Complete .wyvern Virus Removal Guide (Full Instructions)

Active .wyvern virus infections can be recovered using our in-depth guide on restoring your computer and data, read our article to learn more.

Manual Removal Guide
Recover .wyvern Virus Files
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How Does .wyvern Virus Infiltrate the System?

The .wyvern virus can be delivered to the victims using different methods depending on the campaign. At the moment the virus seems to target mainly English-speaking users.

A popular way to spread the threat is to use email spam messages. They use various social engineering tricks to deliberately confuse the targets into infecting themselves with the .wyvern virus. There are several options that the criminals can opt to use:

  • In-body hyperlinks ‒ The hackers can include links in the body contents of the sent emails. They can redirect to a malicious hosting site or directly to the .wyvern virus samples.
  • File Attachments ‒ The .wyvern virus files can be directly attached to the emails.
  • Infected Documents ‒ The hackers can customize documents of different types to include scripts that deliver the .wyvern virus threat. This is done to many rich text documents, spreadsheets or databases. When such files are opened a prompt notification appears which asks the victims if they want to enable the scripts. If this is done the infection follows.
  • Infected Software Installers ‒ They represent hacker-modified installers of legitimate free or trial applications. The criminals modify them to include the .wyvern virus code after which they are sent to the targets via emails.

Note that the documents and installers can also be distributed via hacker-controlled sites. They may come under different forms: download portals, redirects or fake product pages. In all cases computer users should only seek to look out for software from official vendors only. P2P networks where pirate content is usually found such as BitTorrent can spread the .wyvern virus as well.

Another option is the use of browser hijackers which are malicious browser plugins. They are usually made for the most popular applications: Mozilla Firefox, Internet Explorer, Safari, Opera, Microsoft Edge and etc. Once installed they change important settings such as the default home page, search engine and new tabs page to point to a criminal site. During this process the .wyvern virus can be used to infect the computers as part of the virus sequence. Computer users also need to be careful as hackers have been known to abuse ad networks, redirects and web scripts to cause virus infections as well.

Infection Flow of .wyvern Virus

Security experts detected a new strain of the BTCWare malware family that is called the .wyvern virus. It uses this extension to mark the victim files. The analysis reveals that the current samples work in a way that is similar to previous viruses similar to this one. The .wyvern virus is a typical ransomware threat that seeks to encrypt sensitive files and blackmail the victims for payment.

Depending on the exact configuration of the samples they may contain additional modules including any of the following:

  • Trojan Instance ‒ Hackers can use this feature to spy on the victim machines in real time. At any time they have the ability to record keystrokes, mouse movement and all victim interactions.
  • Information Harvesting ‒ This option allows the hackers to download sensitive user information at any given time.
  • Additional Malware Delivery ‒ The .wyvern virus can be utilized in a complex infection scheme to deliver additional threats to the compromised computers.
  • Registry Changes ‒ Other BTCWare virus strains have been noted to make changes to the compromised systems. This results in system-wide impact in regards to the proper functioning of the Windows operating system, overall performance and other important factors.
  • Persistent Installation ‒ The .wyvern virus files can make important system changes that incur a persistent installation of the threat. This means that manual removal instructions will not work. Victims can remove the instance only by using a quality anti-spyware tool. Refer to our guide below for more information.

Once all operations have been complete the malware instance starts to encrypt a predefined set of sensitive user data according to a prescribed list of target file type extensions. In most cases this contains the most popular data: documents, videos, photos, music, configuration files, databases and etc. A sample set of a typical BTCWare infection affects the following file types:

.1c, .3fr, .accdb, .ai, .arw, .bac, .bay, .bmp, .cdr, .cer, .cfg, .config, .cr2, .crt, .crw, .css, .csv, .db, .dbf,
.dcr, .der, .dng, .doc, .docm, .docx, .dwg, .dxf, .dxg, .eps, .erf, .gif, .htm, .html, .indd, .iso, .jpe, .jpeg, .jpg, .kdc,
.lnk, .mdb, .mdf, .mef, .mk, .mp3, .mp4, .mrw, .nef, .nrw, .odb, .ode, .odm, .odp, .ods, .odt, .orf, .p12, .p7b, .p7c, .pdd, .pdf,
.pef, .pem, .pfx, .php, .png, .ppt, .pptm, .pptx, .psd, .pst, .ptx, .r3d, .rar, .raw, .rtf, .rw2, .rwl, .sql, .sr2, .srf, .srw, .tif,
.wb2, .wma, .wpd, .wps, .x3f, .xlk, .xls, .xlsb, .xlsm, .xlsx, .zip

All files are encrypted according to the following pattern ‒ .[email]-id-.wyvern. This means that the .wyvern virus assigns an unique victim ID to every host. At the moment the exact formula by which it is calculated is not known.

