.sVn Files Virus (Jaff Ransomware) Remove and Restore Files

by Ventsislav Krastev | Last Update: December 30, 2022 | 0 Comments

An article created with the agenda to help you remove Jaff Ransomware’s latest variant using !!!!README_FOR_SAVE FILES.txt and .sVn extension and show how to restore encrypted files.

New version of the notorious Jaff ransomware virus has been detected in the wild by malware researcher Marcelo Rivero(https://twitter.com/MarceloRivero). The virus aims to perform significant changes to the files on the infected computers, so that the files can no longer be opened by the victim. It also adds the .sVn file extension to the encrypted files, changes the wallpaper with a ransom note and drops a text file, named !!!!README_FOR_SAVE FILES.txt to scare off the victims into paying the ransom. If you are a victim of the latest .sVn variant of Jaff ransomware, we advise you to read this article thoroughly.

On this page:

Threat Summary .sVn Ransomware – Infection .sVn File Jaff Ransomware Analysis .sVn Files Virus Encryption Process Remove .sVn Files Virus and Restore Encrypted Files

Threat Summary

Name	.sVn Files Virus (Jaff)
Type	Ransomware, Cryptovirus
Short Description	Being spread by using the same tactics as it’s previous variants. Encrypts the files and then demands a hefty ransom fee to be paid to get them back.
Symptoms	Encrypts the files and puts the .sVn file extension as a suffix. Drops a ransom note, named !!!!README_FOR_SAVE FILES.txt with instructions how to pay the ransom. Changes wallpaper to black and white image.
Distribution Method	Spam Emails, Email Attachments, Executable files
Detection Tool	See If Your System Has Been Affected by malware Download Malware Removal Tool
User Experience	Join Our Forum to Discuss .sVn Files Virus (Jaff).
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.

.sVn Ransomware – Infection

For the infection process, the latest iteration of Jaff continues to use the newly developed scheme of spreading the malicious files by utilizing malicious Microsoft Word documents that are embedded within .PDF files. The latest spam campaign uses the following messages to trick victims into opening the e-mails:

After the victims open the PDF document, they see a message prompting them to open an attached .docm file:

As soon as the victim clicks on the “OK” button on the “Open This File” pop-up box, the PDF file extracts the Microsoft Word document on the computer of the victim. When the document is opened, the victim is asked to click on “Enable Content” to read the contents of the document. However, instead of getting the actual contents, Jaff ransomware infects the computer:

According to malware-traffic-analysis.net there are multiple hosts to which the macro commands are configured connect to download the payload of Jaff .sVn ransomware:

→ 10minutesto1.net – GET /jt7677g6
cafe-bg.com – GET /jt7677g6
community-gaming.de – GET /jt7677g6
cor-huizer.nl – GET /jt7677g6
essentialnulidtro.com/af – GET /jt7677g6
lcpinternational.fr – GET /jt7677g6
luxurious-ss.com – GET /jt7677g6
makh.ch – GET /jt7677g6
myinti.com – GET /jt7677g6
mymobimarketing.com – GET /jt7677g6
oneby1.jp – GET /jt7677g6
seoulhome.net – GET /jt7677g6
sextoygay.be – GET /jt7677g6
squidincdirect.com.au – GET /jt7677g6
studyonazar.com – GET /jt7677g6
supplementsandfitness.com – GET /jt7677g6
zechsal.pl – GET /jt7677g6

.sVn File Jaff Ransomware Analysis

When the victim of Jaff Ransomware opens the malicious files on the infected computer the virus connects to the hosts and downloads the payload on the compromised computer. The virus is coded in the “C” programming language and aims to create multiple Windows registries in the Registry Editor of Windows. These registry strings are created with the suspected goad to launch Windows processes as administrator and perform it’s malicious activity. One of those activities are to run the malicious file of the .sVn Jaff variant automatically on Windows boot.

