A ransomware infection, reported as a new version of Nemucod Ransomware that is spread via the same malicious e-mail spam used to spread Locky ransomware has appeared, infecting different Windows OS machines. Dubbed Nemucod or .Crypted virus, the ransomware infection may use an encryption algorithm to make the files on the infected computer no longer openable. The virus drops a DECRYPT.txt file in which it asks the victims to pay the sum of 0.23 BTC to get the files decrypted again. In case you have become a victim of the Crypted ransomware, advices are to read the following article carefully.
|Short Description||The user may witness a file “DECRYPT.txt” on his desktop and the ransom message to open in a text document every time Windows starts.|
|Symptoms||The user may witness ransom notes and “instructions” linking to a web page and a decryptor. The .crypted file extension is used.|
|Distribution Method||Via the notorious Kovter malicious e-mail spam carrying .zip email attachments.|
|Detection Tool|| See If Your System Has Been Affected by malware |
Malware Removal Tool
|User Experience||Join our forum to Discuss .Crypted Virus.|
|Data Recovery Tool||Windows 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.|
.Crypted File Virus – Infection Process
The infection of this virus is conducted via malicious e-mail spam, also known as malspam. Malware researcher at malware-traffic-analysis.net has reported that multiple malicious files are spread via e-mails that pretend to be customer service from post services. One particular e-mail was a fake UPS service mail with the following content:
Your item has arrived at the UPS Post Office at March 12, but the courirer was unable to deliver parcel to you!
Please check the attachment for complete details!
UPS Parcels Delivery Clerk.
The virus uses the port 80 for all communication of those domains.
After an infection is already conducted, the Crypted virus drops the following files on the infected computer.
- A .bat file with a random name, for example f332.bat, located in a random named folder in the %Local% directory.
- Another randomly named file in the same folder with unknown format.
- A .doc file in the %Temp% folder, usually named with one latin letter.
- A one letter .txt file in the same %Temp% folder.
- Two more executable files in %Temp%, named with letter and number, for example b1.exe and b2.exe.
.Crypted File Ransomware – Post-Infection Activity
Once the Crypted ransomware causes an infection, it does not change the wallpaper, but rather drops and opens a .txt file, named DECRYPT.txt. This file is the virus ransom note and it aims to notify the user of the demands of the cyber-criminals who have infected the computer. The content of DECRYPT.txt is the following:
All your documents, photos, databases and other important personal files
were encrypted using strong RSA-1024 algorithm with a unique key.
To restore your files you have to pay 0.21753 BTC (bitcoins).
Please follow this manual:
1. Create Bitcoin wallet here:
2. Buy 0.21753 BTC with cash, using search here:
3. Send 0.21753 BTC to this Bitcoin address:
4. Open one of the following links in your browser to download decryptor:
5. Run decryptor to restore your files.
– If you do not pay in 3 days YOU LOOSE ALL YOUR FILES.
– Nobody can help you except us.
– It`s useless to reinstall Windows, update antivirus software, etc.
– Your files can be decrypted only after you make payment.
– You can find this manual on your desktop (DECRYPT.txt).”
When one of the websites are visited, the page does not let the user, if the ransom is not paid, meaning that the cyber-criminals may use IP address whitelist and allow only the IP addresses of victims that have paid the ransom.
Among these activities, the Crypted ransomware infection may also perform other types of infection activities, like create malicious registry values to run the executables in %AppData% that encrypt files automatically when Windows starts. The usually targeted registry keys for this are the Run and RunOnce sub-keys in the Windows Registry Editor.
In addition to this, the Crypted virus may also perform a deletion of any backups and shadow copies of the infected computer.
Crypted Ransomware – Encryption Information
Regarding the encryption procedure of Crypted ransomware, it is widely believed this virus uses the RSA (Rivest Shamir Adleman) encryption algorithm with the strength of 1024 bits. This type of encoding procedure results in the generating of unique decryption keys for each encrypted file or set of files. The encryption can be configured to encrypt the whole file, but there are files with huge sizes, this is why it may be coded to encode a portion of the file, enough to make it no longer openable.
For the encryption, various types of files may be targeted, like documents, pictures, audio files, music and other data of importance. To sum it up, .crypted files could become most of the following file types:
After the encryption process by the .crypted file virus has been completed, the encoded files appear like the following and cannot be opened:
Whatever the situation may be, paying the ransom is not advisable since the virus may be
Remove .Crypted Ransomware and Restore Infected Files
The removal of the ransomware is rather simple than complicated. Since it may have an active connection to several remote servers, we advise following the removal instructions below to break this connection and remove the malicious files and entries. This can happen by downloading an advanced anti-malware tool and scanning the computer in offline Safe Mode with no third-party applications running and no active connection.
If you want to decrypt your files, you are lucky, because this is one of the few ransomware variants that have a working decryptor. The credit for that goes to Emsisoft researchers who have developed Nemucod decrypter. To see how to work with the decryptor and revert your files, please check the instructions in this article after you perform the removal of this virus below.
- Guide 1: How to Remove .Crypted Virus from Windows.
- Guide 2: Get rid of .Crypted Virus from Mac OS X.
- Guide 3: Remove .Crypted Virus from Google Chrome.
- Guide 4: Erase .Crypted Virus from Mozilla Firefox.
- Guide 5: Uninstall .Crypted Virus from Microsoft Edge.
- Guide 6: Remove .Crypted Virus from Safari.
- Guide 7: Eliminate .Crypted Virus from Internet Explorer.
How to Remove .Crypted Virus from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove .Crypted Virus
Step 2: Uninstall .Crypted Virus 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.
Step 3: Clean any registries, created by .Crypted Virus on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by .Crypted Virus there. This can happen by following the steps underneath:
Get rid of .Crypted Virus from Mac OS X.
Step 1: Uninstall .Crypted Virus and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- 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 .Crypted Virus 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:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove malware from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove .Crypted Virus from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase .Crypted Virus from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall .Crypted Virus from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove .Crypted Virus from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the .Crypted Virus will be removed.
Eliminate .Crypted Virus from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.