At any rate once the process is complete the victims will see that the majority of their files are encrypted following the pattern. A special ransomware message is crafted in a HELP.hta file which reads the following:

All your files have been encrypted!
All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail [email protected]
You have to pay for decryption in Bitcons. The price depends on how fast you write to us. After payment we will send you the decryption tool that will decrypt all your files.
Free decryption as guarantee
Before paying you can send us up to 3 files for free decryption. The total see of files must be less than 1Mb (non archved), and files should not contain valuable information. (databases, backups, large excel sheets, etc.)
How to obtain Bitcolns
The easiest way to buy bitcoins is localBitcoins site. You have to register, click ‘Buy bitcoins’, and select the seller by payment method and price.
Also you can find other places to buy Bitcoins and beginners gude here:
• Do not rename encrypted files.
• Do not try to decrypt your data using third party software, it may cause permanent data loss.
• Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.

The message reads that the victims need to contact the hackers via the designated e-mail address. To win their favor they offer three “free” decryption attempts. The victims are not given a fixed sum, rather they need to negotiate it.

The security experts were able to extract the public RSA key which is used to identify the threat:

—–BEGIN PUBLIC KEY—– MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCitOoG+zT+UHs8xu7rCRSzj1XFlhatpoG4/dqLm45JWUMo1Usokd2KAOvZQQWIi6AtAqe2XwG3zsu3Mt97LzU/9t5lf30RuNP3y422gX6XvBATeDSyZObsjcx0TeV+r4WR563EsQp19YMAbr9hOfjwJwfzhZJ4ODbRcHBQyWab+wIDAQAB —–END PUBLIC KEY—–

This allows them to track the creation of other related viruses and new attack campaigns using the current .wyvern virus configuration. Only the use of a quality anti-spyware solution can effectively remove all active infections. Once this is done the listed data recovery program in our instructions can restore the affected files in an efficient way.

Remove .wyvern Virus and Restore Data

WARNING! Manual removal of wyvern Virus requires being familiar with system files and registries. Removing important data accidentally can lead to permanent system damage. If you don’t feel comfortable with manual instructions, download a powerful anti-malware tool that will scan your system for malware and clean it safely for you.

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SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

.wyvern – Manual Removal Steps

Start the PC in Safe Mode with Network

This will isolate all files and objects created by the ransomware so they will be removed efficiently. The steps bellow are applicable to all Windows versions.

1. Hit the WIN Key + R

2. A Run window will appear. In it, write msconfig and then press Enter

3. A Configuration box shall appear. In it Choose the tab named Boot

4. Mark Safe Boot option and then go to Network under it to tick it too

5. Apply -> OK

Show Hidden Files

Some ransomware threats are designed to hide their malicious files in the Windows so all files stored on the system should be visible.

1. Open My Computer/This PC

2. Windows 7

    – Click on Organize button
    – Select Folder and search options
    – Select the View tab
    – Go under Hidden files and folders and mark Show hidden files and folders option

3. Windows 8/ 10

    – Open View tab
    – Mark Hidden items option

how to make hidden files visible in Windows 8 10 bestsecuritysearch instructions

4. Click Apply and then OK button

Enter Windows Task Manager and Stop Malicious Processes

1. Hit the following key combination: CTRL+SHIFT+ESC

2. Get over to Processes

3. When you find suspicious process right click on it and select Open File Location

4. Go back to Task Manager and end the malicious process. Right click on it again and choose End Process

5. Next, you should go folder where the malicious file is located and delete it

Repair Windows Registry

1. Again type simultaneously the WIN Key + R key combination

2. In the box, write regedit and hit Enter

3. Type the CTRL+ F and then write the malicious name in the search type field to locate the malicious executable

4. In case you have discovered registry keys and values related to the name, you should delete them, but be careful not to delete legitimate keys

Click for more information about Windows Registry and further repair help

Recover .wyvern Virus Files

WARNING! All files and objects associated with .wyvern Virus should be removed from the infected PC before any data recovery attempts. Otherwise the virus may encrypt restored files. Furthermore, a backup of all encrypted files stored on external media is highly recommendable.

DOWNLOAD .wyvern Virus Removal Tool

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

1. Use present backups

2. Use professional data recovery software

Stellar Phoenix Data Recovery – a specialist tool that can restore partitions, data, documents, photos, and 300 more file types lost during various types of incidents and corruption.

3. Using System Restore Point

    – Hit WIN Key
    – Select “Open System Restore” and follow the steps


4. Restore your personal files using File History

    – Hit WIN Key
    – Type restore your files in the search box
    – Select Restore your files with File History
    – Choose a folder or type the name of the file in the search bar
    – Hit the “Restore” button

Preventive Security Measures

  • Enable and properly configure your Firewall.
  • Install and maintain reliable anti-malware software.
  • Secure your web browser.
  • Check regularly for available software updates and apply them.
  • Disable macros in Office documents.
  • Use strong passwords.
  • Don’t open attachments or click on links unless you’re certain they’re safe.
  • Backup regularly your data.
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    Author : Martin Beltov

    Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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