The Jaff .sVn ransomware also drops it’s ransom note file, named !!!!README_FOR_SAVE FILES.txt and along it, the virus also changes the wallpaper of the victim to a black and white image with the following contents:

“Your decrypt ID: {ID HERE}
Files are encrypted! To decrypt flies you need to obtain the private key.
The only copy of the private key which will allow you to decrypt your files is located on a secret server in the Internet.”

From there, the victim is pointed to a Tor-based web page that aims to convince him to download jaff decryptor, similar to what Locky ransomware(https://sensorstechforum.com/remove-locky-ransomware/) does.

.sVn Files Virus Encryption Process

The encryption of files by .sVn ransomware is perfomed so that only specific types of files are enciphered. The virus hunts for around 400 different file extensions, which are reported to be the following:

→ .xlsx, .acd, .pdf, .pfx, .crt, .der, .cad, .dwg, .MPEG, .rar, .veg, .zip, .txt, .jpg, .doc, .wbk, .mdb, .vcf, .docx, .ics, .vsc, .mdf, .dsr, .mdi, .msg, .xls, .ppt, .pps, .obd, .mpd, .dot, .xlt, .pot, .obt, .htm, .html, .mix, .pub, .vsd, .png, .ico, .rtf, .odt, .3dm, .3ds, .dxf, .max, .obj, .7z, .cbr, .deb, .gz, .rpm, .sitx, .tar, .tar, .gz, .zipx, .aif, .iff, .m3u, .m4a, .mid, .key, .vib, .stl, .psd, .ova, .xmod, .wda, .prn, .zpf, .swm, .xml, .xlsm, .par, .tib, .waw, .001, .002 003, ., .004, .005, .006, .007, .008, .009, .010, .contact, .dbx, .jnt, .mapimail, .oab, .ods, .ppsm, .pptm, .prf, .pst, .wab, .1cd, .3g2, .7ZIP, .accdb, .aoi, .asf, .asp, . aspx, .asx, .avi, .bak, .cer, .cfg, .class, .config, .css, .csv, .db, .dds, .fif, .flv, .idx, .js, .kwm, .laccdb, .idf, .lit, .mbx, .md, .mlb, .mov, .mp3, .mp4, .mpg, .pages, .php, .pwm, .rm, .safe, .sav, .save, .sql, .srt, .swf, .thm, .vob, .wav, .wma, .wmv, .xlsb, .aac, .ai, .arw, .c, .cdr, .cls, .cpi, .cpp, .cs, .db3, .docm, .dotm, .dotx, .drw, .dxb, .eps, .fla, .flac, .fxg, .java, .m, .m4v, .pcd, .pct, .pl, .potm, .potx, .ppam, .ppsx, .ps, .pspimage, .r3d, .rw2, .sldm, .sldx, .svg, .tga, .wps, .xla, .xlam, .xlm, .xltm, .xltx, .xlw, .act, .adp, .al, .bkp, .blend, .cdf, .cdx, .cgm, .cr2, .dac, .dbf, .dcr, .ddd, .design, .dtd, .fdb, .fff, .fpx, .h, .iif, .indd, .jpeg, .mos, .nd, .nsd, .nsf, .nsg, .nsh, .odc, .odp, .oil, .pas, .pat, .pef, .ptx, .qbb, .qbm, .sas7bdat, .say, .st4, .st6, .stc, .sxc, .sxw, .tlg, .wad, .xlk, .aiff, .bin, .bmp, .cmt, .dat, .dit, .edb, .flvv, .gif, .groups, .hdd, .hpp, .log, .m2ts, .m4p, .mkv, .ndf, .nvram, .ogg, .ost, .pab, .pdb, .pif, .qed, .qcow, .qcow2, .rvt, .st7, .stm, .vbox, .vdi, .vhd, .vhdx, .vmdk, .vmsd, .vmx, .vmxf, .3fr, .3pr, .ab4, .accde, .accdt, .ach, .acr, .adb, .srw, .st5, .st8, .std, .sti, .stw, .stx, .sxd, .sxg, .sxi, .sxm, .tex, .wallet, .wb2, .wpd, .x11, .x3f, .xis, .ycbcra, .qbw, .qbx, .qby, .raf, .rat, .raw, .rdb rwl, .rwz, .s3db, .sd0, .sda, .sdf, .sqlite, .sqlite3, .sqlitedb, .sr, .srf, .oth, .otp, .ots, .ott, .p12, .p7b, .p7c, .pdd, .pem, .plus_muhd, .plc, .pptx, .psafe3, .py, .qba, .qbr, .myd, .ndd, .nef, .nk, .nop, .nrw, .ns2, .ns3, .ns4, .nwb, .nx2, .nxl, .nyf, .odb, .odf, .odg, .odm, .ord, .otg, .ibz, .iiq, .incpas, .jpe, .kc2, .kdbx, .kdc, .kpdx, .lua, .mdc, .mef, .mfw, .mmw, .mny, .moneywell, .mrw, .des, .dgc, .djvu, .dng, .drf, .dxg, .eml, .erbsql, .erd, .exf, .ffd, .fh, .fhd, .gray, .grey, .gry, .hbk, .ibank, .ibd, .cdr4, .cdr5, .cdr6, .cdrw, .ce1, .ce2, .cib, .craw, .crw, .csh, .csl, .db_journal, .dc2, .dcs, .ddoc, .ddrw, .ads, .agdl, .ait, .apj, .asm, .awg, .back, .backup, .backupdb, .bank, .bay, .bdb, .bgt, .bik, .bpw, .cdr3, .as4

