for Mac



Step 3 (Optional): Try to Restore Files Encrypted by DirtyDecrypt.

Ransomware infections and DirtyDecrypt aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.


DirtyDecrypt FAQ

What is DirtyDecrypt ransomware and how does it work?

DirtyDecrypt is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does DirtyDecrypt ransomware infect my computer?

Via several ways.DirtyDecrypt Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of DirtyDecrypt is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .DirtyDecrypt files?

You can't. At this point the .DirtyDecrypt files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .DirtyDecrypt files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by DirtyDecrypt ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".DirtyDecrypt" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .DirtyDecrypt files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of DirtyDecrypt ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate DirtyDecrypt ransomware and then remove it without causing any additional harm to your important .DirtyDecrypt files.

Also, keep in mind that viruses like DirtyDecrypt ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

  • Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
  • Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
  • Also, check if some of the files that were encrypted it can be re-downloaded from the web.
  • Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
  • You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.

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