How to remove Delta Plus Ransomware and decrypt .delta files

What is Delta Plus Ransomware

Delta Plus is a ransomware-type virus that uses cryptographic algorithms to encrypt personal data. It assigns strong ciphers that are hard to decode without special decryption tools held by cybercriminals themselves. To buy these tools, victims are requested to send the equivalent of 6,000 USD in BTC to a crypto address. The price for decryption may be also reduced to 3,000 USD if you manage to complete the payment within the first 72 hours after being infected. All of this information is disclosed inside of the text note called Help Restore Your Files.txt, which is created as soon as the encryption of files is done. Delta Plus appends the .delta extension to all affected files. For instance, a file like 1.pdf will change to 1.pdf.delta and lose its original icon. After these changes, users will no longer be able to access their files until they pay the required ransom.

Before purchasing the necessary decryption tool, cybercriminals also offer a so-called guarantee – to send 1 file for test decryption for free. This file should be small and contain no valuable information. Communication with cybercriminals can be established directly through their e-mail address (decryptdelta@gmail.com). Unfortunately, files affected by Delta Plus Ransomware are chained by strong ciphers indeed, which makes their decryption without cybercriminals almost unapproachable. You can give it a try using the third-party tools we mentioned below, but there is a risk it will fail and result in permanent damage. This is why the best solution whenever it comes to encrypted files is to recover them via backup copies. If you had them created and stored in an external location prior to the infection, then you can get your data back easily. In other cases, the only, yet risky way to avoid paying the ransom is using other third-party tools. You can find more information on both removal and restore options down below.

How Delta Plus Ransomware infected your computer

Crypto-extortioners like Delta Plus Ransomware are usually distributed via malicious e-mail spam messages, trojans, unprotected RDP configuration, backdoors, keyloggers, fake software cracking tools, unreliable updates, pirated programs, and other content downloaded from unofficial resources. However, the most abused method of proliferating malware is usually considered to be e-mail spam letters. These letters are often disguised as something legitimate or urgent and contain malicious attachments or links leading to fake download pages. The range of attachments that cybercriminals use is often with MS Office documents, PDFs, Archive, Executable, or JavaScript files altered to launch installation scripts. Website links can also be seen quite often. They lead to pages with fake legitimate software asked to be downloaded. No matter which distribution method you put under dissection, it will work itself out only thanks to users’ inexperience and inattentiveness. To decrease the risk of getting infected with malware to the very minimum, users should use only trusted and official installers, avoid cracking tools, suspicious advertisements, and various websites that can distribute malvertising software. Besides removal instructions, we also prepared a full security guide to protect yourself against such threats in the future down below.

1. Download Delta Plus Ransomware Removal Tool
2. Get decryption tool for .delta files
3. Recover encrypted files with Stellar Data Recovery Professional
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like Delta Plus Ransomware

Delta Plus Ransomware files:


Help Restore Your Files.txt
{randomname}.exe


Delta Plus Ransomware registry keys:

no information

How to decrypt and restore .delta files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .delta files. Download it here:

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .delta files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Delta Plus Ransomware and removed from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .delta files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select type of files you want to restore and click Next button.
4. Choose location where you would like to restore files from and click Scan button.
5. Preview found files, choose ones you will restore and click Recover.

Using Windows Previous Versions option:

1. Right-click on infected file and choose Properties.
2. Select Previous Versions tab.
3. Choose particular version of the file and click Copy.
4. To restore the selected file and replace the existing one, click on the Restore button.
5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
3. Select the drive and date that you want to restore from.
4. Right-click on a folder name and select Export.
5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

1. Login to the DropBox website and go to the folder that contains encrypted files.
2. Right-click on the encrypted file and select Previous Versions.
3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like Delta Plus Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

ZoneAlarm Anti-Ransomware Dashboard

ZoneAlarm Anti-Ransomware Alert

ZoneAlarm Anti-Ransomware Blocked

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

2. Back up your files

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Delta Plus Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.