When the file types which Jaff is configured to encode are detected, the virus may use a combination of two strong ciphers to encrypt the files:

AES algorithm for the files.
RSA algorithm to create unique private and public keys for each file or set of files and make decryption more difficult.

After the files are encrypted, they assume the .sVn file extension and look like the following:

After the .sVn Jaff ransomware has already encrypted the files, it may also delete the shadow volume copies and hence eliminate any change of you restoring your files via Windows backup features. The commands It may use for this to happen are believed to be the following:

→ process call create “cmd.exe /c
vssadmin.exe delete shadows /all /quiet
bcdedit.exe /set {default} recoveryenabled no
bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures

Remove .sVn Files Virus and Restore Encrypted Files

Before you start removing malicious files and objects created by Jaff on your computer, you should backup the encrypted files, just in case. Then you can proceed with the removal by following the instructions for eliminating Jaff .sVn ransom variant below. They are specifically designed to help you delete the virus either manually or automatically. If you lack the experience in removing malware, experts often advise turning to an advanced anti-malware program which will help you delete the .sVn files virus automatically and protect your computer against future infections.

For the moment, there is no known free decryptor for the .sVn files virus. However, we are closely monitoring the situation and we recommend you to check our blog post for updates. In the meantime, you can try to restore a portion of your encrypted files preferably by using the alternative methods for file recovery in step “2. Restore files encrypted by .sVn Files Virus” below. They are not 100% guaranteed to help you recover all of the encrypted files, but with their aid you may restore a portion of them.

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.

Step 1: Scan for .sVn Files Virus (Jaff) with SpyHunter Anti-Malware Tool

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

Download

Malware Removal Tool

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.

scan for and delete ransomware virus step 2

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

scan for and delete ransomware virus step 3

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.

scan for and delete ransomware virus step 4

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

Ransomware Automatic Removal - Video Guide

Step 2: Uninstall .sVn Files Virus (Jaff) and related malware 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. delete ransomware from windows step 1

2. In the field type in "appwiz.cpl" and press ENTER. delete ransomware from windows step 2

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" delete ransomware from windows step 3

Follow the instructions above and you will successfully delete most unwanted and malicious programs.

Step 3: Clean any registries, created by .sVn Files Virus (Jaff) 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 .sVn Files Virus (Jaff) there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK. delete ransomware virus registries step 1

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

3. You can remove the value of the virus by right-clicking on it and removing it. delete ransomware virus registries step 3

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: Boot Your PC In Safe Mode to isolate and remove .sVn Files Virus (Jaff)

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. remove ransomware in safe mode step 1

2. The "Run" Window will appear. In it, type "msconfig" and click OK. remove ransomware in safe mode step 2

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK". remove ransomware in safe mode step 3

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. remove ransomware in safe mode step 4

5. You can recognise Safe Mode by the words written on the corners of your screen. remove ransomware in safe mode step 5

Step 5: Try to Restore Files Encrypted by .sVn Files Virus (Jaff).

Method 1: Use STOP Decrypter by Emsisoft.

Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.

Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:

1 Right-click on the decrypter and click on Run as Administrator as shown below:

stop ransomware decryptor step 1

2. Agree with the license terms:

stop ransomware decryptor step 2

3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:

stop ransomware decryptor step 3

4. Click on "Decrypt" and wait for your files to be decoded.

stop ransomware decryptor step 4

Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.

Method 2: Use data recovery software

Ransomware infections and .sVn Files Virus (Jaff) 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 recommended Data Recovery software by clicking on the link underneath:

EaseUS Data Recovery Software

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

.sVn Files Virus (Jaff)-FAQ

What is .sVn Files Virus (Jaff) Ransomware?

.sVn Files Virus (Jaff) 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 algorithms 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.

What Does .sVn Files Virus (Jaff) Ransomware Do?

Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.

Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.

How Does .sVn Files Virus (Jaff) Infect?

Via several ways..sVn Files Virus (Jaff) Ransomware infects computers by being sent via phishing emails, 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.

Another way you may become a victim of .sVn Files Virus (Jaff) 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 ..sVn Files Virus (Jaff) files?

You can't without a decryptor. At this point, the ..sVn Files Virus (Jaff) files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.

What to Do If a Decryptor Does Not Work?

Do not panic, and backup the files. If a decryptor did not decrypt your ..sVn Files Virus (Jaff) files successfully, then do not despair, because this virus is still new.

Can I Restore "..sVn Files Virus (Jaff)" Files?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore ..sVn Files Virus (Jaff) files.

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

How To Get Rid of .sVn Files Virus (Jaff) Virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.

It will scan for and locate .sVn Files Virus (Jaff) ransomware and then remove it without causing any additional harm to your important ..sVn Files Virus (Jaff) files.

Can I Report Ransomware to Authorities?

In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.

Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:

Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:

Germany - Offizielles Portal der deutschen Polizei

United States - IC3 Internet Crime Complaint Centre

United Kingdom - Action Fraud Police

France - Ministère de l'Intérieur

Italy - Polizia Di Stato

Spain - Policía Nacional

Netherlands - Politie

Poland - Policja

Portugal - Polícia Judiciária

Greece - Cyber Crime Unit (Hellenic Police)

India - Mumbai Police - CyberCrime Investigation Cell

Australia - Australian High Tech Crime Center

Reports may be responded to in different timeframes, depending on your local authorities.

Can You Stop Ransomware from Encrypting Your Files?

Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.

Can .sVn Files Virus (Jaff) Ransomware Steal Your Data?

Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.

In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.

Can Ransomware Infect WiFi?

Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.

Should I Pay Ransomware?

No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.

What Happens If I Don't Pay Ransom?

If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.

Can a Ransomware Attack Be Detected?

Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.

It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.

Do Ransomware Criminals Get Caught?

Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.

About the .sVn Files Virus (Jaff) Research

The content we publish on SensorsTechForum.com, this .sVn Files Virus (Jaff) how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.

How did we conduct the research on this ransomware?

Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.

Furthermore, the research behind the .sVn Files Virus (Jaff) ransomware threat is backed with VirusTotal and the NoMoreRansom project.

To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.

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.